Hi KD, glad to be back
I am not really good fertilizing my Adeniums, I only do it once when I see them waking up from slumber..usually just a few osmocote around. But I do amend the soil with some compost.
Right now my Adenium is not really fully asleep, it is a bit late dropping the leaves, but it is also trying to make some blooms. Just different year to year ..one time it is all leaves gone, and I think I have to do some alcohol swabs again later..seeing some white spots on the leaves.
But winter time is not too hectic for this plant, I know it is in some form of dormancy. Just got to be patient and wait for more active growth when temps and sunlight gets better.