Hello Mc357, I would suggest you stop giving fertilizers at this time. Adeniums slow down a lot in growth and eventually goes dormant. I have learned to respect its need for dormancy at this time of the year. As it slows down, its reaction time to changes goes very slow so rather than risk getting it fertilizer burn, let it sleep the cold season away. It does like feeling warmth, so it is good you have it indoors with good grow lights. but do not expect much growing. It will resume more vigor when ambient conditions are more favorable, temps much warmer, natural light levels stronger in late Spring.
