Answer: Bougainvilleas are heavy feeders and respond best to almost constant feeding with 1/2 strength water soluble fertilizer, e.g., Peter's 20-20-20, Excel 21-5-20, Miracle Grow or Rapid Grow. With high light and constant feeding, the plants will bloom at least 11 months of the year. Straight hibiscus food has also been a very successful fertilizer for both bougainvilleas and Ixoras.
Give this fertilizer regime a try and I think you'll see a difference in their performance.
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