I’ve had this Coleus in this vase since August, and everything seemed to be going just fine up until a week ago when I had to pluck one of the bottom most leaves off because it had turned brown and dry. This week, I had to take another bottom leaf out for the same reason. I notice the same thing happening to this current leaf too, around the edges. Anyone know what could be causing this? I keep the plant in a north facing window, it does get cold at night in this area because of fall temps recently. I change the water every week.

