Pruning Fundamentals for Healthier Plants

Pruning is not about controlling plants; it is about helping them grow well. Removing dead, damaged or crowded wood improves airflow, directs energy and lets light reach the parts of the plant that produce flowers and fruit.

Start with clean, sharp tools

Use bypass secateurs for stems up to about 1.5 cm, loppers for larger branches and a pruning saw for anything thicker. Clean blades between plants with rubbing alcohol, especially when disease is present. Sharp tools make clean cuts that heal faster.

The three Ds

Begin every pruning session by removing the three Ds: dead, damaged and diseased wood. This alone solves a surprising number of problems and makes the rest of the job easier to see.

Timing matters

• Spring-flowering shrubs such as lilac and forsythia: prune just after flowering.
• Summer-flowering shrubs such as buddleja: prune in late winter or early spring.
• Most fruit trees: prune in dormant season, avoiding hard frost.
• Evergreens: light shaping in early spring or late summer.
• Maples and birches: prune in late summer to avoid heavy sap bleed.

Make a proper cut

Cut just outside the branch collar — the slightly swollen ring where a branch meets the trunk. Do not leave a stub and do not cut flush into the trunk. For heavy branches, use the three-cut method to prevent tearing bark.

Do not over-prune

Removing more than a quarter of a plant's growth in one season is stressful. Step back often and check your work. It is easier to remove another branch later than to undo an overenthusiastic cut.