How to Grow Tomatoes: Complete Guide for Bigger Harvests

To grow healthy tomatoes, give them plenty of sunlight, warm conditions, fertile soil, strong support, and consistent watering.

Plant tomatoes outside only after the risk of frost has passed. Space them far enough apart for airflow, support them before they become heavy, and water deeply at soil level rather than wetting the leaves.

The basic process is simple:

1. Choose a tomato variety suited to your space.
2. Sow seeds indoors or buy healthy young plants.
3. Wait until conditions are warm enough.
4. Plant deeply in fertile, well-drained soil.
5. Add support immediately.
6. Water consistently.
7. Feed once the plant begins flowering and producing fruit.
8. Prune according to the type of tomato.
9. Check regularly for pests, diseases, and watering problems.
10. Harvest when the fruits are fully coloured and slightly soft.

Tomatoes are not completely maintenance-free, but they are forgiving plants. Give them warmth, support, and steady care, and they can produce food for months.

At StrongEcho, we grow tomatoes in our greenhouse in the Netherlands. Cooler springs, humid conditions, and sudden changes in sunlight can all affect how quickly the plants develop.

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Grow More Tomatoes with These Companion Planting Hacks! [Video]

Choose the Right Type of Tomato

Choosing a tomato variety that suits your space makes the rest of the growing process much easier.

Tomatoes are usually divided into two main groups: determinate and indeterminate.

Determinate tomatoes

Determinate tomatoes are often described as bush tomatoes.

They reach a more limited size and produce most of their crop within a shorter period. This can be useful when you want a concentrated harvest for sauces or preserving.

They also work well in containers, although even compact tomato plants need a sufficiently large pot.

Avoid aggressively removing side shoots from determinate tomatoes. Those shoots may carry a significant part of the potential harvest.

Indeterminate tomatoes

Indeterminate tomatoes keep growing until cold weather, disease, or pruning stops them.

They are well suited to:

• Greenhouses
• Polytunnels
• Tall supports
• Vertical gardens
• Long harvesting seasons
• Gardeners willing to prune regularly

These plants can become several metres long under suitable conditions.

Cherry, plum, beefsteak, or slicing tomatoes?

The fruit shape does not tell you whether a tomato is determinate or indeterminate. Always check the seed packet or plant label.

Consider:

• Cherry tomatoes: Usually productive and beginner-friendly.
• Plum tomatoes: Fleshy fruits suited to sauces and cooking.
• Slicing tomatoes: Medium or large fruits for sandwiches and salads.
• Beefsteak tomatoes: Large fruits that need warmth, support, and a longer season.
• Dwarf tomatoes: Compact plants bred for containers and small spaces.

Choose varieties that can ripen within your local growing season.

In cooler climates, early-ripening cherry and medium-sized tomatoes are often more dependable than very large beefsteak varieties.

Tomato Planting Date Calculator

Use your expected final frost date to estimate when to sow tomato seeds and when to begin hardening off your plants.

When to Sow Tomato Seeds

Sow tomato seeds indoors approximately six to eight weeks before you expect to plant them into their final position.

Starting too early is not always helpful.

Plants kept indoors for too long can become:

• Tall and weak
• Root-bound
• Difficult to transport
• More vulnerable to transplant shock
• Too large for the available light

The goal is to produce a compact, healthy young plant rather than the tallest seedling.

Approximate timing in the Netherlands

For many growers in the Netherlands:

• Seeds are started indoors from late February to April.
• Tomatoes may move into an unheated greenhouse during April or May, depending on night temperatures.
• Outdoor tomatoes are usually planted after the main frost risk has passed, often around or after the middle of May.
• Cold, windy, or unusually wet weather may require a later planting date.

A sunny windowsill can work for a small number of seedlings, but weak winter or early-spring light often causes stretched growth.

Grow lights can produce stronger, more compact plants.

How to Sow Tomato Seeds

Step 1: Fill small pots or trays

Use a clean seed-starting mix that drains well.

