Castilite® patented Nutrient Efficient granular fertilizers are designed for use wherever nitrogen or phosphate applications are limited or restricted. Castilite® uses unique microbes to fix nitrogen from the atmosphere and un-lock phosphate for up to 18 weeks. Castilite® fertilizers contain NutriSmart®, a biological eco-fertilizer and humate soil amendment. Castilite® helps build a sustainable ecosystem by enriching the soil with organic matter and by supporting diverse microbial populations. Castilite