"Some sativas and sativa hybrids require a longer dark period at the end of flowering to fully ripen their buds. Outdoors, this happens in due course as the nights lengthen in the fall. Indoors, change the lighting regime to 14 hours of darkness/10 hours of light to promote ripening. This is especially helpful in finishing low latitude varieties that donít reach maturity in their native lands, where there is no winter, until the middle of the short-day season."
very interesting, I'll be doing that after this week, thanks.