Moisten the compost before sowing. It should feel evenly damp rather than soaked.

Step 2: Sow the seeds

Place each seed approximately 0.5 centimetres deep.

You can sow:

• One or two seeds per small pot.
• Several seeds in a tray before transplanting them.
• Individual seeds in cell trays.

Cover lightly with seed-starting mix.

Step 3: Keep the seeds warm

Tomato seeds germinate best in warm conditions.

Place the tray somewhere warm, but do not allow the growing medium to dry completely.

A clear lid can help maintain humidity during germination. Remove or ventilate it once seedlings appear.

Step 4: Provide strong light

Move germinated seedlings into bright light immediately.

Weak light causes thin stems and stretched plants.

When using grow lights:

• Position them close enough to prevent stretching.
• Follow the manufacturer’s safety guidance.
• Raise the lights as the plants grow.
• Give the plants a daily dark period.

Step 5: Thin or transplant seedlings

When seedlings develop their first true leaves, move them into individual pots if they were sown together.

Handle seedlings by their leaves rather than squeezing the fragile stem.

Plant them slightly deeper than they were growing before. Tomato stems can develop additional roots when buried.

How to Care for Tomato Seedlings

Young tomato plants need light, warmth, moisture, and enough space to develop strong roots.

Water carefully

Water when the surface begins to dry.

Do not keep the compost permanently saturated. Waterlogged roots receive less oxygen and may become damaged.

Water from below when practical, or water gently around the compost rather than repeatedly soaking the leaves.

Turn windowsill plants

Seedlings lean toward the strongest source of light.

Turn the pots regularly to encourage straighter growth. This will not completely solve poor light, but it can reduce one-sided leaning.

Pot them on before they become root-bound

Move plants into larger pots when:

• Roots fill the existing container.
• The compost dries unusually quickly.
• Growth slows despite suitable light and warmth.
• The plant becomes top-heavy.
• Roots begin circling inside the pot.

Do not jump from a tiny seed cell directly into a very large, constantly wet container. Increase the pot size gradually.

Avoid excessive feeding

Fresh seed compost or potting mix normally contains enough nutrients for early growth.

Begin feeding only when the plants need it and follow the product instructions. Excess fertiliser can damage young roots or create soft, weak growth.

How to Choose Healthy Tomato Plants

When buying tomato plants, look for:

• Thick, sturdy stems.
• Green leaves.
• Compact growth.
• No obvious insects.
• No sticky residue or webbing.
• No large brown or black spots.
• Roots that are developed but not severely tangled.
• A clear variety label.

Avoid plants that are:

• Extremely tall and thin.
• Flowering heavily in a very small pot.
• Badly wilted.
• Covered in yellow leaves.
• Showing distorted new growth.
• Infested with aphids or whiteflies.

A slightly smaller, compact plant often establishes better than an oversized plant that has remained in its pot for too long.

Harden Off Tomato Plants Before Planting

Indoor-grown tomatoes need time to adjust to outdoor conditions.

Sunlight, wind, temperature changes, and lower humidity can damage plants that are moved outside too suddenly.

Begin hardening off approximately 7 to 14 days before planting.

A simple tomato hardening-off schedule

1. Place the plants outside in a sheltered, shaded position for one or two hours.
2. Bring them back inside before conditions become cold.
3. Gradually increase the time outdoors.
4. Introduce gentle morning or evening sunlight.
5. Slowly expose them to longer periods of direct sun.
6. Avoid strong wind, heavy rain, and cold nights.
7. Plant once the tomatoes can remain outside comfortably.

Plants may need longer when indoor and outdoor conditions differ greatly.

Greenhouse-grown seedlings also need acclimatisation before moving into open ground.

Where to Grow Tomatoes

Tomatoes can grow in:

• Open ground
• Raised beds
• Greenhouses
• Polytunnels
• Large containers
• Grow bags
• Balcony gardens
• Vertical growing systems

The best place provides sunlight, warmth, airflow, and easy access for watering.

