Why Has My Lavender Become Woody and Leggy?

A lavender plant that was once a neat, rounded mound can transform within a couple of years into an open, sprawling tangle of bare woody stems with only a thin fringe of green foliage at the tips. This is one of the most common problems lavender growers encounter, and it has one primary cause: missing or insufficient annual pruning. Without regular trimming, lavender naturally grows woody at its base, elongates its stems, and gradually loses the compact habit that makes it both beautiful and productive.

Why lavender goes woody without pruning

Lavender produces its new growth only on green wood. Each year, the base of each stem gradually lignifies — turns woody and brown — while new shoots emerge from higher up. If you never cut back into the green wood, the plant progressively extends upward, leaving an ever-longer section of bare, woody stem at the base. After three to five years without pruning, you have a plant that looks half-dead at the base and carries most of its foliage on a few spindly, long stems.

Can I cut back into the woody part?

This is the critical question. Lavender cannot regenerate reliably from old brown wood the way rosemary sometimes can. If stems are entirely woody with no green buds or leaves emerging from them, cutting into that zone will produce dead stumps. You must always leave some green growth on every stem you cut. The practical limit is to cut back to where you can clearly see green shoots beginning — usually within the top third to half of the plant.

Rescuing a moderately woody plant

If your lavender is leggy but still carries some green foliage along the lower part of each stem, it can often be rescued with a careful renovation prune. In early spring, cut each stem back by about one third to one half, always leaving visible green shoots below the cut. Apply a light dressing of grit around the base to improve drainage and keep the crown dry. With luck, the plant will push dense new growth from multiple points on each remaining stem over the following weeks.

Replacing heavily woody lavender

A plant that is completely woody with bare stems and only a few green tips at the very end cannot realistically be rejuvenated. The best course is to take cuttings from any healthy green shoot tips in summer — they root easily in free-draining compost — and start a new plant. Remove the old plant entirely and do not replant lavender in the same spot without improving the soil.

Preventing woodiness going forward

Once your lavender is growing healthily again, commit to two light annual pruning sessions: one in early to mid spring, cutting back the previous year's growth to just above the base of the green shoots, and a second trim after flowering finishes in late summer to remove spent flower stalks and tidy the shape. This two-cut approach keeps the plant compact and extends its productive life by several years.