Growing Tomato Plants in Containers (2024)

Enthusiastic gardeners know the story well: the garden is completely planted — but wouldn’t it be nice to grow just another tomato variety or two? You always have room for another when you plant those last few tomatoes in pots.

Tomatoes thrive in pots, and you’re giving them just the conditions they need when you plant them in early summer. Warm days, warm nights, and warm soil stimulate growth. Small tomato plants set out in pots at the beginning of the summer will grow quickly and produce prodigiously.

All kinds of tomatoes are appropriate for pots, as long as the pots are of good size. Kansas City master gardener Kathy Hoggard recommends pots at least 20 inches across the top and 24 inches deep for tomatoes. Plastic pots are fine, Hoggard says: terra-cotta pots are beautiful but lose moisture through the clay’s pore; pots made of plastic (and other artificial materials) will not dry out as quickly as clay.

Find a spot that receives 6-8 hours of sun a day. Morning sun is better than afternoon sun, Hoggard says, but, in mild areas, sun in the afternoon is not as brutal as it is in the midwest. Good air circulation is important, but choose a place protected from high winds. Protecting plants from the wind also helps keep them from drying out.

Potting mixes drain well and retain moisture. Hoggard likes to mix compost into purchased potting mix, to add nutrients, and, for a further boost, she adds organic fertilizer when she plants.

Hoggard suggests planting just one tomato plant in each pot for best results. Fit each pot with a sturdy cage to support the plant. ‘Mighty Sweet’ grape tomato and other determinate varieties will produce a prolific crop; indeterminate tomatoes such as ‘Fourth of July’ bear fruit early and continue to set fruit all summer long; pruning large plants back will keep them in scale with your pots.

At planting time, there will be room for a few marigold plants and couple of small basil plants in each pot. The flowers and herbs will flourish until the tomato plant takes over the space. Or poke nasturtium seeds into the soil around the edge of the pot; they will come up, tumble over the sides of the pot, and bloom all summer long.

Hoggard recommends watering thoroughly when the soil is dry —in the heat of summer, she sometimes waters tomatoes in pots twice a day. She also fertilizes every week with a weak seaweed or fish emulsion fertilizer. Since the plants are close at hand on her patio, taking care of them isn’t a lot of work: and cherry tomatoes, especially, are so tempting that they usually don’t even make it into the kitchen. She eats them right off the plant.

Growing Tomato Plants in Containers (1)

Growing Tomato Plants in Containers (2024)

FAQs

Should I water tomatoes in pots every day? ›

Should you water tomatoes in containers every single day? Tomatoes should stay in consistently moist soil, but the soil should not get soggy. You will likely need to water every day, but if it has rained heavily in the past 24 hours, it may not be necessary.

How big of a container does a tomato plant need? ›

Specific advice for tomatoes in containers. Use at least a 14" pot, larger is better. We've used up to 20" pots and the plants responded by getting larger and producing more fruit. Larger pots also hold more root mass and water which helps a lot as the days get hot and plants grow large with large water demands.

What is the secret to growing tomatoes? ›

Like many vegetables, tomatoes prefer a goldilocks soil that is moisture retentive yet well drained and, of course, rich in nutrients. The very best way to achieve that is simply to add plenty of well-rotted organic matter to the surface of your soil in the weeks or months before planting.

Is it better to water tomatoes in the morning or afternoon? ›

TOMATO WATERING TIPS

Water in the morning to the keep the soil moist through the heat of the day. Always water at the base of the plant — watering from above invites disease. Check tomatoes growing in pots often since they dry out quickly. Be consistent — fluctuations in water supply lead to cracking and blossom end ...

Can tomatoes get too much sun? ›

Tomatoes need plenty of sunlight to produce fruit, typically around six to eight hours a day. Too much sun and heat can cause tomatoes to get sunscald. “Sunscald happens when the tomatoes are hit with the direct waves of the sun without any protection, similar to sunburn on us humans,” says Key.

Do tomatoes prefer deep or wide pots? ›

Containers should be at least 5 gallons or 12 inches wide and deep, though bigger is better.

How many tomato plants can I put in a 5 gallon bucket? ›

You could even use a larger can as long as you provide each plant with 5 gallons of water per week. For instance if you use a 5 gallon bucket and plant 2 tomato plants around it you fill the 5 gallon bucket 2 times per week. Or a 13 gallon can filled twice yields 26 gallons, so you could plant up to 5 plants around it.

What can tomatoes not be planted with? ›

As you plan your garden this season, avoid planting the following crops near your tomatoes to keep the plants as prolific and healthy as possible.
  • 01 of 10. Potatoes. Scott Little. ...
  • 02 of 10. Corn. Bob Stefko. ...
  • 03 of 10. Eggplant. ...
  • 04 of 10. Ground Cherry. ...
  • 05 of 10. Large Brassicas. ...
  • 06 of 10. Rosemary. ...
  • 07 of 10. Cucumbers. ...
  • 08 of 10. Fennel.
Apr 17, 2024

What does Epsom salt do for growing tomatoes? ›

Common Reasons for Using Epsom Salt for Tomatoes

Epsom salt is usually recommended as a fertilizer for planting, in a foliar spray to correct yellowing leaves, and to prevent or correct blossom end rot. Let's look at each reason for using Epsom salt.

Do tomatoes plants like coffee grounds? ›

Coffee grounds are packed with nutrients that tomato plants love, like nitrogen, potassium, and phosphorus. They help improve soil structure and promote microbial activity, which can lead to healthier, more robust tomato plants. Plus, they may even help deter certain pests.

Which is the best month to plant tomatoes? ›

Tomatoes are a summer-season vegetable and are usually grown as summer annuals. Tomato seeds must be started indoors between March to June. Here's how to grow tomatoes in your pot garden.

How often should I water tomatoes in pots? ›

Water potted tomato plants daily at the soil level. You'll know you've watered enough when the water trickles through the pot's drainage holes. A mature tomato plant in a pot uses a gallon of water daily but you may need to hydrate the plant twice a day in hot, dry conditions.

How deep do containers need to be for tomatoes? ›

Use large pots to grow tomatoes. You can use a 5-gallon pot that is 10 to 12 inches deep for a single plant of determinate variety, for an indeterminate type choose a bigger container. The container should be deep, at least, 12 inches is necessary. Caging needs more space so instead of it, support tomatoes by stacking.

What do you mix with tomato soil for pots? ›

The recipe calls for 4 cups of soy meal and 2 cups of blood meal for nitrogen; 3 cups of bone meal for phosphorous; 2 cups of kelp meal and 4 cups of greensand for potassium. This homemade blend provides slow-release nutrition. We add 2 cups to each 40-quart bag of potting mix.

Can you overwater potted tomatoes? ›

Excessive watering can result in diseased plants and rotten tomatoes. But not watering often enough may weaken plants and give you small, mealy fruit. The trick is to pay attention to your soil and the cues your plants give you so you can grow armloads of delicious, juicy tomatoes.

Should I water my tomato plants everyday in hot weather? ›

In areas with sandy, fast-draining soil, like parts of the Southwest, South Florida, and Coastal South, you may need to water plants daily or even twice a day during the hottest days of summer. No matter where you live, drip irrigation is probably the best, most economical watering option.

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