The best time to cut back lavender is twice a year: once in spring, just before bud break (late March to early April), when you cut back about one to two-thirds of the lavender; and once in summer, in July or August, cutting back to about half after flowering. Alternatively, a strong hard prune can be done late August or early September, right after the final flush of flowers has died down, which helps prepare the plant for the next year's blooms. Avoid pruning too deeply into woody parts, and be cautious not to cut during heavy frost times or late fall in colder climates. Summary of lavender pruning timing and care:
- Spring pruning (late March - early April): Cut back 1/3 to 2/3 before buds break.
- Summer pruning (July - August): Cut back half after flowering.
- Hard prune in late August or early September after flowering ends is optimal.
- Do not prune too deep into old wood to avoid plant damage.
- Avoid pruning in fall in cold climates to prevent winter damage.
- Light pruning through summer is fine, but heavy pruning should be saved for spring or late summer.
This regimen promotes bushy growth, prolongs blooming, and helps avoid woody, leggy plants.