Sunlight

Tomatoes generally need at least six to eight hours of direct sunlight.

More light is often beneficial in cooler climates, provided the plants do not become dangerously overheated or dehydrated.

In a greenhouse, extreme heat can reduce fruit set. Use ventilation and shading when necessary.

Shelter

A sheltered position can protect outdoor tomatoes from strong winds.

However, complete enclosure without ventilation can create humid conditions that favour disease.

Aim for shelter without stagnant air.

Crop rotation

Avoid growing tomatoes repeatedly in the same soil where tomatoes, potatoes, peppers, or aubergines recently grew.

These crops belong to the same plant family and share several soil-borne and foliar diseases.

Rotation is more difficult in small gardens and permanent greenhouse beds. Where rotation is limited:

• Remove diseased plant material.
• Replace or improve container compost.
• Keep tools and supports clean.
• Avoid leaving infected roots and leaves behind.
• Consider growing in fresh containers or grow bags.

Prepare the Soil

Tomatoes prefer fertile, well-drained soil containing plenty of organic matter.

Before planting:

• Remove weeds.
• Loosen compacted soil.
• Add well-rotted compost where needed.
• Check that water drains rather than collecting around the roots.
• Install permanent support systems.
• Use a soil test when nutrient or pH problems are suspected.

A soil pH around 6.0 to 6.8 suits tomatoes well.

Do not add large amounts of fertiliser without understanding what the soil already contains.

Excess nitrogen can produce enormous green plants with relatively little fruit.

How to Plant Tomatoes

Step 1: Water the young plant

Water the tomato before removing it from its pot.

A moist root ball is less likely to fall apart during planting.

Step 2: Dig a deep planting hole

Tomatoes can produce roots along buried sections of stem.

Remove the lowest leaves and plant the tomato deeper than it was growing in its pot.

This can produce a larger root system and help support a tall seedling.

Do not bury the graft union of a grafted tomato plant. Keep the swollen graft point safely above soil level so the upper variety does not form its own roots.

Step 3: Space the plants properly

Spacing depends on the variety and training method.

As a general starting point:

• Compact determinate plants: approximately 45 to 60 cm apart.
• Supported indeterminate plants: approximately 45 to 75 cm apart.
• Large unpruned plants: approximately 75 to 90 cm or more apart.
• Container plants: usually one tomato per large container.

Check the seed packet for variety-specific guidance.

More space may be needed in humid climates or greenhouses with limited ventilation.

Step 4: Firm the soil gently

Fill around the root ball and press the soil gently.

Do not heavily compact the soil.

Step 5: Water thoroughly

Water slowly around the root zone.

This settles the soil around the roots and removes large air pockets.

Step 6: Add support immediately

Tie the plant loosely to its support.

Do not wait until the stem begins falling sideways.

Tomato Support Options

Tomato plants become heavy as stems, leaves, and fruits develop.

Unsupported plants can:

• Snap.
• Fall across paths.
• Rest on wet soil.
• Become difficult to inspect.
• Develop dense, poorly ventilated foliage.
• Hide ripe fruit.

Stakes

Strong stakes work well for plants trained to one or several stems.

Push the stake firmly into the soil without damaging the main root system.

Use soft ties and leave room for the stem to thicken.

Strings

Strings are useful for indeterminate greenhouse tomatoes.

Secure the upper end to a strong frame. Attach the lower end carefully near the plant or to a ground anchor.

Wind the plant around the string gradually as it grows.

Do not force or sharply bend the stem.

Tomato cages

Cages work well for bushier plants and varieties grown with multiple stems.

Choose a cage large and strong enough for the mature plant. Small decorative cages are often overwhelmed by vigorous tomatoes.

Trellises

A trellis can support several tomato plants in a row.

Tie stems regularly and keep growth organised before the plants become tangled.

How to Water Tomato Plants

Tomatoes need consistent access to water.

