Container tomatoes
Two tomato transplants, fabric pots of at least five gallons, a bag of potting mix and a cage, on a patio or balcony with six or more hours of sun. The first summer is about deep planting, steady watering and picking ripe fruit.
What it is like
A tomato plant in a big pot is one of the easiest ways to grow food without a garden. A sunny patio, balcony or doorstep, a container at least the size of a five-gallon bucket, packaged potting soil and a young plant are enough for ripe fruit two or three months after planting.
The details matter more than the effort. The plant goes in deep, with only two or three sets of leaves above the mix, so that roots form along the buried stem. The cage goes in on day one. And because a pot holds so little soil, watering is daily in summer, sometimes twice a day.
Compact and determinate kinds suit pots best, ripening their fruit over a few weeks; tall indeterminate kinds keep going until frost but need a bigger pot and a tall cage. Cherry and grape tomatoes give small, very sweet fruit.
The common problems have plain causes: too little sun means few tomatoes, uneven watering invites blossom end rot, and too much fertilizer can burn a plant that has no garden soil to buffer it.
- A session
- A few minutes a day to water and look.
- A week
- Tie in stems and check for pests; feed every two to three weeks after the first two months.
- Season
- Plant after the last frost; pick through summer until frost.
Outdoors · Solo, With kids
Kinds and styles
Grow to a set size, ripen their fruit in a burst and then decline; easiest in pots.
Keep growing and fruiting until frost; they need a bigger pot and a tall cage or stake.
Small, very sweet fruit, often eaten fresh.
Roma or plum types with meaty flesh and few seeds, for cooking and canning.
Cascading tomatoes in baskets, a use Clemson Extension mentions for small patios.
Is it for you?
You will probably love it if
- You have a spot with six or more hours of direct sun
- You can check the pots every day in summer
- You want to eat what you grow
Maybe not, if
- Your only outdoor space is shaded most of the day
- You travel often in summer with nobody to water
- Your balcony cannot take the weight of large pots of wet soil
What to buy first
- 01Two tomato transplantsA container variety such as Patio, which stays about 2 feet tallFind it on Amazon$18
- 02A pack of fabric potsAt least the size of a five-gallon bucket, with drainageFind it on Amazon$43
- 03Potting mix, about 20 quartsLight enough for roots; garden soil is too heavy in a potFind it on Amazon$20
- 04A tomato cage or stakePut in at planting so later roots are not damagedFind it on Amazon$30
- Everything you need to beginAbout $8 a month after that$111
Typical US prices for entry-level gear, rounded. Last checked October 2026. How we get the numbers
The Amazon links open a search for that type of item, not a product chosen for us, and the prices in the list are our typical figures, or the listing of the shop a line names, not Amazon's price for any listing. If you buy through one we may earn a commission at no extra cost to you; as an Amazon Associate we earn from qualifying purchases.
What to buy next
- 01Water-soluble fertilizerThe mix's fertilizer runs out (Clemson)Find it on Amazon Eight to ten weeks after planting
- 02Drip tray or saucerCatch the water that drains throughFind it on Amazon On a balcony
- 03MulchCuts down water loss from the pot (Clemson)Find it on Amazon Midsummer
- 04Seed-starting kitSow indoors six to eight weeks before the last frost (Clemson)Find it on Amazon The next spring
No prices here on purpose: these are later buys, and what to spend depends on how far the hobby has taken you. The Amazon links work like the ones above: a search for the type of item, and a possible commission for us at no extra cost to you.
From transplant to the first ripe tomato, step by step
Tomatoes were already grown in southern Mexico by 500 BCE (Wikipedia), and today they are among the easiest crops to grow in a pot. This guide follows Clemson Cooperative Extension and the University of Georgia Extension from choosing a plant and a container through hardening off, deep planting, watering and feeding to the first ripe fruit.
Warning: Before you start Containers are heavy once the potting mix is wet, so check what a balcony can carry, and make sure water draining from the pots does not run onto a neighbour below; Clemson Extension suggests trays of coarse marble chips. Use only containers that never held anything toxic to plants or people. Do not use more than the recommended rate of any fertilizer, which can burn and kill the plant, and do not add Epsom salt unless a soil test shows a magnesium shortage. Move pots out of reflected heat on very hot days and into shelter in hail or high wind.
A determinate or compact variety for a pot; Bonnie Plants sells Patio, which grows only 2 feet tall, at $18.99 for two.
