A Hoya & a Kalanchoe have very different care requirements. (I have several of these types! Would feel the same!) I've had a few at one point or another slow down in growth...*The "Mother Plant" is said to die after producing babies. The babies I keep in the same pot as momma...gently spraying with a spray bottle for water vs. drowning them & their delicate roots! I also Keep in south facing window...or outside during summer! Might need to check & make sure there is room for root growth...or even changing soil. (But if you are talking about OVER THE WINTER it stopped producing ONLY....keep in mind plants have growing seasons & even though we manipulate them, their natural "instincts" kick in if given a chance!) ;)
