Moisture content (MC) is the mass of water in a sample as a percentage of its total (wet-basis) mass. Fresh cannabis is around 75-80% water; well-dried and cured flower is commonly cited at about 10-12% w/wbeing reviewed.
In practice
Growers estimate it from weight. A plant typically loses about 70-80% of its wet weight in drying, so dry weight is commonly about 20-25% of fresh weight. Weighing a marked jar or test bud through the dry shows how fast you're going.
House position: what matters during the cure is the bud's moisture content and water activity, not jar RH as such. Curing is a slow, steady decline in moisture, not holding it constant. MC and aw are related but not identical: two cultivars at the same MC can sit at different aw.
MC (wet basis, %) = (wet mass - dry mass) / wet mass × 100.
Don't confuse with
Holding dried cannabis in sealed containers so its moisture declines slowly and evenly over weeks, improving smoothness and aroma.The weight of cannabis freshly cut, before drying; buds typically lose about 70-80% of it, so dry weight is roughly a quarter of wet.The weight of cannabis after drying (and usually trimming), the basis growers use for yield; it is typically about 20-25% of trimmed wet weight.A 0-1 measure of how freely available the water in a material is; for dried cannabis flower the accepted range is about 0.55-0.65 aw.The relative humidity of the air in a sealed container once it has stopped exchanging moisture with the material inside; ERH / 100 equals the material's water activity.Dry-weight basis reports a result per gram of sample with its water removed, while as-received basis reports it per gram as delivered, water included; dry-weight figures are always higher.A cannabinoid is any compound that binds the body's cannabinoid receptors or shares the typical cannabis terpenophenolic structure; the plant-made ones are phytocannabinoids such as THCA and CBDA.Relative humidity is the water vapour in air as a percentage of what it could hold at that temperature, so the same RH dries plants differently at different temperatures.
