the main thing about ivy - it likes to stay cool - like 55F nite, 65F day. if you can't provide that - you'll have all kinds of problems, mites being the major, then scales, then ...drying up..then shedding leaves...then caput
#2 - it needs very bright light - with some cool sun for a few hours.
#3 - it needs to stay evenly moist.
think ireland - the land of ivy.... cool mists, fogs, drizzle and few frosts.
