Should you trim leek leaves during growth?
Written by
Olivia Mitchell
Reviewed by
Prof. Charles Hartman, Ph.D.Trim the leaves of these at transplanting only, when you can cut both the leaf and the root, as both are perforated. Do not expose the growing plant by cutting a single leaf; instead, leave the root to make up for the rest. The young plant, as its stem is forming, gathers its first nourishment; all the leaves are necessary for its feeding and growth.
Transplant Preparation
- Cut leaves to 6 inches (15 cm) for reduced transpiration
- Trim roots to 1 inch (2.5 cm) to stimulate new root growth
- Remove damaged outer leaves completely
- Soak roots in water before planting to prevent shock
Established Plants
- Never trim actively growing healthy leaves
- Remove yellowing or diseased leaves at the base
- Avoid cutting more than 10% of foliage at once
- Use sterilized shears to prevent disease transmission
Winter Preparation
- Trim only after harvest for storage preparation
- Cut leaves to 6 inches above stem for cold storage
- Leave intact for in-ground overwintering protection
- Remove damaged foliage before mulching heavily
Leaves do more than photosynthesize. The V-shaped leaves direct rainwater down to the roots. Their surfaces absorb morning dew, supplementing the moisture. They protect young stems from full-on sun. A deliberate attack on this natural canopy of plants reduces their stamina.
There's measurable damage in poor trimming, however. Big Fats Plants pruned of healthy "no-no" leaves produce 40 percent less carbohydrates, because the plants devote their production power to refoliation rather than stem thickening. Stressed, lean leeks are more susceptible to insect infestation and disease. If you must trim, be sure your cutting tools are sanitized and sharp.
Know when to trim. Remove the affected leaves of any that have been attacked by thrips, which exhibit streaking on the foliage. Cut down all that is touched by the rust fungus at once. Remove the foliage that has been severely bent or broken by wind or weather. Burn everything of this kind rather than risk consequences in the garden.
Try other ways to trim. Use supports to keep your plants leaning, rather than cutting off their leaves. Get air to them by spacing, not by pruning. Administer foliar nutrients to them, and encourage strong leaves, and keep their foliage intact.
Discover why leaves turning yellow in the fall is a natural occurrence. "Outer leaves die back as plants mature, transferring nutrients to inner parts"? This natural senescence of the leaves requires no intervention, as the yellow will fall off the plant by itself. Remove only the completely brown dried leaves. Partly green leaves, even if faded, still lend some energy to plant growth.
Read the full article: 10 Essential Steps for Growing Leeks
