I’ve had this aloe for a year and it’s been thriving... it’s only ever been in this spot and has over doubled in size since I purchased, but now it seems to be having issue. my biggest leaf is creasing and others edges are starting to curl making an almost tubular stem. I was watering every 2 weeks but read for winter I should water every 3 weeks. I live in zone 7a. Also the tip of one stem is turning yellow. thoughts??