Dry weight is the mass of harvested flower once it has been dried to a stable, jar-ready moisture, generally around 0.55-0.65 water activity. When growers quote yield in grams per plant, grams per square metre or grams per watt, they mean dry, trimmed bud.
In practice
Dry weight keeps falling a little during the cure, because curing is a slow decline in moisture, not holding it constant. A few percent loss over the first weeks in the jar is normal. That's why weights are most comparable when taken at the same stage (at jarring, or after a set cure time) and at a checked water activity.
Watch out for false gains. Buds jarred too wet weigh more but risk mould, and they lose the weight anyway. Buds over-dried weigh less and smoke harsh. Neither is a better yield.
Precision matters in trials. GenetixBay Bay Trials should record dry weight with the water activity or equilibrated jar RH at weighing, so comparisons between growers are fair.
Typical dry ≈ trimmed wet × 0.20-0.25. Yield per area = dry weight / canopy area (g/m²).
Don't confuse with
- Wet weight: fresh weight at harvest.
- Dry-weight basis: lab correction for cannabinoid % at 0% moisture.
- Bone-dry weight: oven-dried with all water removed, a lab figure.
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.Yield is the dry weight of usable flower harvested, usually expressed per plant, per square metre of canopy (g/m²) or per watt of light (g/W).Grams per watt (g/W) is dry flower yield divided by the electrical wattage of the grow lights, a rough measure of how efficiently a grow turns power into product.Bay Trials are GenetixBay's member-run controlled grow experiments that test growing claims side by side and publish the results openly.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.The canopy is the top layer of foliage and buds across a grow, the surface that intercepts most of the light and where yield is mostly made.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.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 amount of water in a material as a percentage of its weight; cured cannabis flower usually sits around 10-12% w/w, though measurement method matters.Holding dried cannabis in sealed containers so its moisture declines slowly and evenly over weeks, improving smoothness and aroma.