For a week before planting, give it more hours outdoors each day and water a little less, without letting it wilt (Clemson Extension).
Fill a pot at least as big as a five-gallon bucket with damp potting mix and set the plant so only two or three sets of leaves show; roots form along the buried stem.
Until water runs out of the drainage holes; check twice on hot, dry or windy days.
Flavor is best when the fruit is fully ripe on the vine but still firm.
A tomato in a pot
From the side: a fabric pot filled with potting mix, the tomato planted deep with roots growing along the buried part of the stem, a wire cage around the plant, drainage holes at the bottom of the pot with water dripping into a tray, and the sun above.
- A Cage Put in at planting Holds the stems up. Step 4 →
- B Potting mix To 1/2 in from the top Not garden soil. Step 2 →
- C Buried stem Two or three leaf sets show Roots form along it. Step 4 →
- D Drainage holes In the bottom Water until it runs out. Step 5 →
Steps 1-3Before planting
- Step 1 of 8 · Before planting
Choose the variety
For a pot, a determinate or compact kind is easiest; Bonnie Plants describes Patio as growing only 2 feet tall with 3 to 4 ounce fruit. Look for disease-resistance letters such as V and F on the label.
Most people: a compact or determinate kind (first summer).
Start here A compact or determinate kindBest forFirst summer
Smaller plant, fruit ripens together.
An indeterminate kindBest forA big pot and a tall cage
Keeps fruiting until frost.
- Step 2 of 8 · Before planting
Choose the container and mix
A pot at least as big as a five-gallon bucket with drainage holes, filled to within half an inch of the top with slightly damp packaged potting soil; garden soil is too heavy, and peat-only mixes are too light and can blow over.
- Step 3 of 8 · Before planting
Harden off
For a week before planting, give the plants more hours outdoors each day, starting in bright shade, and water a little less without letting them wilt (Clemson).
Steps 4-7Growing
- Step 4 of 8 · Growing
Plant deep and support
After the last frost, plant in the evening or on a cloudy day, so that only two or three sets of true leaves show; roots form along the buried stem. Put the cage or stake in now, while the plant is small.
- Step 5 of 8 · Growing
Water
Warning: NOTICE Big swings between wet and dry make blossom end rot more likely (Clemson).
Check every day, twice on hot, dry or windy days, and water until it runs out of the drainage holes; the mix should never be soggy.
Goes wrong: A plant that wilts every day. The pot is drying out too fast; water more often and shade the pot.
- Step 6 of 8 · Growing
Feed
A mix with fertilizer lasts eight to ten weeks; then use a water-soluble fertilizer every two to three weeks at the recommended rate, never more.
- Step 7 of 8 · Growing
Prune and protect
Pinch off suckers if you train the plant to one or two stems, move pots out of reflected heat on very hot days, and into shelter in hail or high wind.
Step 8Harvest
- Step 8 of 8 · Harvest
Harvest
Pick fruit fully ripe on the vine but still firm, usually 52 to 90 days after planting. Ripen green ones at about 70 °F rather than in the refrigerator.
Most people: pick ripe (best flavor).
Start here Pick ripeBest forBest flavor
Fully colored, still firm.
Pick green before frostBest forEnd of the season
Ripen indoors at about 70 °F; light is not needed.
In shortIf it goes wrong
- A plant that wilts every day.
- Step 5 · Water
How you get better
- SpringPlants and pots
Harden off the transplants and plant deep after the last frost.
- Early summerWater and support
Daily watering, the cage in place, the first flowers.
- SummerHarvest
Pick fully ripe fruit; start feeding after eight to ten weeks.
- Next yearMore kinds
An indeterminate variety in a bigger pot, or growing from seed.
- Choosing a variety
- Hardening off
- Planting deep
- Watering containers
- Feeding at the right rate
- Staking and caging
- Pinching suckers
- Knowing when to pick
Small things that help
- Put the cage or stake in when the plant is very small.
- Water until it runs out of the bottom, and never leave the mix soggy.
- Feel the mix every day; in heat, check twice.
- Group pots so the leaves shade the soil.
- Do not refrigerate green tomatoes; ripen them at about 70 °F (Clemson).
- Choose varieties with disease resistance letters such as V and F on the label.
Beginner mistakes
- 01A pot that is too smallUse at least a five-gallon size; small pots dry out fastest.
