Can be used with any soil or media to enhance organic fertilizers. This special granular form, mycorrhizal blend can absorb organic forms of nutrients and promote green leaf growth, fruit and flower production while increasing drought and insect resistance. Mycorrhizae fungus have been called the orchestrators of the root zone as they create a network around fine feeder roots that absorb nutrients & minerals. Effective for 95% of all plant species and the widest variety of soil and plant uses. Not for sale in HI at the time of this catalog printing.