Repeatedly allowing the soil to become extremely dry and then soaking it can contribute to:

• Fruit cracking.
• Blossom end rot.
• Wilting.
• Flower loss.
• Uneven growth.
• Reduced nutrient uptake.

Water deeply

Encourage roots to grow downward by watering the root zone thoroughly.

Frequent shallow watering encourages roots to remain close to the surface.

Water according to the soil

There is no universal watering schedule.

The correct frequency depends on:

• Temperature.
• Sunlight.
• Wind.
• Plant size.
• Soil type.
• Mulch.
• Container size.
• Greenhouse conditions.
• Recent rainfall.

Push a finger several centimetres into the soil or use a moisture check before watering.

The surface may appear dry while deeper soil remains moist.

Water at soil level

Apply water around the roots rather than repeatedly wetting the leaves.

This is particularly important in humid conditions and late in the day.

Drip irrigation, soaker hoses, or careful hand watering can all work.

Water in the morning

Morning watering allows any accidentally wet foliage to dry more quickly.

It also gives the plants access to moisture before the warmest part of the day.

Mulch the soil

Organic mulch can help:

• Reduce evaporation.
• Suppress weeds.
• Limit soil splash.
• Moderate soil temperature.
• Keep low leaves away from bare soil.

Leave a small gap around the stem rather than piling wet mulch against it.

Watering Tomatoes in Containers

Container tomatoes can dry out much faster than plants growing in open soil.

During hot weather, a large fruiting plant may need checking every day.

Use a container with:

• Adequate drainage holes.
• Enough volume for the mature plant.
• Good-quality potting mix.
• Space at the top for watering.
• A stable base that will not fall over.

Water until excess moisture drains from the bottom.

Do not allow the pot to sit permanently in stagnant water.

Small pots create large swings between wet and dry conditions. A larger container is usually easier to manage.

How to Feed Tomato Plants

Tomatoes need nutrients, but more fertiliser does not automatically produce more tomatoes.

Before flowering

Young plants need balanced growth.

Too much nitrogen can produce:

• Dark green foliage.
• Very long stems.
• Excessive side shoots.
• Fewer flowers.
• Delayed fruiting.

After flowering begins

Once flowers and small fruits appear, use a fertiliser formulated for tomatoes or fruiting vegetables where feeding is needed.

Follow the label instructions.

Do not increase the concentration in an attempt to produce faster results. Overfeeding can damage roots and create nutrient imbalances.

Tomatoes growing in the ground

Well-prepared soil containing compost may require less frequent feeding than container compost.

Watch the plants and consider a soil test before repeatedly applying nutrients.

Tomatoes in containers or grow bags

Nutrients wash out of containers more quickly.

Begin regular feeding after the original compost nutrients become depleted or when the product instructions recommend it.

Keep watering and feeding consistent.

Should You Prune Tomato Plants?

Pruning depends on the type of tomato and how you intend to grow it.

Pruning indeterminate tomatoes

Indeterminate tomatoes are often trained to one or several main stems.

Remove selected side shoots that grow from the joint between a leaf and the main stem.

Removing side shoots can:

• Keep the plant manageable.
• Improve airflow.
• Make tying and harvesting easier.
• Direct growth into selected stems.

It does not mean every leaf or shoot should be removed.

The plant still needs healthy leaves to produce energy.

Check plants regularly while side shoots are small. Large shoots leave bigger wounds when removed.

Pruning determinate tomatoes

Determinate tomatoes generally need less pruning.

Aggressively removing side shoots can reduce the number of flowers and fruits because the plant has a limited growth pattern.

Remove only:

• Damaged leaves.
• Diseased material.
• Leaves touching the soil.
• Growth that severely blocks airflow or access.
• Remove lower leaves carefully

As the plant grows, remove leaves that touch the soil or become yellow and unhealthy.

This can reduce soil contact and improve airflow around the base.

Do not remove a large percentage of healthy foliage at once.

