Humboldt Nutrients White Widow is a mycorrhizal powder containing a high amount of many different mycological spores. It is pure endo Mycorrhizal! 

A healthy root system is a vast network of white weblike root fibers that can be even more effective when it forms symbiotic relationships with mycorrhizae fungi. The mycorrhizal fungi in White Widow can help provide plant roots with greater access to water and nutrients in the soil.

It is not uncommon to see large, furry, white roots shooting out of the bottom of plant containers only a week after transplanting with the White Widow!

Formulation includes these Endo-Mycorrhizae:

Glomus clarum - 12,500 prop/cc
Glomus aggregatum - 12,100 prop/cc
Glomus intraradices - 11,300 prop/cc
Glomus mosseae - 11,000 prop/cc
Glomus deserticola - 10,400 prop/cc
Glomus etunicatum - 10,000 prop/cc
Gigaspora margarita - 9,900 prop/cc
Glomus brasillanum - 9,300 prop/cc
Glomus monosporum - 9,000 prop/cc

White Widow is a super-fine organic powder which quickly and easily dissolves into water. Effective in soil or hydroponics!

Application rate: use 1/4 - 1/2 teaspoon under each transplant or use 1/4 - 1/2 teaspoon per gallon water