GenetixBayEST. 2009
Quick answer · Harvest and cure · How-to

How do I trim buds?

Grower practice
Draft: awaiting expert review Updated
  • Also asked
  • How do I manicure buds?
  • Trimming tips for beginners
  • Scissors or a trim machine?
  • Should I wet trim or dry trim?

Short answer

Take off the big fan leaves at harvest. Then cut or brush the sugar leaves back to the outline of the bud, either wet on harvest day or dry once the small stems snap after 7–14 days. Wet versus dry is preference (House position). Use small, sharp scissors, gloves and a tray, and keep the trim. Grower practice: no independent study compares the two methods.

Why

Trimming changes how the bud dries. Sugar leaves left on act as a jacket and slow the dry, which helps in a dry room, where a fast dry costs volatile monoterpenes [1]. Trimming wet speeds drying, which helps in a humid room where mould is the bigger risk. Both have to reach water activity 0.55–0.65 by the end [2].

Resin gets in the way. Wet buds are sticky and gum up scissors. Dry sugar leaves are crisp and brush off easily, at the cost of a few more trichome heads knocked loose. The founder, who has trimmed hundreds of pounds by hand, prefers dry trim for that reason.

Timing and conditions vary. Commercial growers report a range of drying and trimming set-ups [3], and there is no single right answer. Choose the method that suits your room and your hands.

The numbers

Wet trim Dry trim
When Harvest day After 7–14 days, once stems snap
Drying speed Faster Slower
Best room Humid, high mould risk Dry, buds crisp easily
Hands Sticky, slower Easier at volume
Trichome loss Slightly less Slightly more (collects in the trim)

Verdict: pick the method that suits your room's humidity. Both make excellent flower.

What to do

  1. Remove the large fan leaves at the chop.
  2. Wet trim: cut the sugar leaves back while the buds are fresh, then dry them on a rack or hanging.
  3. Dry trim: hang the branches untrimmed, then trim once the stems snap and before jarring.
  4. Hold buds by the stem and turn them as you cut. Don't squeeze the bud.
  5. Work over a fine screen or tray to catch the trichomes. Clean the scissors with alcohol.
  6. Bag the trim and keep it cold for hash or edibles.

Common mistakes

  • Blunt scissors that tear the bud.
  • Squeezing buds to steady them.
  • Trimming in a warm, bright room.
  • Throwing the trim away.

Follow-up questions

Is wet trim or dry trim better?

Wet or dry trimming is grower preference, and both make excellent cannabis. Wet trim dries faster and suits humid rooms with high mould risk. Dry trim slows the dry, because sugar leaves act as a jacket, and is far easier on the hands at volume. GenetixBay's founder prefers dry trim, accepting slight trichome loss because the trim gets used anyway.

How much sugar leaf should I leave on?

Leave cannabis sugar leaves trimmed back to roughly the outline of the bud, with any resin-coated tips that sit flush left on. Remove the parts that stick out and show mostly green leaf. A tighter trim looks neater and smokes cleaner; a looser trim keeps more weight. Either way, the trim is resin-rich and worth saving for hash or edibles.

Should I use a trim machine?

A trim machine is faster than hand trimming for large harvests, but it handles buds harder, can knock off trichome heads and gives a less precise finish. For a home grow of a few plants, sharp scissors and an hour or two per plant give a better result. If you use a machine, dry trim with a light touch and save the collected resin.

Sources

  1. Ross SA, ElSohly MA, 1996. The volatile oil composition of fresh and air-dried buds of Cannabis sativa. Journal of Natural Products 59(1):49–51. diverdi.colostate.edu/C442/references/analysis/GC/j_nat_prod
  2. ASTM D8197. Standard Specification for Maintaining Acceptable Water Activity (aw) Range (0.55 to 0.65) for Dry Cannabis Flower. ASTM International. store.astm.org/d8197-22.html
  3. Cannabis Business Times. Special report: cannabis post-harvest benchmarks (grower survey; average drying ~53 % RH, ~65 °F). cannabisbusinesstimes.com/business-issues-benchmarks/cannabi

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