If hibiscus receives excessive shade, is drought-stressed, or is extensively clipped in late spring, it will not bloom. With fewer flowers produced by hibiscus due to excessive nitrogen fertilization, flowering is also inhibited by excessive phosphorus fertilization. Summer is the blooming season for hibiscus. Continue reading to find out why and how to encourage flowers...
Via https://thegardenhows.com/hibiscus-not-blooming-reasons-for-hibiscus-not-flowering/
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