Use clean hands or clean pruning tools.

How to Train Tomatoes Vertically

Vertical growing is especially useful in greenhouses and small gardens.

To train an indeterminate tomato vertically:

• Select one strong main stem.
• Tie it loosely to a stake or guide it around a string.
• Check the plant at least once a week.
• Remove unwanted side shoots while they are small.
• Add new ties as the plant grows.
• Remove lower leaves gradually.
• Keep the top organised so it does not tangle with neighbouring plants.
• Stop the plant near the end of the season when remaining fruits need time to ripen.

Do not wrap string tightly around the stem.

The stem thickens throughout the season and can become damaged by tight ties.

Tomato Flowers and Pollination

Tomato flowers contain both male and female reproductive parts and can pollinate themselves.

However, the pollen still needs to move within the flower.

Outdoors, wind and insects usually provide enough movement.

Inside a greenhouse, you can help by:

• Gently tapping the flower trusses.
• Shaking the support string lightly.
• Improving ventilation.
• Encouraging pollinating insects.
• Using an electric pollination tool where necessary.

Do this gently. Strong shaking can damage flowers or stems.

Why tomato flowers fall off

Flower drop can result from:

• Very high temperatures.
• Cold nights.
• High humidity.
• Very low humidity.
• Water stress.
• Excessive nitrogen.
• Poor pollination.
• Sudden environmental changes.

A few dropped flowers are normal. Repeated flower loss across the plant suggests that growing conditions need attention.

How to Grow Tomatoes in a Greenhouse

Greenhouses provide warmth and protection, but they also introduce challenges.

Advantages

Earlier planting.
Longer growing season.
Protection from heavy rain.
Easier vertical training.
Better control over watering.
Reduced exposure to some outdoor diseases.

Challenges

High humidity.
Extreme heat.
Whiteflies and aphids.
Poor airflow.
Rapid water loss during sunny weather.
Reduced natural pollination.
Diseases spreading quickly between crowded plants.

Greenhouse tomato care

Open vents and doors regularly.
Keep paths clear.
Space plants generously.
Water at soil level.
Remove lower leaves gradually.
Train plants before they become tangled.
Inspect leaf undersides.
Shake flower trusses gently.
Use shading during dangerous heat.
Remove unhealthy plant material promptly.

In our greenhouse in the Netherlands, humidity management is often as important as watering.

Adding more plants beneath the tomatoes can look productive, but dense growth can slow leaf drying and make pests harder to spot.

How to Grow Tomatoes Outside

Outdoor tomatoes need the warmest, sunniest, most sheltered position available.

Choose varieties that ripen early enough for your climate.

Outdoor growing tips

• Wait until frost risk has passed.
• Harden plants off gradually.
• Protect them from strong wind.
• Use dark walls or sheltered courtyards to provide extra warmth.
• Keep foliage away from wet soil.
• Water during dry weather.
• Mulch after the soil has warmed.
• Check plants after heavy rain and wind.
• Harvest remaining fruit before cold autumn weather.

Outdoor tomatoes in cool, wet climates may face more disease pressure than protected plants.

Good spacing and early-ripening varieties can make a significant difference.

How to Grow Tomatoes in Pots

Container growing is useful for balconies, patios, and gardens with poor soil.

Choose a large container

A full-size tomato generally needs at least 30 to 40 litres, with larger containers preferred for vigorous varieties.

Compact dwarf tomatoes may manage in smaller pots, but larger soil volumes make watering and feeding easier.

Use suitable potting mix

Do not fill containers with heavy garden soil alone.

Use a high-quality potting mix designed for containers. It should hold moisture while still draining freely.

Grow one main tomato per pot

Overcrowding a container leads to competition for:

• Water.
• Nutrients.
• Root space.
• Light.
• Airflow.

Small herbs or flowers can sometimes share a very large pot, but separate containers provide more control.

Add support before the plant becomes large

Place the stake, cage, or trellis at planting time.

