White Widow

Out of stock

BLOWOUT SALE! The mycorrhizal fungi in Humboldt Nutrients White Widow can help provide plant roots with greater access to water and nutrients in the soil. When using this mycorrhizal powder, it is common to see large, bright white roots shooting out of the bottom of containers only a week after transplanting.

Available size: 4 oz Container

Feeding Schedule (PDF)


Apply 1/4 to 1/2 tsp per gallon of feed water.

Sprinkle 1/4 to 1/2 tsp under each transplant every planting or re-planting.

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 brasilianum ….. 9,300 prop/ cc
Glomus monosporum ….. 9,000 prop/ cc