Degree Days Accumulation
Degree Days Accumulation (GDD or Growing Degree Days) is an agricultural metric measuring cumulative heat units above a baseline temperature, commonly 50°F (10°C), during a growing season. In cannabis breeding and cultivation research, this measure helps predict phenological timing—when plants reach flowering, peak cannabinoid synthesis, or harvest maturity. Breeders working in varied climates use GDD data to select cultivars suited to specific regional conditions and to standardize reproduction timelines across environments. Unlike terpenes or cannabinoids, GDD is not a chemical compound but a phenological tool for understanding how temperature stress and seasonal length shape plant development and secondary metabolite expression.
Degree Days Accumulation strains
No strains tagged into Degree Days Accumulation yet — they'll appear here as breeders submit lineage records under this terpene.
Degree Days Accumulation (GDD or Growing Degree Days) is an agricultural metric measuring cumulative heat units above a baseline temperature, commonly 50°F (10°C), during a growing season. In cannabis breeding and cultivation research, this measure helps predict phenological timing—when plants reach flowering, peak cannabinoid synthesis, or harvest maturity. Breeders working in varied climates use GDD data to select cultivars suited to specific regional conditions and to standardize reproduction timelines across environments. Unlike terpenes or cannabinoids, GDD is not a chemical compound but a phenological tool for understanding how temperature stress and seasonal length shape plant development and secondary metabolite expression.
Breeders use GDD accumulation to match cultivar maturation windows with local growing seasons, ensuring consistent harvest timing across regions. Lineage records increasingly incorporate GDD thresholds to document which parent lines thrive in cool short-season or extended warm-season environments.
Educational reference · Cultivar metadata only · No medical claims