Wet → dry estimator

Cited targets

From the genetics.guru grow library, in the units each source used. Grades: strong and moderate are peer-reviewed; community practice is untested.

• wet-to-dry ratio (trimmed inflorescence)drying · flower25–29% of fresh weightModerate

  computed: (1-MCwet)/(1-MCdry) with MCwet 0.75-0.78 and MCdry 0.10-0.14; GROW_TOOLS default 20-25% is lower; let users calibrate

  2 sources

  1. Das PC, Vista AR, Tabil LG, Baik OD (2022). Postharvest Operations of Cannabis and Their Effect on Cannabinoid Content: A Review
  2. Punja ZK, Ni L, Lung S, Buirs L (2023). Total yeast and mold levels in high THC-containing cannabis (Cannabis sativa L.) inflorescences are influenced by genotype, environment, and pre-and post-harvest handling practices
• dry flower moisture for low TYMpost-harvest · dried flower≤ 14% moisture content (aw 0.65-0.70 or lower)Strong

  drying to 12-14% MC or lower inversely correlated with cfu

  1 source

  1. Punja ZK, Ni L, Lung S, Buirs L (2023). Total yeast and mold levels in high THC-containing cannabis (Cannabis sativa L.) inflorescences are influenced by genotype, environment, and pre-and post-harvest handling practices
• water activity (storage)cure/storage · dried flower0.55–0.65 a_wExtension

  ASTM D8197-22 specification; >0.68 requires further drying

  1 source

  1. ASTM International (2022). ASTM D8197-22 Standard Specification for Maintaining Acceptable Water Activity (aw) Range (0.55 to 0.65) for Dry Cannabis Flower Intended for Human/Animal Use
• dry weight to marketable weight (15% moisture)post-harvest0.85 divisorModerate

  Marketable weight = oven-dry weight / 0.85.

  1 source

  1. Rodriguez-Morrison V, Llewellyn D, Zheng Y (2021-05-11). Cannabis Yield, Potency, and Leaf Photosynthesis Respond Differently to Increasing Light Levels in an Indoor Environment — Frontiers in Plant Science 12:646020