I'm not entirely sure where it comes from environmentally, but I've had foxtails on the last stretch of flowering with good temps and no amber trichs.Many sativa crosses grow that way where the calyx stack upwards from the bottom to the top of a cola
causing it with heat or over maturing looks different, that is just normally a few foxtails stacking at the top of a few colas
where the rest of the cola is not stacking
peace
WTF is up with foxtails?