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Removing selected suckers from indeterminate tomato plants may help fruit mature sooner, but it does not reliably produce ripe tomatoes a set number of weeks earlier. The trade-off can be a smaller crop, and determinate tomatoes generally need much less pruning.
What the tomato “trick” is—and what it can do
A sucker is a side shoot that grows in the angle where a tomato leaf meets the main stem. On indeterminate plants, removing some suckers is a way to train the plant to fewer stems. A less crowded plant may have less fruit shading, and university extension guidance describes quicker fruit maturation as a possible benefit of pruning. The size of that effect is not established as a general number of weeks for home gardens.
Pruning is not a shortcut that overrides variety, weather, sunlight, or growing conditions. The University of Wisconsin–Madison Division of Extension discusses earlier maturation as a potential benefit, while University of Vermont Extension and Oregon State University Extension offer similarly qualified guidance. None promises a fixed harvest advance for all tomato plants.
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Check the plant type before removing shoots
Indeterminate tomatoes
Indeterminate plants continue growing and producing along the season. Selective sucker removal can keep them to a chosen number of stems and make them easier to train on a stake or trellis. Oregon State Extension’s short-season guidance recommends inspecting indeterminate plants every 7 to 10 days and pinching side shoots as they emerge. That interval is a maintenance recommendation, not a prediction of how much earlier fruit will ripen.
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Determinate tomatoes
Determinate plants grow to a more limited size and set much of their crop over a shorter period. They generally should not be pruned like indeterminate plants: removing too many shoots can remove potential fruiting growth. University of Vermont Extension recommends limited pruning, such as removing lower leaves that touch the soil.
How to remove suckers without stripping the plant
- Identify the main stem and leaf joints. Look for a small shoot growing in the angle between a leaf stalk and the stem.
- Choose which stems to keep. Remove only the extra suckers you do not want for your training plan; avoid treating every leaf or shoot as expendable.
- Pinch small shoots or cut larger ones. Small suckers can be pinched off with your fingers. For larger shoots or deliberate cuts, use clean, sharp scissors or pruning shears.
- Keep enough foliage around the fruit. Leaves make sugars and shade fruit. Vermont Extension notes that leaves above and below fruit clusters provide shade and supply sugars; excessive pruning can leave fruit exposed.
- Stop before the first harvest approaches. Wisconsin Extension advises stopping pruning one to two weeks before expected first harvest so the plant can develop a canopy that helps protect fruit from sunscald.
Clean tools are sensible when making cuts, but buying shears does not make tomatoes ripen sooner. For small shoots, fingers may be all you need.
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Choose between a single leader and a larger crop
How much you prune affects the balance between earlier fruit and total yield. UC IPM says plants trained to one leader bear earlier but yield less overall. A severe pruning approach can also expose fruit and reduce the plant’s productive foliage.
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1Clear out junk files and repair common Windows errors2Scan for outdated or missing drivers - takes under a minute3Repair Windows errors before they cause bigger problems| Training choice | Likely advantage | Trade-off |
|---|---|---|
| One leader | Earlier bearing and a more manageable trained plant, according to UC IPM. | Lower overall yield, according to UC IPM. |
| More stems | Retains more growth that can support a larger crop. | Can make an indeterminate plant denser and harder to manage; the cited sources do not quantify a harvest-time difference for every stem count. |
An Oregon State report on Early Girl tomatoes describes trials in which severe pruning and staking led to earlier ripening on the first three trusses, alongside reduced yield and increased concerns about cracking or splitting. Those findings are specific to the cultivar and trial conditions; they do not establish that every home-garden tomato will ripen weeks earlier.
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Late-season topping is a different tactic
If frost is approaching and an indeterminate plant is still making new growth, topping it about a month before expected first frost can redirect attention toward fruit already set. Vermont and Oregon State Extension describe this as a late-season measure. It is not evidence that routine early-season sucker removal guarantees an earlier first harvest.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What the evidence does—and does not—say
Several university extension sources support the possibility that selective pruning can help fruit mature earlier. The available guidance does not establish a universal number of weeks saved across varieties, climates, and pruning methods. The 1978 Oregon State Early Girl report is a particular trial, not a general forecast for home gardeners.
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A 2024 study in Horticulture Research examined ripening after tomatoes were harvested very early. It is not a test of pruning, so it does not show that removing suckers advances harvest. Very early picking and pruning the plant are different interventions.
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Sources
- University of Wisconsin–Madison Division of Extension: Tomato Pruning
- University of Vermont Extension: How to Prune Tomato Plants
- Oregon State University Extension Service: Grow your own tomatoes and tomatillos
- University of California Statewide IPM Program: Cultural Tips for Growing Tomato
- Oregon State University North Willamette Research and Extension Center: Tomato Yield and Quality Affected by Pruning Method (1978)
- Horticulture Research: Fruit ripening and postharvest changes in very early–harvested tomatoes
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