A mature tomato can make a pot unstable, so secure tall plants and use a broad, heavy container.

Check water frequently

Containers may need daily checks in warm or windy weather.

Water thoroughly rather than applying a small splash to the surface.

Tomato Companion Plants

Tomatoes can grow alongside herbs, flowers, and compact vegetables.

Useful companions include:

• Basil
• Sweet alyssum
• Marigolds
• Nasturtiums
• Calendula
• Chives
• Onions
• Garlic
• Parsley
• Coriander
• Dill
• Chamomile
• Borage
• Yarrow

Companion planting does not create a guaranteed pest barrier.

Choose plants because they provide a clear benefit, such as:

• An edible harvest.
• Flowers for visiting insects.
• Ground cover.
• Better use of vertical and horizontal space.
• A carefully monitored trap crop.

Keep the tomato canopy open and avoid filling every gap. More about the top tomato companion plants.

Read our full guide to tomato companion plants.

Common Tomato Problems

Blossom End Rot

Blossom end rot appears as a dark, sunken area at the bottom of the tomato.

The plant is unable to move enough calcium into the developing fruit.

This does not always mean the soil lacks calcium.

Common contributing factors include:

• Irregular watering.
• Roots drying out.
• Waterlogged soil.
• Root damage.
• Excessive fertiliser salts.
• Rapid growth.
• A root system that has not fully established.

What to do

• Remove badly affected fruits.
• Keep the soil evenly moist.
• Mulch the root zone.
• Avoid damaging roots.
• Do not apply calcium products without evidence that calcium is actually deficient.
• Avoid excessive fertiliser.

New fruits can develop normally once growing conditions become more stable.

Tomato Leaves Turning Yellow

One or two old lower leaves turning yellow is not always a serious problem.

Concern increases when yellowing:

• Moves rapidly upward.
• Affects new leaves.
• Appears between leaf veins.
• Includes brown or black spots.
• Occurs alongside wilting.
• Affects several plants.
• Appears with insects or webbing.

Possible causes include:

• Too much water.
• Too little water.
• Nitrogen deficiency.
• Magnesium or other nutrient problems.
• Root damage.
• Cold soil.
• Natural leaf ageing.
• Disease.
• Pest feeding.

Do not diagnose yellow leaves based on colour alone.

Check the entire plant, soil moisture, recent weather, and location of the symptoms.

Upload a clear photo to the StrongEcho AI Plant Health Identifier for help examining visible symptoms.

Aphids, Whiteflies, and Other Tomato Pests

Tomato plants can attract:

• Aphids
• Whiteflies
• Spider mites
• Leaf miners
• Caterpillars
• Thrips
• Fungus gnats
• Slugs and snails
• Flea beetles
• Tomato moth larvae

Inspect plants regularly, especially:

• Young growing tips.
• Leaf undersides.
• Flower clusters.
• Folded or curled leaves.
• Areas containing sticky residue.
• Leaves with pale dots or webbing.
• Fruit with holes or feeding damage.

Early infestations are usually easier to manage.

Remove badly affected leaves where appropriate, improve plant spacing, control weeds, and use pest-management methods suitable for your location.

Not sure what is eating your tomato plant? Upload a clear image to the StrongEcho AI Pest Identifier.

Tomato Diseases

Tomatoes can develop fungal, bacterial, and viral diseases.

Possible warning signs include:

• Rapidly spreading leaf spots.
• Dark stem lesions.
• Water-soaked patches.
• Sudden wilting.
• Distorted new growth.
• Ring patterns.
• Mottled leaves.
• Brown fruit lesions.
• Large sections of the plant dying.

Reduce disease risk

• Space plants properly.
• Provide ventilation.
• Water at soil level.
• Avoid working with wet plants.
• Remove diseased material.
• Clean tools.
• Rotate crops where possible.
• Avoid leaving infected material in the bed.
• Choose resistant varieties where available.
• Keep leaves away from the soil.
• Inspect new plants before introducing them.

