hoya damaged by cold
do I remove hoya leaves that turned dark while in garage during cold weather? if so, how far back?
Yes you can remove them if they are dead. It is ok to take it all the way to the soil level. Keep any dead growth out of the plant as to avoid infection.
This article will refresh you on their care: https://www.gardeningknowhow.com/ornamental/vines/hoya-wax-plant/growing-hoya-wax-vines.htm