Tomatoes are the ultimate backyard crop, and growing them is easier than you might think. These tomato growing tips should help you to take care of your most delicious plants.
Why You Should Grow Tomatoes
There are a multitude of reasons to have a backyard vegetable garden, but for many of us, the only reason we garden at all is to grow our own tomatoes. Who can blame us?
Is there anything better than a fully ripe tomato eaten while it’s still warm from the garden? Tomatoes annually rank as North America’s number one home garden crop. No vegetable (technically a fruit) has received more attention from plant breeders and seed savers, which gives us lots of varieties to choose from. After much consideration, you probably have narrowed down your choices and even planted your tomatoes.
If you haven’t planted them yet, learn how to grow tomatoes from seed and when to plant tomatoes here: Tomatoes from Seed the Easy Way.
Tomato Types: Determinate vs. Indeterminate
Tomatoes have two types of growth: determinate and indeterminate.
- Determinate tomato plants stop growing at a certain size. They tend to set and produce all their fruit at once over a 2 to 3 week period. Often called bush tomatoes, they can be planted closer together and will do well in a container.
- Indeterminate tomato plants will keep on growing and producing fruit until the plant is killed by frost. These plants get quite large and will need some kind of support. Whether you use a trellis, stakes, or cages is up to you, but supporting them is necessary to keep the plants from sprawling on the ground.
Mulching Tomato Plants
Don’t forget to mulch! It helps to conserve moisture and keeps soil-borne disease spores from being splashed up onto the plants. There are many good mulches to choose from—black plastic, straw, shredded leaves, grass clippings, or even a thick layer of newspaper. Oddly enough, red plastic has been found to increase fruiting by 12-20%. Read our Mulching Guide for more information.
Pruning Tomato Plants
To pinch or not to pinch, that is the question. Most gardeners remove some of the suckers that form between the main stalk and the side branches during the early growth of their plants. But just how much should you prune them, if at all? Pruned plants bear earlier and have larger tomatoes, but they also have fewer of them. Overpruning can cause sunscald—a yellow sunburned patch that eventually blisters. Unpruned plants yield about twice as much fruit as pruned ones do, but it will take longer for the fruit to ripen.
Note: You definitely do not want to prune determinate varieties or you will have only a few fruit clusters. Since determinates bear fruit only on the ends of their branches, never clip them off, or you won’t get any fruit at all!
Pruning also affects flavor. The more foliage a plant has, the more photosynthesis is taking place, which produces more sugars in the fruit. The excess foliage shades the fruit and insulates it from summer heat, making it ripen more slowly and improving the taste. Of course, if the foliage on your plants is so thick that no fresh air can reach the center of the plant, then by all means, pinch off a few suckers. If your indeterminates are reaching for the stars, you can top them above the highest blossoms to keep them in bounds and encourage green fruit to ripen.
Watering Tomato Plants: How Much is Enough?
Tomato plants need 1 to 2 inches of water per week. Uneven watering can set the stage for blossom-end rot and may also cause fruits to crack open. Stressed plants remove calcium from the fruit and send it to the shoots to keep the plant growing. Along with uneven moisture, excessive nitrogen and high soil acidity contribute to blossom-end rot.
Feeding Tomato Plants
Most gardeners have a secret or two up their sleeves. One man I know treats his plants to crushed eggshells in the planting hole, another uses a handful of bonemeal, and someone else swears by a pinch of Epsom salts. If you must fertilize, side-dress the plants with compost or a dose of liquid seaweed or fish emulsion. Stay away from high nitrogen fertilizers unless your plants have yellow leaves. Too much nitrogen will cause lush foliage growth but give you little or no fruit. If the leaves on your plant are purple, they are calling for more phosphorus. This is the most important nutrient for fruit production.
If all this advice seems daunting, take heart: Tomatoes are really one of the easiest vegetables to grow, and even the worst home-grown tomato tastes better than a store-bought one. For more important facts on planting and growing tomatoes, check out our Tomato Growing Guide.
Wondering what to do with your tomatoes after you’ve grown them? See our Best Tomato Recipes for inspiration.
This article was originally published in 2015 and has since been updated.