When to Harvest Cannabis: Reading Trichomes Correctly
Harvest timing changes the finished product more than almost anything else you do in the final month. The only reliable indicator is the trichomes, viewed under magnification.
What to look at
Use a jeweler's loupe at 60x or a cheap USB microscope. Look at trichomes on the flower itself, not on sugar leaves — sugar leaf trichomes mature earlier and will mislead you.
The three stages
Clear means immature and not ready. Cloudy or milky means peak cannabinoid content. Amber means cannabinoids are degrading into more sedative compounds.
Target ratios
Mostly cloudy with 5-10% amber gives a bright, energetic result. 20-30% amber gives a heavier, more relaxing one. Beyond that the flower goes distinctly sleepy.
Why not pistils
The old advice of harvesting when 70-80% of pistils have darkened is a rough guide only. Pistils darken from wind, contact, and humidity independently of ripeness.
Frequently asked questions
- Can I harvest in stages?
- Yes. Taking the top colas first and letting lower buds mature another week under better light exposure is a common and effective technique.