Staking tomatoes keeps them off the soil and makes harvesting easier
A stake or cage holds a tomato plant upright so the fruit doesn't rest on wet soil, where it rots. It also keeps the plant from sprawling across your bed and shading neighbouring plants. In a raised bed where space is tight, staking is nearly essential—it lets you fit more plants and reach them without stepping over vines.
The best time to stake is when you plant the seedling, before the stem gets thick and brittle. If you wait until the plant is already flopping, you risk breaking branches when you tie them up. A stake or cage installed at planting time guides the plant as it grows instead of forcing it into shape later.
Key Takeaways
- Install a stake or cage at planting time, not weeks later, to avoid damaging the stem and branches.
- Determinate (bush) tomatoes need a cage or short stake; indeterminate (vining) tomatoes need a tall stake or string system that you can extend as they grow.
- Tie the plant loosely to the stake with soft material—cloth strips, twine, or plant tape—so the stem can thicken without being strangled.
- Check ties every two weeks and loosen them as the plant grows; a tie that fit in June will cut into the stem by August.
Determinate versus indeterminate: which type of tomato you have matters
Determinate tomatoes (also called bush tomatoes) grow to a fixed height—usually 3 to 4 feet—and stop. They produce most of their fruit in a short window, then decline. These plants work well with a cage: a standard 5-foot cage is taller than they'll grow, and the cage supports the weight of fruit without you having to tie anything.
Indeterminate tomatoes (vining types) keep growing taller all season until frost kills them. They can reach 6, 8, or even 10 feet. A cage is useless for these because the plant will outgrow it by mid-July. Instead, use a tall stake—a 6-foot or 8-foot wooden stake, metal rod, or sturdy bamboo pole—and tie the main stem to it as it grows. Some gardeners use string systems instead, running twine from the top of a frame down to the base of each plant and wrapping the stem around the twine as it climbs.
Check your seed packet or plant label to see which type you have. If it says "determinate" or "bush", a cage will work. If it says "indeterminate" or "vining", plan for a tall stake or string system.
Choosing between cages, stakes, and string systems
Cages are the easiest option if you have determinate tomatoes. A standard tomato cage is 5 feet tall and made of wire or sturdy plastic. You straightforward push it into the soil at planting time and let the plant grow through it. The cage holds the branches and fruit without any tying. The downside: cages take up horizontal space in a raised bed, and they're not tall enough for indeterminate varieties.
Single stakes work for both types but require tying. Drive a 6-foot or 8-foot stake (wood, bamboo, or metal) into the soil next to the plant at planting time. As the plant grows, tie the main stem to the stake every 12 inches or so using soft ties. This method uses less horizontal space than a cage and works for tall plants, but it takes more labour—you have to check and adjust ties regularly.
String or twine systems are popular in commercial greenhouses and work well in raised beds if you have a frame to attach them to. Run a horizontal wire or rope across the top of your bed frame, then hang twine down to each plant. As the plant grows, gently wrap the stem around the twine. This method is labour-intensive but very space-efficient and distributes the plant's weight evenly. It works best if your raised bed has a sturdy wooden frame you can attach to.
How to install a stake or cage at planting time
Push the stake or cage into the soil before you plant the seedling. If you drive it in after planting, you risk hitting the root ball and damaging the plant. For a stake, push it at least 12 inches into the soil so it won't wobble in wind. For a cage, push all four or six legs at least 6 inches deep.
Position the stake or cage about 2 inches away from where the seedling will sit. You want the plant close enough that you can tie it easily, but far enough that the stake doesn't touch the stem directly—contact with the stake can cause the stem to rub and split.
If your raised bed is less than 12 inches deep, a stake may not go deep enough to be stable. In that case, use a cage (which has shorter legs) or anchor the stake to the bed frame with a bracket or tie-down.
Tying the plant without strangling it
Use soft material that won't cut into the stem as it thickens. Good options include cloth strips (old t-shirts work), plant tape, soft twine, or commercial plant ties with a plastic spacer. Avoid wire, thin string, or anything that will dig in as the stem grows.
Make a loose figure-eight loop: bring the tie around the stake first, then cross it over and bring it around the stem. This creates a buffer between the stem and the stake so the stem can move slightly in the wind without rubbing. Tie it snug enough that the plant won't slip, but loose enough that you can slide your finger under the tie.
Tie the main stem to the stake every 12 inches as the plant grows. For indeterminate varieties, you'll be adding new ties throughout the season. For determinate varieties in a cage, you usually don't need to tie anything—the cage holds the branches.
Checking and adjusting ties as the plant grows
Visit your tomatoes every two weeks and check each tie. As the stem thickens, a tie that was loose in June will become tight by August. A tie that's too tight will cut off the flow of water and nutrients, causing the plant to wilt or the fruit above the tie to stop growing.
If a tie is tight, loosen it or replace it with a longer piece of material. If the plant has grown taller and you're using a single stake, add a new tie higher up the stem. For indeterminate varieties, keep tying as the plant grows—don't assume it will stop at a certain height.
Watch for ties that have slipped down the stem or come loose. Wind and the weight of fruit can shift them. A loose tie won't support the plant, and you'll end up with branches breaking under the weight of tomatoes.
Pruning suckers to make staking easier
Indeterminate tomatoes grow suckers—shoots that sprout in the angle between the main stem and a branch. If you leave them, they become full branches with their own fruit, and the plant becomes a tangled mess that's hard to tie and support. Pinching off suckers when they're small (1 to 2 inches) keeps the plant to a single main stem or a few main stems, which is much easier to stake and tie.
Determinate tomatoes produce fewer suckers and don't need as much pruning. If you're using a cage, you can leave the suckers alone—the cage will support them.
Pinch suckers off by hand or with a knife. Do it in the morning when the plant is firm, not in the heat of the day when it's limp and more likely to tear. Pinching off suckers also directs the plant's energy into fruit instead of foliage, so you'll get more tomatoes.
Frequently Asked Questions
Can I stake a tomato after it's already flopping over?
Yes, but carefully. Drive the stake into the soil at an angle so it doesn't hit the root ball, then gently tie the stem to it. You may break a branch or two, but the plant will usually survive. It's better to do this than to leave it on the ground where it will rot. Going forward, stake at planting time to avoid the problem.
What's the difference between a tomato cage and a stake?
A cage is a freestanding wire or plastic structure that you push into the soil; the plant grows through it and the cage holds the branches. A stake is a single pole you tie the plant to. Cages are easier but take up more space and don't work for tall plants. Stakes are more work but space-efficient and support plants of any height.
How tight should the tie be?
Loose enough that you can slide your finger under it, but snug enough that the plant won't slip or rotate on the stake. The tie should hold the stem in place without pressing into it. As the stem thickens, loosen the tie or replace it so it doesn't cut off the plant's circulation.
Do I need to stake cherry tomatoes?
It depends on the variety. Determinate cherry tomatoes (bush types) usually don't need staking if you use a cage. Indeterminate cherry tomatoes (vining types) grow very tall and produce a lot of fruit, so they need a tall stake or string system to keep the branches from breaking under the weight.
Can I use a tomato cage for an indeterminate tomato?
Not effectively. Indeterminate tomatoes grow taller than any standard cage, and by mid-summer the plant will be growing above the cage with nothing to support it. The top-heavy plant will topple. Use a tall stake or string system instead.