GrowSabzHow to grow tomato in pots
Also called tamaatar, timatar, tamatar, tomate · Solanum lycopersicum
ٹماٹر
- ☀️ Sunlight
- 6–8hours daily
- 💧 Water
- 1.4 Levery 2 days, 15 L pot
- 🌡️ Ideal temp
- 18–29°C
- 🪴 Min pot
- 15 L30 cm deep
- 🧺 Harvest
- 60–85days from sowing
- ⚖️ Yield
- 4 kgper 20 L pot
Tomato drinks far more than most container plants — about 800 ml for every 10 litres of soil, and in hot weather it wants that every single day. Underestimate that and you get the classic result: a plant that looks healthy in the morning and wilts by afternoon.
Short answer
Grow tomato in a 15 litre container at least 30 cm deep, watering about 800 ml per 10 litres of soil every 2 days, and keep temperatures between 18 and 29 °C. First harvest comes 60–85 days after sowing.
Where to plant it
What size pot does tomato need?
15 litres and 30 cm deep is the realistic minimum for a single plant. Pick a container below to see what changes.
| Container | Minimum size | Depth | Notes |
|---|---|---|---|
| Pot | 15 L | 30 cm | Use pots with drainage |
| Grow bag | 15 L | 30 cm | Fabric breathes well |
| Open ground | — | 40 cm | Space well |
| Raised bed | 30 L | 35 cm | Deep soil helps root development |
Watering
How often should you water tomato?
Every 2 days through the growing season, at about 800 ml per 10 litres of soil — daily in hot weather, every 3 days when it turns cool. Water in the early morning. Deep root watering works best.
Too little water
- drooping leaves
- leaf curling
- flower drop
- small fruits
Too much water
- yellow lower leaves
- soft stem
- fungus smell
- root rot
Avoid: water on leaves; standing water; shallow frequent watering.
Climate
Can you grow tomato where you live?
No hardiness zone needed — compare your actual temperatures against the plant's own limits.
| Ideal range | 18 – 29 °C |
|---|---|
| Survives | 10 – 38 °C |
| Germinates above | 16 °C — best at 24 °C, about 8 days |
| Flowers drop | above 35 °C, or below 15 °C |
| Sunlight | 6–12 hrs/day, best 8 |
| Frost | Highly sensitive — will not survive it |
The flower-drop thresholds matter more than the survival ones. A plant can be perfectly alive at 38 °C and still give you nothing.
How cold is too cold for tomato? Check your temperaturesEnter your night low and day high — see if it survives, and if it will cropTimeline
Tomato growing stages, day by day
Click any stage to see what's happening. Durations shift with temperature — a warm season runs roughly a quarter faster than a cool one.
Feeding
Fertiliser schedule for tomato
Feed on the interval below, changing what you give as the plant shifts from making leaves to making fruit.
| Stage | What to use | Per 10 L | Every |
|---|
How to prepare each feed
Common mistakes
Why tomato fails, and how to avoid it
- A container that is too small
Below 15 litres the root run is too shallow. The plant grows, flowers late, and drops whatever it sets because it cannot support the crop.
- Watering too lightly
A daily splash wets the top few centimetres and nothing else. Tomato wants about 800 ml per 10 litres of soil — one deep soak beats three shallow ones.
- Wetting the leaves
Overhead watering in the evening leaves foliage damp overnight, which is exactly the condition fungal disease needs. Water the soil, early in the day.
- Ignoring the flower-drop threshold
Above 35 °C, or below 15 °C, flowers fall before setting. The plant can look perfectly healthy and still give you nothing — shade it through the hottest hours.
- Planting it beside Potato
Shares the same blight diseases and insects (like Colorado potato beetle), and heavily competes for nutrients.
- Leaving it out through a cold snap
Tomato is highly frost-sensitive. One night below 10 °C can end the plant outright — bring containers in or cover them.
Companions
What to plant with tomato
Good neighbours
Repels pests like tomato hornworms, reduces mosquitoes, and may improve the flavor and growth of the tomatoes.
Roots produce a chemical that kills root-knot nematodes, and flowers repel other harmful insects.