- 02Garden soil in the potIt is too heavy and holds too much water; use potting soil.
- 03Uneven wateringBig swings between wet and dry make blossom end rot more likely.
- 04Too much fertilizerContainers have no buffer; more than the label rate can burn the plant.
- 05Not enough sunFruiting crops need at least five to six hours of direct sun.
What a pot of tomatoes needs
From Clemson Cooperative Extension's container gardening and tomato factsheets and the University of Georgia Extension.
| Need | What it means |
|---|---|
| Pot size | At least as big as a five-gallon bucket (UGA); bigger for tall, indeterminate kinds |
| Drainage | Holes in the bottom so roots never stand in water |
| Sun | At least six hours (UGA); fruiting crops do better with eight to ten (Clemson) |
| Mix | Packaged potting soil; garden soil is too heavy and peat-only mixes too light |
| Water | Daily, even twice a day in heat; until it drains, never soggy |
| Feeding | A mix with fertilizer lasts eight to ten weeks; then a water-soluble feed every two to three weeks at the label rate |
| Temperature | Best at 70 to 80 °F by day and 60 to 70 °F at night |
| Harvest | 52 to 90 days to the first fruit, depending on the variety |
Why people quit
- 01The plant wilts every dayThe pot dries out too fast. Water more often, group pots so the leaves shade each other, and lift them off hot paving (Clemson).
- 02Black patches on the bottom of the fruitBlossom end rot comes from too little calcium reaching the fruit; big swings between wet and dry make it more likely. Water evenly.
- 03Few or no tomatoesTomatoes need at least six hours of direct sun a day (UGA); move the pot to the sunniest spot you have.
Words you will meet
- Determinate
- A tomato that grows to a set size and ripens its fruit at once.
- Indeterminate
- A tomato that keeps growing and fruiting until frost.
- Hardening off
- Getting an indoor-grown plant used to the outdoors over about a week.
- Sucker
- A side shoot between the main stem and a leaf.
- Blossom end rot
- A dark, sunken patch on the bottom of the fruit caused by too little calcium reaching it.
- Transplant
- A young plant ready to go into its pot.
Questions people ask
How big a pot do I need?
At least as big as a five-gallon bucket, with drainage holes in the bottom (University of Georgia Extension); tall, indeterminate kinds need more.
How often should I water?
Check every day and twice on hot, dry or windy days; water until it runs out of the drainage holes, but never leave the mix soggy (Clemson).
Do I need to feed the plants?
A potting mix with fertilizer added feeds them for eight to ten weeks; after that, use a water-soluble fertilizer every two to three weeks at the recommended rate (Clemson).
Why are the bottoms of my tomatoes turning black?
That is blossom end rot, a shortage of calcium in the developing fruit made worse by uneven watering (Clemson).
When will I get tomatoes?
Clemson Extension gives 52 to 90 days to the first harvest, depending on the variety.
Where to go next
- 01MicrogreensAnother edible crop, indoors and ready in days. $33 to start
- 02Worm compostingMake compost for next year's pots. $71 to start
How it compares
| Container tomatoes | Microgreens | Succulents and cacti | Oyster mushrooms | |
|---|---|---|---|---|
| Start cost | $111 | $33 | $37 | $20 |
| Each month | $8 | $8 | $4 | $10 |
| Space | A sunny patio, balcony or doorstep | A windowsill | A windowsill | A kitchen counter |
| Noise | Quiet | Quiet | Quiet | Quiet |
| First result | First ripe fruit 52 to 90 days after planting | 8 to 12 days | Same day | 2 to 3 weeks |
| Mess | Potting mix and water run-off | Soil and water | A little soil | A little spore dust |
Where to learn more
- 01Clemson Extension HGIC: Container vegetable gardeningContainers, mix, watering and feeding.
- 02Clemson Extension HGIC: TomatoHardening off, planting, staking, varieties and harvest.
- 03Clemson Extension HGIC: Tomato diseases and disordersBlossom end rot and how to prevent it.
Sources: Clemson Cooperative Extension HGIC: Container vegetable gardening · Clemson Cooperative Extension HGIC: Tomato · Clemson Cooperative Extension HGIC: Tomato diseases and disorders · University of Georgia CAES: Better tomatoes start with good growing practices · Bonnie Plants: Patio Tomato (2 pack) · Wikipedia, Tomato
Researched and written by the Fjords Team.