Pruning Mugo Pine: Techniques to Control Size and Maintain Health

Can You Prune an Overgrown Mugo Pine?

A homeowner has three mugo pines; one is 6 feet tall and wide, encroaching on a sidewalk. Severe pruning is risky because pines do not regenerate from old wood.

Proper Pruning Method: Candle Pinching

• In spring, new growth appears as “candles” (thick shoots at branch tips).
• Pinch or cut candles back by one-half to two-thirds before needles fully expand.
• Do this in two stages: most vigorous candles first, weaker ones a week later.
• Healthy trees can have all new candles removed every other year.

What Not to Do

• Do not cut back into old, needle-less wood—it will not resprout.
• Do not shear like a hedge; use hand pruners to avoid damaging emerging needles.
• Central leader can be cut to 12 inches; side laterals trimmed to maintain pyramidal shape.

If the Pine Is Already Too Large

Replacement with a dwarf cultivar may be wiser. If pruning is attempted, do it gradually over several years, never removing more than one-third of the canopy annually.