Relative Humidity
Relative humidity (RH) is the amount of moisture in air expressed as a percentage of the maximum moisture that air can hold at a given temperature. In cannabis cultivation, RH levels significantly influence plant physiology, transpiration rates, and disease pressure throughout the growth cycle. Different growth stages have established RH ranges: seedlings and clones typically thrive in 65-75% RH, vegetative plants in 55-70% RH, and flowering plants in 40-50% RH to reduce mold risk. Breeders and cultivators monitor RH because it affects terpene expression, calyx development, and overall plant health. Understanding RH dynamics is essential for breeding programs seeking to develop cultivars suited to specific climate zones or indoor environments.
Relative Humidity strains
No strains tagged into Relative Humidity yet — they'll appear here as breeders submit lineage records under this classification.
Relative humidity (RH) is the amount of moisture in air expressed as a percentage of the maximum moisture that air can hold at a given temperature. In cannabis cultivation, RH levels significantly influence plant physiology, transpiration rates, and disease pressure throughout the growth cycle. Different growth stages have established RH ranges: seedlings and clones typically thrive in 65-75% RH, vegetative plants in 55-70% RH, and flowering plants in 40-50% RH to reduce mold risk. Breeders and cultivators monitor RH because it affects terpene expression, calyx development, and overall plant health. Understanding RH dynamics is essential for breeding programs seeking to develop cultivars suited to specific climate zones or indoor environments.
Breeders select for humidity tolerance when developing cultivars intended for specific climates or growing systems. Genetic lines showing mold resistance or improved terpene stability across varying RH ranges are valuable breeding stock in damp climates.
Educational reference · Cultivar metadata only · No medical claims