By Sirius J at Hightimes.com
Pure Sativa strains hail from the humid climates of Southeast Asia, certain regions of Africa, Indochina and Northeastern India. These plants grow tall with thin leaves, and produce wispy buds.
These skinny buds are an evolutionary trait that helps these plants avoid mold outbreaks, as dense buds would be far more susceptible. The native environment of Sativas never really gets cold and has a near constant level of humidity: very high. These plants take their sweet time when flowering, stretching into late October and November.
On the other hand, Indica strains grow short and squat, with thick fan leaves and dense buds.
Indicas cannabis originates from the dry climates of Central and Southern Asia: Afghanistan, Pakistan and India. These regions experience dry air until October at which point rain starts to fall. This seasonal rise in humidity has made Indica cannabis evolve to flower very early to avoid the mold that Fall humidity could cause.
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