Attracts beneficial pollinators like bees, and is known to repel the tomato hornworm.
Emits a strong scent that deters spider mites, aphids, and other common pests.
Shatters the soil and aerates it, allowing water and air to better reach the deep roots of the tomato plant.
Keep apart from
Shares the same blight diseases and insects (like Colorado potato beetle), and heavily competes for nutrients.
Attracts the tomato fruitworm (also known as the corn earworm), which can devastate the tomato harvest.
All members of the brassica family (cabbage, broccoli, kale) severely stunt the growth of tomato plants.
Produces substances from its roots that inhibit the growth of tomatoes and many other vegetables.
Releases juglone, a chemical highly toxic to the nightshade family, causing fatal walnut wilt in tomatoes.
Problems
Tomato pests and diseases
Each lists the weather that brings it on, so you know when to start checking rather than reacting once it's established.
Early Blight humidity >80% · temp 15-25
Starts as small, dark spots with concentric rings on older leaves. Can lead to significant defoliation and reduced fruit yield.
Late Blight humidity >80% · temp 15-25
Causes rapidly spreading, large, dark water-soaked spots on leaves and stems, and firm, dark brown decay on fruits. Devastating in cool, wet weather.
Bacterial Spot humidity >85% · temp 24-30
Small, dark, water-soaked spots on leaves that may dry up and fall out (shot-hole). Spots on fruits appear as scabby lesions.
Powdery Mildew humidity 50-70% · temp 20-27
White, powdery fungal spots appear mainly on the upper surface of leaves. Causes leaves to yellow and die off prematurely.
Spider Mites humidity <50% · temp >27
Tiny pests that cause leaves to look stippled, pale, and eventually turn yellow and drop. Fine webbing may be visible.
Blossom End Rot humidity any · temp any
A dark, sunken, leathery patch appears at the bottom (blossom end) of the fruit. Caused by calcium deficiency, often due to uneven watering.
Tomato Hornworm humidity any · temp >20
Large green caterpillars with a horn on their tail. They blend in perfectly and can eat entire leaves and small stems very quickly.
Leaf Curl humidity any · temp >30
Leaves roll upward and inward, often due to environmental stress like excessive heat, uneven watering, or viral infections spread by whiteflies.
Aphids humidity any · temp 15-25
Small, soft-bodied insects that cluster on new growth and the undersides of leaves, sucking sap and secreting sticky honeydew.
Whiteflies humidity >60% · temp >25
Tiny, white, winged insects that fly up when the plant is disturbed. They suck sap, weaken the plant, and can transmit viruses.
Flower Drop humidity any · temp >35 or <15
Flowers dry up and fall off before fruit sets, commonly caused by temperature extremes (too hot or too cold) or severe water stress.
Harvest
When to harvest tomato
First picking falls between day 60 and day 85, and the plant then keeps producing for about 30 days. Pick often — what you leave on the plant signals it to stop making more.
How to tell it's ready
- Full color
How much to expect
Storing it: Room temp
Questions
Tomato: common questions
How long does tomato take to grow?
About 90 days from sowing to the first harvest, with picking usually starting between day 60 and day 85. It then keeps producing for roughly 30 more days. Warm weather pulls that forward; cool weather pushes it back.
What size pot does tomato need?
At least 15 litres and 30 cm deep for one plant. A raised bed wants 30 litres of soil and 35 cm of depth.
How often should I water tomato?
About 800 ml per 10 litres of soil, every 2 days in normal weather — daily when it is hot and every 3 days when cool. Water in the early morning.
What temperature does tomato need?
It does best between 18 °C and 29 °C and survives from 10 °C to 38 °C. Seed needs soil above 16 °C to germinate, ideally around 24 °C.
Can I grow tomato in winter?
Not outdoors anywhere that frosts — it is highly frost-sensitive and will not survive it. In a frost-free winter it grows slowly; anywhere colder, treat it as a warm-season crop.
How do I know when tomato is ready to harvest?
Full color. Once picked: room temp
How much does one tomato plant produce?
Roughly 4 kg from a 20 litre container, or about 8 kg in open ground. Larger containers give proportionally more, up to a point.