MicroLife Citrus & Fruit (6-2-4) Professional Grade Granular Organic Biological Fertilizer, 7 LBS. Manufacturer ‏ : ‎ MicroLife. MOST COMPLETE NUTRITIONAL FERTILIZER DESIGNED FOR ALL CITRUS & FRUIT TREES: contains over 100 + minerals, vitamins, natural plant hormones and stimulators, essential sugars/amino acids/carbon and protein plus billions of beneficial microorganisms including Endo & Ecto Mycorrhizal.