buds dropping off tropical hibiscus
I purchased 4 tropical hibiscus plants from Hidden Valley Hibiscus (two larger plants and two smaller). I received the plants in April and closely followed the directions given regarding watering and fertilizing. Even purchase they're recommended fertilizer. Have yet to get a bloom. On plant has come close but when the bud gets fairly large and it looks like it is about to bloom, the bud and stem yellow and drop off! Very frustrating! Any advice?