Should You Remove Tomato Suckers
I get asked this question every summer from neighbors and readers: should you remove tomato suckers? The short answer is: it depends. But as a gardener who’s grown everything from compact patio tomatoes to sprawling heirloom indeterminates, I’ll walk you through exactly when to pinch them, when to leave them, and how your choice affects yield, plant health, and harvest ease.
What are tomato suckers?
Tomato suckers are the small shoots that appear in the angle between the main stem and a leaf stem. They look like mini-stems and will develop leaves, flowers, and eventually fruit if left alone. They’re a natural part of tomato growth, not a disease or pest.
“Suckers are plants’ way of expanding — whether you want them to or not.”
Why gardeners remove suckers
From my own gardens, I’ve found a few consistent reasons people remove suckers:
- Improved air circulation and disease reduction, especially in humid climates.
- Redirected energy into fewer fruiting stems, producing larger fruit on indeterminate plants.
- Better access to fruit for harvesting and easier staking or trellising.
- Controlled plant size in small spaces or containers.
In one season I trained an indeterminate variety to a single leader and harvested larger, uniformly ripened beefsteak tomatoes. Removing suckers helped concentrate the plant’s resources and made pruning and harvesting much simpler.
When you should remove suckers
There are clear situations when I recommend removing suckers:
- Indeterminate varieties — These keep growing all season and can become huge. Removing suckers helps manage vigor and improves fruit quality.
- Crowded or humid gardens — If rows are close or air doesn’t move well, removing suckers reduces foliage density and risk of blight and fungal issues.
- Trellised or staked plants — For plants trained to a single stem up a stake or trellis, pinch out lower suckers to keep one strong leader.
- When you want larger fruit — Removing some suckers can shift the plant’s energy into fewer fruits, increasing their size.
When not to remove suckers
There are also times when leaving suckers is the better choice:
- Determinate varieties — These are bred to stop growing after reaching a set size. Removing suckers can reduce total yield because determinate plants rely on multiple stems for fruiting.
- Short growing seasons — If you need every possible fruit quickly, leaving suckers can increase total harvest early in the season.
- Low-maintenance plantings — If you prefer a hands-off approach and you’re growing smaller types or in a disease-free environment, let nature run.
- Greenhouse or protected environments — In well-ventilated, controlled conditions, you may not need to prune heavily.
How to remove tomato suckers — a simple, practical approach
I always recommend a gentle, consistent method. Here’s what works for me and many backyard gardeners:
- Inspect plants every few days. Suckers are easiest to pinch when small (under 2–3 inches).
- Use your thumb and forefinger to pinch off tiny suckers. For larger ones, use clean pruning shears to avoid tearing.
- Prune in the morning when plants are turgid — they heal faster.
- Remove only what you need. Aim for good airflow and manageable structure, not a bare skeleton.
Timing and frequency
Pinch early and often. Small suckers come off cleanly and with minimal stress to the plant. I check my tomatoes twice a week during active growth and after heavy rains when plants push new growth.
Special techniques and alternatives
If you don’t like constant pinching, try these alternatives:
- Prune to a two- or three-stem system by selecting a couple of strong suckers to keep and removing the rest.
- Top the plant in late summer if you want to halt growth and encourage ripening.
- Use a tomato cage and let growth proceed naturally — cages can handle many suckers but may produce a denser canopy.
Common mistakes to avoid
I’ve made a few mistakes over the years, so learn from my experience:
- Don’t over-prune — removing too many leaves reduces photosynthesis and can lower yields.
- Avoid pruning wet plants to minimize disease spread.
- Don’t remove suckers from determinate varieties unless you know the cultivar responds well to pruning.
- Don’t yank large suckers abruptly — a clean cut is better than tearing the stem.
Personal take: what I do in my garden
I grow both determinate and indeterminate tomatoes. For indeterminates, I usually train to one or two leaders and remove most suckers up to about knee height, leaving a bit of lower foliage for nitrogen fixation and sun protection. For determinate types, I leave them mostly alone unless a sucker is creating a dense tangle that will block air or make harvesting impossible. This balanced approach has given me healthy plants and dependable harvests year after year.
Final verdict
So, should you remove tomato suckers? Yes, sometimes. It depends on the variety, the space you have, your climate, and the results you want. Removing suckers is a useful tool to improve airflow, control size, and increase fruit size on indeterminate tomatoes. But for determinate varieties or when you want maximum total yield with minimal fuss, leave them alone.
Try this: decide what you want from each plant — more fruit, bigger fruit, or lower maintenance — and prune selectively. In my experience, a thoughtful, moderate approach gives the best balance between productivity and plant health.
Happy growing — and don’t be afraid to experiment a little. Gardening teaches you more each season than any book can.
