Yes, you can and should top tomato plants to get more fruit
Topping means pinching or cutting off the main stem of a tomato plant above the top set of leaves, usually when the plant is 24 to 36 inches tall. This stops the plant from growing taller and redirects its energy into growing side branches and producing fruit instead of more stem. The plant will branch out sideways, create more flowering points, and often give you a larger total harvest from a single plant.
Topping works best on indeterminate varieties—the tall, vining types that keep growing all season. Determinate varieties (the compact, bushy types bred to fruit all at once) usually don't need topping because they naturally stop growing at a set height. If you grow indeterminate tomatoes in a container or small space, topping is one of the most practical ways to keep the plant manageable while still getting plenty of fruit.
Key Takeaways
- Top indeterminate tomato plants when they reach 24 to 36 inches tall by pinching or cutting the main stem just above a set of leaves.
- Topping redirects the plant's energy from vertical growth into side branches, which produce more flowers and fruit.
- Wait until the plant has at least 6 to 8 true leaves before topping, and do it in the morning when the plant is firm and less likely to tear.
- Stop topping 4 to 6 weeks before your first expected frost so the plant has time to ripen fruit before cold weather arrives.
- Determinate varieties and cherry tomatoes often don't need topping because they naturally grow compact and bushy.
When to top your tomato plant
The best time to top is when the plant is 24 to 36 inches tall and has developed at least 6 to 8 true leaves. True leaves are the ones that look like actual tomato leaves—the first two oval-shaped leaves that emerge from the seed are cotyledons, not true leaves. Waiting until the plant is established means it has enough leaf area to recover quickly and support new growth.
Timing matters for the season too. Stop topping 4 to 6 weeks before your first expected frost date. After you top, the plant will spend energy growing new branches and flowers instead of ripening existing fruit. If you top too late in the season, new flowers won't have time to mature into ripe tomatoes before cold weather kills the plant.
Top in the morning when the plant is hydrated and the stems are firm. A turgid stem is less likely to tear or split when you pinch it. Avoid topping right after watering or during the hottest part of the day, when the plant is stressed.
How to top a tomato plant step by step
Use clean hands or sterilized pruning shears. If you use your fingers, pinch the main stem just above the topmost set of true leaves—usually about a quarter inch above the leaf node. If you use shears, make a clean cut at the same spot. Remove only the growing tip, not a long section of stem.
The plant will look odd for a few days, but within 7 to 10 days you'll see two new shoots growing from the leaf nodes just below the cut. These become your new main branches. Let them grow to the same height, then decide whether to top them again or let them grow freely. Many growers top once and then let the plant branch naturally after that.
Don't throw away the cutting—it can be rooted in water or moist soil if you want to start a new plant. Tomato cuttings root easily and will grow into a full plant in 3 to 4 weeks.
What happens after you top a tomato plant
After topping, the plant will pause its upward growth for 3 to 5 days while it recovers and redirects resources. Then two new shoots will emerge from the nodes just below the cut. These shoots will grow into full branches with their own flowers and fruit. The overall plant shape becomes bushier and wider instead of tall and thin.
The plant will produce more total flowers because it now has multiple main branches instead of one central stem. More flowers means more fruit, though individual tomatoes may be slightly smaller because the plant is sharing resources among more fruit. The trade-off is usually worth it—you get more tomatoes overall and a plant that fits better in a small space.
Which tomato varieties benefit most from topping
Indeterminate varieties like 'Brandywine', 'Cherokee Purple', 'Sungold', and 'Mortgage Lifter' grow tall and benefit most from topping. These plants can reach 6 to 8 feet or taller if left unpruned, so topping keeps them manageable and encourages branching.
Determinate varieties like 'Roma', 'San Marzano', and 'Mountain Magic' naturally grow compact and bushy, so they rarely need topping. Cherry tomato varieties vary—some are indeterminate and will sprawl, while others are determinate and stay compact. Check the seed packet or plant label to see which type you have.
If you're growing in a container, topping is especially useful for indeterminate varieties because it keeps the plant from outgrowing the pot and makes it easier to stake or cage.
Common mistakes when topping tomato plants
The most common mistake is topping too early, when the plant is still small and weak. A plant with only 3 or 4 true leaves doesn't have enough leaf area to recover quickly. Wait until the plant is at least 12 inches tall and has 6 to 8 true leaves.
Another mistake is topping too late in the season. If you top in late August or September in a cold climate, the new branches won't have time to flower and fruit before frost. Count backward from your first frost date and stop topping at least 6 weeks before.
Some growers top too aggressively, removing long sections of stem or topping multiple times in quick succession. This stresses the plant and slows growth. One or two toppings per season is usually enough. After the first topping, let the plant grow naturally unless it's getting out of hand.
Alternatives to topping if you want to control plant height
Pruning side branches (called suckers) is another way to shape the plant without stopping its upward growth. Suckers are the small shoots that grow between the main stem and branches. Removing them directs energy into the main stem and existing branches, which can increase fruit size. This method keeps the plant tall but more open and easier to harvest.
Staking or caging the plant vertically doesn't reduce growth but makes it easier to manage a tall plant in a small space. A sturdy cage or stake can support an indeterminate plant up to 6 feet tall. This approach works well if you have vertical space but limited ground space.
Choosing determinate or dwarf varieties from the start is the simplest solution if you want a compact plant. These varieties are bred to stay small and bushy without any pruning.
Frequently Asked Questions
Will topping reduce my tomato yield?
No—topping usually increases total yield because the plant produces more branches and more flowers. Individual tomatoes may be slightly smaller because the plant is supporting more fruit, but the total weight of tomatoes per plant is usually higher than an untopped plant.
Can I top determinate tomato plants?
You can, but it's not necessary. Determinate varieties naturally grow compact and bushy and are bred to produce most of their fruit within a short window. Topping them may reduce yield because you're removing growth when the plant is already at its ideal size.
What do I do with the cutting after I top the plant?
You can root it in water or moist potting soil to grow a new plant. Place the cutting in a glass of water in a bright window, and roots will appear in 7 to 14 days. Once roots are half an inch long, plant it in soil. It will grow into a full tomato plant in 3 to 4 weeks.
Is it too late to top my tomato plant if it's already flowering?
You can still top a flowering plant, but the benefit is smaller. The plant will still branch and produce more flowers, but it has less time to develop new fruit before the season ends. If frost is more than 6 weeks away, topping is still worth doing.
Do I need to seal or treat the cut after topping?
No. Tomato plants heal quickly on their own, and wound dressing or sealant is not necessary. A clean cut made in the morning will close within a few days without any treatment.