14 Top Tomato Growing Tips for the Ultimate Crop

Whether you're new to gardening or an old pro looking for secrets, learn to make the most of your veggie crop with these tomato growing tips.

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Top 10 Tomato Growing Tips

In terms of popularity, it’s no contest: Tomatoes are the rock stars of veggies. More than 35 million gardeners plant tomatoes each year! Even if you’re new to gardening, it’s easy to make your backyard the neighborhood Tomatoville with our top tomato growing tips!

1. Start Tomatoes From Seeds

Buying and setting out transplants is the easiest tomato growing tip. But to explore the many distinctive varieties available, start seeds indoors. Six to eight weeks before the last frost, sow seeds in pots filled with seed-starting or potting mix. When the seedlings sprout two sets of leaves, transplant them into bigger containers.

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2. Seek the Heat and Protect Tomatoes from Cold

Seedlings need lots of light and heat. Put them in a sunny window, or 4 to 6 inches under an artificial light, to encourage stout stems. To prepare for transplanting, set them outside for a few hours daily in early spring. When temperatures stay above 55, it’s time to plant.

Tuck tomatoes in at night with a cloche or other cover to protect them from frosty temps. Try a cold frame (for seedlings), tunnel row covers (once plants are in the ground), water barriers, or an old cloth or plastic tarp. If exposed to 32 degrees, these plants will likely die, so shelter is key! Psst—here’s how to find the first and last frost dates.

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3. Plant Tomatoes in Full Sun

Set yourself up for success by making sure tomatoes are planted in a space that receives a lot of direct sunlight. “They can get by with six hours of sun but, ideally, eight hours or more is best,” says Diane Blazek, executive director of the National Garden Bureau. “Less than eight hours of sunlight results in fewer and smaller fruits.” Warm weather is important, too.

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4. Show Your Support

To help keep your tomatoes clean and disease-free, provide plenty of support with stakes, trellises or cages. Vining (also known as “indeterminate”) tomatoes will grow until killed by frost. Keep them off the ground with at least a 5- to 8-foot-tall cage or a trellis. Bush varieties (known as “determinate” tomatoes) are especially good choices for containers or small spaces. Use small stakes or cages.

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5. Try the Trench Method

Dig a 4-inch hole that’s as long as the plant is high. Pluck lower leaves off the stem, then place the plant in the trench horizontally, filling the trench with soil but keeping the remaining leaves above ground. “Planting horizontally in a trench or simply planting deeper in the soil allows the stem to shoot out new roots, giving the plant a sturdier base,” Diane says. This method is ideal for large indeterminate tomatoes that develop heavy vines and fruits. The tomato growing tip also promotes speedy, healthy growth, because the plant grows toward the sun and the developing roots are buried shallowly to stay warm. Just make sure to water deeply.

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Tomato growing tipshdagli/Getty Images

6. Know Your Dirt

Tomatoes grow well in soils with a slightly acidic pH level of 5.8 to 7, but they adapt nicely to slightly alkaline soils, too. If your soil is sandy or claylike, work in 2 to 3 inches of compost. Have your soil tested and follow the recommendations for best results.

7. Quench Their Thirst

The best tomato growing tip is consistent watering. This helps prevent leaf-end roll, blossom-end rot and “cat facing”—those misshapen cracks you sometimes see on the stem end of the fruit. Give tomatoes at least an inch of water a week. Water in the morning to help prevent disease and leaf burn. And don’t water the leaves. As long as the plant continues to fruit, water deeply and thoroughly during dry periods. 

8. Mulch Tomatoes

Mulch keeps soil moist, protects low-growing tomatoes from resting on the ground and helps prevent potentially disease-spreading soil from splashing onto the foliage during a good rain. It also controls weeds and keeps the soil cool. Use organic mulches, such as fall leaves, straw or marsh hay, or herbicide-free grass clippings. As these materials break down, they enrich the soil and improve its structure.

9. Remove Suckers

If you train tomatoes on a single stake for support, keep removing the suckers, those little shoots that appear in the crotch between the stem and branches. Suckers turn into fruiting stems, which lead to an even larger plant that’s hard to contain to a single stake. Removing them will give you fewer but earlier fruits. If you use tomato cages or let plants sprawl on the ground, leave the suckers on for a more fruitful harvest. And always keep the leaves, which produce the nutrients that make tomatoes delicious.

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10. Ripen Tomatoes on the Vine

Be patient and wait until tomatoes are fully ripened and at their deepest color before harvesting. (Once the fruit is removed, its sugar supply is cut off.) Gently twist the fruit so the stem separates easily from the vine.

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Red and Green Organic Tomatoes on theVine2ndLookGraphics/Getty Images
Red and green tomatoes on the vine

11. Remove Flowers in Fall

About a month before the first frost, pluck new flower clusters off tomato plants to direct energy into already-set fruits.

12. Pick Tomatoes Before Frost

Before the first frost pays your garden a visit, pluck any remaining green tomatoes and place them on a windowsill or counter. If the tomato is in a warm spot, the fruit will ripen faster; a cooler location will slow ripening. Although the flavor won’t match vine-ripened, it will stretch your harvest a little more.

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13. Do Not Refrigerate Tomatoes

You can store ripe tomatoes at room temperature for a few days. But taste-lovers beware: If kept in temperatures below 55 degrees, tomatoes lose their flavor. You want to keep ripe tomatoes cozy instead of cool. Store on a kitchen counter for a better-tasting bite. “Never store tomatoes in the fridge!” Diane says. “Refrigeration changes the taste and texture of tomatoes. Keep them at room temperature and use them as soon as they ripen.”

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14. Plant Plenty of Tomatoes

A standard tomato growing tip says you’ll need two tomato plants for every tomato eater in your household. But if you plan on canning, four per person is a better bet. In either case, there’s plenty of good taste in store!

Jill Staake
Jill lives in Tampa, Florida, and writes about gardening, butterflies, outdoor projects and birding. When she's not gardening, you'll find her reading, traveling and happily digging her toes into the sand on the beach.