What is the best month to prune lavender?
Written by
Liu Xiaohui
Reviewed by
Prof. Samuel Fitzgerald, Ph.D.The timing for pruning lavender is crucial for healthy growth, and it should be done at the right time. For me, I prune my plants in early spring, typically late March to mid-April as silvery buds emerge. Summer deadheading generally is done in July, after the blooms have wilted. Never prune your lavender in the fall or winter, as fresh cuts will be damaged by frost.
Regional climate influences when to prune. Gardeners in cooler areas (like Minnesota) start later, whereas those in the Southern region will start earlier. I usually check soil temperatures ahead of cutting. I will wait to see consistent temperatures above 45°F (7°C). Additionally, very hot weather (greater than 90°F (32°C)) can also put plants under stress, so choose your pruning times wisely.
Spring Preparation
- Cut before new growth hardens in March-April
- Remove up to 1/3 of young plant height
- Trim only 1/4 from mature lavender
- Shape plants into domes for sunlight exposure
Summer Maintenance
- Deadhead spent blooms in July-August
- Cut flower stalks 2-3 inches below base
- Avoid pruning during pollinator activity
- Complete by early September in cold zones
Correct timing avoids frost damage at the base. I have had lavender plants for over a decade, using this method. Late pruning creates frost damage. It kills the woody stems from within. I set it on my calendar every year. Regular treatment guarantees an ample bloom every summer.
Monitor your plants for natural signs: Bud formation indicates it's time to prune in spring. Blooms that fade indicate summer deadheading. I keep a garden journal for the records. Healthy lavender plants can show growth in weeks. Adjust based on plant signals.
Read the full article: When to Prune Lavender for Best Results
