When is the best time to harvest lavender?
Written by
Kiana Okafor
Reviewed by
Prof. Charles Hartman, Ph.D.Harvest time determines the strength of lavender flavor, and thus the quality of oil. Harvesting at peak ripeness increases the therapeutic benefit. I learned this through many years of harvesting lavender too soon. The difference between good and great lavender is the timing. In every case below, perfect timing eches out the desired result. Use these suggestions.
Visual Cues
- Bud coloration: Purple/blue hues fully developed but buds unopened
- Stem appearance: Bottom flowers just beginning to open on spikes
- Plant vibrancy: Healthy silver-green foliage with no wilting
- Avoid: Fully open flowers that shed petals easily
Environmental Factors
- Weather window: 3 consecutive dry days before harvesting
- Temperature: Below 85°F (29°C) to preserve volatile oils
- Time of day: Mid-morning after dew evaporates
- Avoid: Harvesting after rain or during high humidity
Conservative harvesting is critical for first-year plants. Only cut a third of the flowering stems. This assists with energy storage for root development. I initially harvested too early, thus compromising the strength of young plants. Mature plants can tolerate half the harvesting of flowering stems while sustaining less stress.
The timing of mid-morning is most effective for essential oils. Dew has usually evaporated by 9-10 AM overnight in most climates. I harvest before 11 AM during the summer months because, in my experience, the oil tends to evaporate due to the afternoon heat. Cooler temperatures retain the fragrance compounds.
Plant health can be improved by using the right harvesting tools. Use sharp bypass pruners, sanitized with alcohol. Cut the stems six inches under the flower heads. I make angled cuts, just above leaf nodes on stems. This promotes bushier regrowth for future harvests.
Harvesting in dry weather prevents mold. Lavender keeps water moisture deep inside the flower heads. I personally wait at least 48 hours after it has rained. Pay attention to upcoming dry spells. If it is properly timed, they will crumble easily when dried!
Read the full article: How to Grow Lavender From Seed Successfully
