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Because they are broadleaf evergreens, hibiscus tends to lose its oldest leaves throughout the year. The leaves turn a bright yellow and then drop off the plant. But, a new leaf will grow in its place in a week or so. If the yellowing leaves are scattered throughout the plant and towards the center of the plant, it's normal and natural. If the entire shrub is yellowing, or if only the new growth is yellowing, it indicates a water stress. Try watering deeply once or twice a week to make sure the plant is getting adequate water. You might also try giving your hibiscus about a half cup of Ironite. This should help green up the leaves. Best wishes with your hibiscus! |
