SuNutri
SuNutri
Back to Guides
Intermediate Guide

Pruning & Training

Maximize your harvest with proper pruning techniques. Learn when and how to prune different crops, plus trellising systems for vertical growing.

15 min read
Hands-on techniques

Why Prune Your Vegetables?

Pruning isn't just for ornamental plants. Strategic pruning of vegetables can increase yields, improve fruit quality, reduce disease, and make harvesting easier. Combined with proper support systems, pruning transforms your garden into a highly productive growing space.

Improved Air Circulation

Reduces fungal diseases by allowing leaves to dry quickly

Better Light Penetration

Sunlight reaches more leaves for increased photosynthesis

Larger Fruits

Energy goes to fewer fruits, making each one bigger

Earlier Ripening

Concentrated energy means faster maturation

Tomato Pruning: The Complete Guide

Tomatoes benefit the most from pruning. Indeterminate (vining) tomatoes especially respond well to sucker removal and training.

1Identify Suckers

Suckers grow in the "armpit" between the main stem and branches.

  • Look for new growth at 45-degree angles
  • Suckers below first flower cluster should be removed
  • Upper suckers can be left or pruned depending on your goals
Identify Suckers
2Remove Lower Leaves

Leaves touching the ground invite disease.

  • Remove leaves within 12" of soil
  • Improves air circulation
  • Prevents soil splash diseases
3Top the Plant

Stop upward growth 4 weeks before first frost.

  • Cut the main growing tip
  • Allows existing fruits to ripen
  • Redirects energy from new growth to ripening
4Missouri Pruning

A compromise method that removes sucker tips but leaves some foliage.

  • Pinch out the tip of suckers after 2 leaves
  • Provides more leaf cover in hot climates
  • Good balance of fruit size and sun protection

Pruning Guide by Crop

Trellising & Support Systems

Vertical growing saves space, improves air circulation, and makes pruning and harvesting easier. Choose the right system for your crops and space.

Comparison of 4 trellis designs: A-frame, vertical string, horizontal panel, and lean-to

Different trellis styles suit different crops and garden spaces

Florida Weave

String weaving between stakes for tomatoes

Row plantings of indeterminate tomatoes

Materials: T-posts or wooden stakes, twine

Pros:

  • Economical
  • Easy to set up
  • Good for many plants

Cons:

  • Requires regular weaving
  • Not as sturdy in wind
Single Stake

One stake per plant with ties

Individual plants, peppers, eggplant

Materials: Wooden or metal stakes, soft ties

Pros:

  • Simple
  • Good for small spaces
  • Easy access

Cons:

  • Need many stakes
  • Must tie regularly
Cage

Wire cage surrounds plant

Determinate tomatoes, peppers

Materials: Concrete reinforcing wire or commercial cages

Pros:

  • Low maintenance
  • No tying needed
  • Reusable

Cons:

  • Expensive
  • Hard to store
  • Can be flimsy
A-Frame Trellis

Angled panels meeting at top

Cucumbers, pole beans, peas

Materials: Wood or metal frames, netting or string

Pros:

  • Space efficient
  • Easy harvest from both sides
  • Shade underneath

Cons:

  • Fixed height
  • Requires construction
Vertical String

Strings hanging from overhead support

Greenhouse tomatoes, cucumbers

Materials: Overhead structure, twine, clips

Pros:

  • Clean
  • Easy to prune
  • Maximum light

Cons:

  • Needs overhead support
  • Daily training required

Common Pruning Mistakes

Pruning determinate tomatoes

Problem: Dramatically reduces yield - they fruit on branch tips
Solution: Only remove lower leaves and any dead or diseased foliage

Pruning too late in the day

Problem: Wounds stay wet overnight, inviting disease
Solution: Prune in morning so cuts dry in sunlight

Using dull or dirty tools

Problem: Spreads disease and makes ragged cuts
Solution: Clean tools between plants with alcohol wipes

Removing too much at once

Problem: Stresses plant, exposes fruit to sunscald
Solution: Never remove more than 1/3 of plant at once

Pruning during or after rain

Problem: Disease spreads easily in wet conditions
Solution: Wait for dry weather and dry foliage
Essential Pruning Tools

For Light Pruning:

  • • Clean fingers (for small suckers)
  • • Sharp scissors or snips
  • • Pruning shears for stems up to 1/2"

Best Practices:

  • • Clean tools with rubbing alcohol between plants
  • • Sharpen blades regularly for clean cuts
  • • Cut at 45-degree angle, 1/4" above node
Proper 45-degree angle pruning cut above an outward-facing bud

Cut at 45° angle just above an outward-facing bud

Espalier training patterns for fruit trees

Espalier patterns for training fruit trees on walls

Next Steps