Adenium Blooming in Autumn

They do this every year, at least one will spend the summer just sitting there while all your other adeniums are busy putting on their annual floral show. Then the literal late-bloomer will start developing buds when it starts getting cold at night. If your plant does that, bring it inside immediately--these buds are extremely sensitive to temperatures below 16C. Put it in the sunniest, warmest room in your abode and keep watering it with very weak fertilizer every week.