When to Prune Tomato Plants? Complete Pruning Guide

Determinate vs Indeterminate Pruning

Indeterminate (Prune These)

Vining tomatoes that grow all season
Benefit from sucker removal
Examples: Better Boy, Brandywine, Cherry
Prune throughout season
Results in larger, earlier fruit

Determinate (Minimal Pruning)

Bush tomatoes with set height
Heavy pruning reduces yield
Examples: Roma, Celebrity, Patio
Only remove diseased leaves
Leave suckers for more fruit

What to Prune and When

What to Remove	When	Why
Suckers (2-4 inches)	Weekly	Directs energy to fruit
Lower leaves	Ongoing	Prevents soil-borne disease
Yellowing leaves	As they appear	Removes diseased tissue
Growing tip	4-6 weeks before frost	Ripens existing fruit faster

How to Prune Tomato Suckers

Identify suckers

Look for shoots growing in the "V" or "armpit" between the main stem and a branch. These are suckers.

Remove small suckers by hand

When suckers are under 4 inches, pinch them off with your fingers. Bend to the side and snap cleanly.

Use clean pruners for larger ones

For suckers over 4 inches, use clean, sharp pruners to avoid tearing. Disinfect between plants if any show disease signs.

Prune in dry conditions

Prune when plants are dry to prevent disease spread. Morning after dew dries is ideal. Avoid pruning before rain.

Benefits of Pruning Tomatoes

Earlier ripening: Energy goes to fruit instead of excess foliage

Larger fruit: Fewer fruits per plant but each one is bigger

Better air circulation: Reduces fungal disease risk

Easier management: More controlled growth, easier to stake

Disease prevention: Removing lower leaves prevents soil splash

Frequently Asked Questions

Should I prune determinate or indeterminate tomatoes?

Mainly prune indeterminate (vining) tomatoes. Determinate (bush) tomatoes should NOT be heavily pruned as this reduces yield. Only remove suckers below the first flower cluster on determinate varieties and skip other pruning.

What are tomato suckers and should I remove them?

Suckers are shoots that grow in the 'armpit' between the main stem and a branch. Removing suckers on indeterminate tomatoes directs energy to fruit production. Leave some suckers if you want a bushier plant with more (but smaller) tomatoes.

Can I prune tomatoes too much?

Yes, over-pruning stresses plants and can cause sunscald on fruit (leaves protect fruit from direct sun). Never remove more than 1/3 of foliage at once. Keep enough leaves to shade developing fruit.

Should I remove lower leaves on tomato plants?

Yes, remove lower leaves touching the soil or within 12 inches of the ground. This prevents soil-borne diseases like blight. Also remove yellowing or diseased leaves as they appear throughout the season.

When to Prune Tomato Plants?

Quick Answer