Answer: High acid fertilizers are usually reserved for plants that thrive in acid soils, such as African Violets and Azaleas. Your poinsettia's don't require acid soils. In order to encourage the bracts of the plants to grow lush, choose a plant food that's high in nitrogen. (Bracts are the part of the poinsetta that turn red - what we consider the 'flowers') A good formula would be a 10-5-10. The first number is nitrogen, which promotes healthy vegetative growth. The second number (phosphorous) helps with blossom formation and strengthens stems. Since poinsettia plants have tiny yellow flowers, you don't want to overdo with phosphorous. The third number is for potassium, which also aids stem growth, and helps the roots develop. Hope the above information helps!
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