The Q&A Archives: Ixora

Question: Ixora - I think they are Nora Grant that have been in the yard for about 7 years. They have taken quite a beating from the cold weather last year and this year. They have leaves but light green. I have tried fertilizer and magnesium sulphate on them. What do you recommend to get them back to normal. What type of fertilizer and how often to apply. Also have some dwarf ixora 1 year old need he

Answer: Ixora grown in alkaline soil is very prone to iron and manganese deficiencies. The symptoms appear on the new foliage as leaves turn yellow or begin yellowing between the leaf veins while the veins remain green. As symptoms continue, leaves may become smaller and the buds may die. Although chelated iron and manganese can be applied to the soil as granular fertilizer, high soil pH prevents most of it from being taken up by the plant. Liquid micronutrients sprayed on the foliage work best for treating the problem. Apply these materials according to the manufacturers' recommendations (mixing with distilled water or rainwater). Protect white surfaces, such as concrete, as the fertilizer will stain them yellow. Adding organic mulches, applying soil sulfur at recommended rates, and using acidic fertilizers are all ways to help lower high pH.

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