A photo-based tool can help you examine symptoms, but serious or rapidly spreading diseases may require confirmation from a local horticultural service or laboratory.

Why a Tomato Plant Is Not Growing

Slow growth can result from:

• Cold temperatures.
• Insufficient sunlight.
• Waterlogged soil.
• A container that is too small.
• Root damage.
• Nutrient problems.
• Transplant shock.
• Pest infestation.
• Disease.
• Excessive flowering on a young plant.
• Poor-quality compost.
• Competing plants.

Check the growing conditions before adding fertiliser.

Cold soil and damaged roots cannot be corrected by applying more food.

Young plants often pause briefly after transplanting while they establish new roots.

Why Tomato Plants Produce Flowers but No Fruit

When flowers appear but fruits do not form, check:

• Day and night temperatures.
• Greenhouse ventilation.
• Humidity.
• Pollination.
• Watering consistency.
• Nitrogen levels.
• Whether flowers are falling.
• Whether the plant is under severe stress.

Gently vibrating the flower clusters can improve pollination in protected growing spaces.

Do not shake the entire plant violently.

When to Stop Tomato Plants

Indeterminate tomatoes may continue producing new flowers even when there is not enough time for those fruits to ripen.

Several weeks before the expected end of the growing season:

• Remove the growing tip.
• Remove new flower clusters unlikely to mature.
• Continue caring for existing fruits.
• Remove excessive new side shoots.
• Maintain healthy leaves around developing fruit.

Do not strip the plant bare.

Leaves are still needed to support ripening and protect fruits from sun damage.

In our greenhouse in the Netherlands, stopping the plants later in the season helps direct the remaining growing time toward tomatoes already on the vines.

When and How to Harvest Tomatoes

Harvest tomatoes when they have developed the expected colour for the variety and feel slightly softer than an unripe fruit.

A ripe tomato should release with a gentle twist or cut.

Harvest regularly

Frequent harvesting:

• Reduces the weight on branches.
• Makes ripe fruit easier to spot.
• Prevents overripe fruit from splitting or falling.
• Encourages you to inspect the plant.

Can tomatoes ripen indoors?

Tomatoes that have begun changing colour can continue ripening indoors.

Before cold weather, harvest mature green or partially coloured fruit and place it somewhere dry at room temperature.

Keep them out of intense direct sunlight.

Check regularly and remove any fruit showing rot.

Do tomatoes need sunlight to ripen?

Tomatoes need warmth and natural ripening processes more than direct sunlight after picking.

A sunny windowsill can become too hot and may soften fruit unevenly.

End-of-Season Tomato Care

When the season ends:

• Harvest usable fruit.
• Remove strings, ties, and clips.
• Pull out the tomato plant, including as much root material as practical.
• Inspect the plant for disease.
• Dispose of seriously diseased material appropriately.
• Clean reusable supports.
• Remove fallen fruit and leaves.
• Record which varieties performed well.
• Plan crop rotation.
• Improve the soil for the next crop.

Do not compost heavily diseased plant material unless your composting system reliably destroys the relevant pathogen.

Our Experience Growing Tomatoes at StrongEcho

We grow tomatoes in our greenhouse in the Netherlands, where the protected environment extends the season but also creates challenges.

Tomatoes can grow quickly once the weather warms. If we delay tying, pruning, or removing lower leaves, the plants become difficult to manage surprisingly fast.

The most important lessons have been simple:

Install support early.
Do not overcrowd plants.
Check them frequently.
Water consistently.
Act while side shoots and pest populations are still small.
Keep greenhouse air moving.
Do not assume every yellow leaf needs fertiliser.

We grow more food than we need when possible, and part of the harvest is donated to local organisations.

A productive tomato plant can contribute a surprising amount to that total, but the goal is not to force maximum growth at any cost. Healthy, manageable plants usually produce a more useful harvest than overcrowded plants that are difficult to inspect.

