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The optimal day temperature range for cannabis is 24 to 30 °C (75 to 86 °F). [12] Temperatures above 31 °C (88 °F) and below 15.5 °C (60 °F) seem to decrease THC potency and slow growth. At 13 °C (55 °F) the plant undergoes a mild shock, though some strains withstand frost temporarily. [13] [14] [15]
Adequate gas exchange is necessary for optimal plant growth. Ventilation is also an important method for maintaining an optimal temperature for plant growth. Advanced grow room even include air conditioning to keep running temperatures down, as well as CO 2 to boost the plant's growth rate.
Flowering finishing: majority of petals fallen or dry 69: End of flowering: fruit set visible Principal growth stage 7: Development of fruit 71: Fruits begin to develop G: Caryopsis watery ripe 79: Nearly all fruits have reached final size normal for the species and location Principal growth stage 8: Ripening or maturity of fruit and seed 81
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Growing degrees (GDs) is defined as the number of temperature degrees above a certain threshold base temperature, which varies among crop species. The base temperature is that temperature below which plant growth is zero. GDs are calculated each day as maximum temperature plus the minimum temperature divided by 2, minus the base temperature.
Vacuum microwave drying is used for the US Army's experimental Close Combat Assault Ration. [3] Freeze drying or lyophilization is a drying method where the solvent is frozen prior to drying and is then sublimed, i.e., passed to the gas phase directly from the solid phase, below the melting point of the solvent. It is increasingly applied to ...
[3] [4] Cannabidiol (CBD) is another major constituent of some cannabis plants. [5] Conversion of CBD to THC can occur when CBD is heated to temperatures between 250–300 °C (480 to 570°F), potentially leading to its partial transformation into THC. [6] At least 113 distinct cannabinoids have been isolated from cannabis. [7]
Tetrahydrocannabinolic acid (THCA, 2-COOH-THC; conjugate base tetrahydrocannabinolate) is a precursor of tetrahydrocannabinol (THC), an active component of cannabis. [1]THCA is found in variable quantities in fresh, undried cannabis, but is progressively decarboxylated to THC with drying, and especially under intense heating such as when cannabis is smoked or cooked into cannabis edibles.