what is wrong with my hibiscus? - Knowledgebase Question

redlands, Ca
Question by msescober
June 7, 2010
I fertilized my tropical hibiscus with miracle grow and have sprayed it with insecticide. why does the leaves remain small and some become yellow right away?

Answer from NGA
June 7, 2010


Hibiscus tends to drop its oldest leaves while at the same time producing healthy new leaves. Sometimes hibiscus can get leggy (bare stems at the bottom of the plant). If this happens with yours, you can safely prune it back by one-third. This will promote healthy new stem growth, which will develop new leaves and flowers. Feeding with an acidified fertilizer such as Miracid is just fine. If your soil is terribly alkaline, iron will help. If all the leaves are yellowing, not just the oldest leaves, then an application of ironite is in order and will help rectify the situation. Apply either miracid or ironite though, not both, or your hibiscus might be overwhelmed.

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