Tomato Growing Checklist

Frequently Asked Questions

Are tomatoes easy to grow?

Tomatoes are suitable for beginners, but they need regular care.

The most important jobs are watering, supporting, inspecting, and harvesting. Indeterminate varieties may also need weekly pruning and tying.

Cherry tomatoes and compact varieties are often easier for first-time growers than very large beefsteak tomatoes.

How long do tomatoes take to grow?

Many tomatoes take approximately 60 to 100 days from transplanting to mature fruit, depending on the variety and growing conditions.

Plants started from seed need additional time to germinate and reach transplanting size.

Cold weather, weak light, and transplant stress can delay growth.

What month should I plant tomatoes?

Planting month depends on your climate and growing system.

Plant outside after frost risk has passed and nights are reliably mild. In the Netherlands, outdoor planting often takes place around or after the middle of May.

An unheated greenhouse may allow earlier planting, but cold nights can still damage young tomatoes.

How deep should tomatoes be planted?

Plant non-grafted tomatoes deeper than they grew in their original pot.

Remove the lowest leaves and bury part of the stem. The buried stem can form additional roots.

Keep the graft union of grafted tomatoes above the soil.

How far apart should tomato plants be?

Many tomatoes need approximately 45 to 90 centimetres of space.

Compact determinate plants may need less room than large, unpruned indeterminate plants.

Increase spacing when humidity is high or airflow is limited.

How often should tomato plants be watered?

Water when the root zone begins to dry rather than following a fixed calendar.

Young plants, mature plants, containers, greenhouses, and outdoor beds all dry at different speeds.

Water deeply and consistently. Avoid repeatedly allowing the plant to wilt before soaking it.

Can tomatoes grow in shade?

Tomatoes may survive in partial shade, but fruit production and ripening are usually reduced.

Aim for at least six to eight hours of direct sunlight.

In very hot climates, some afternoon protection may reduce heat stress, but tomatoes still need strong light.

Do tomato plants need support?

Most tomato plants benefit from support.

Indeterminate varieties need strong stakes, strings, cages, or trellises. Even compact determinate tomatoes can become heavy when covered in fruit.

Install supports before the plants become large.

Should I remove tomato side shoots?

Remove selected side shoots from indeterminate tomatoes when training them vertically.

Do not aggressively remove side shoots from determinate varieties because this may reduce the harvest.

Always identify the tomato type before pruning heavily.

Should I remove the first tomato flowers?

Healthy, established plants do not automatically need their first flowers removed.

Removing flowers may help a very small, stressed, or root-bound plant focus on establishing after transplanting.

A strong plant already growing in its final position can usually keep its flowers.

Why are my tomatoes not turning red?

Ripening can slow because of cool weather, extreme heat, heavy foliage, variety characteristics, or the natural time required for fruit development.

Tomatoes often remain green for several weeks before changing colour.

Near the end of the season, remove new flowers unlikely to mature and allow existing fruits more time.

Can I grow tomatoes from supermarket tomatoes?

Seeds from supermarket tomatoes may germinate, but the resulting plants may not produce fruit identical to the original tomato.

Many commercial tomatoes are hybrids. Their seeds can produce unpredictable plants.

For dependable results, use named seeds from a reliable source.

Identify Tomato Problems Earlier

Tomato problems are easier to manage when they are noticed early.

Check your plants while watering and tying them. Look beneath the leaves and inspect new growth, stems, flowers, and developing fruit.

Use the appropriate StrongEcho tool when something looks unfamiliar:

• Identify volunteer seedlings and unknown plants with the AI Plant Identifier.
• Check yellow leaves, spots, curling, wilting, or poor growth with the AI Plant Health Identifier.
• Identify insects, eggs, larvae, and feeding damage with the AI Pest Identifier.

Start with a suitable variety, give it enough space, and make small adjustments as the plant grows.

You do not need a perfect garden to grow great tomatoes.

You can grow it.