• 888-815-9763 Sales & Support Mon - Fri, 8am - 5pm PST. Instagram Facebook Twitter Google + Youtube



Save Now on Top Brands Like Twister, CenturionPro and Trimpro... Up To $600 off! Shop Now


Humboldt Nutrients White Widow 4 oz.

Item #: 723226

Be the first to review this product

Humboldt Nutrients
Your Price:

In Stock

In stock items ship within 24 hours

100% Discreet Shipping Price Match Guarantee The HB Difference

Warranties | Returns & Replacements

White Widow 4 oz.

Additional Images

Consider this alternative
Humboldt Nutrients Master A/B Soil Nutrient Package
Humboldt Nutrients Master A/B Soil Nutrient Package
Starting at: Configure Items For Price
Shop Now


Mycorrhizal inoculants are crucial to sustaining a healthy, expansive root zone. Humboldt Nutrients is proud to launch our newest and most powerful soluble Mycorrhizal, White Widow.

White Widow is a Mycorrhizal powder containing an extremely high and diverse amount of mycological spores. No other Mycorrhizal on the market has more propagales per gram. White Widow is a diverse, pure endo Mycorrhizal.

The effectiveness of a soluble Mycorrhizal inoculants relies heavily on 2 variables; the amount of spores in the product itself and the ability of that product to become soluble in water. White Widow is a super-fine powder which quickly and easily dissolves into water.

With White Widow the speed and aggressiveness of your plant's root development is unprecedented. It is common to see large, furry, bright white roots shooting out of the bottom of containers only a week after transplanting with the White Widow.
White Widow is bacteria free, making it ideal for hydroponic systems. Used in soil, soil-less or hydroponic gardens White Widow is a must have for gardeners concerned about the quality and health of their plant's root systems.

If you can keep things healthy on the surface, Humboldt Nutrients White Widow will handle the situation underneath.

Composition: Pure Endomycorrhizal
Glomus clarum, G.aggregatum, G.intraradices, G.mosseae, G.deserticola, G.etunicatum, Gagaspora margarita, G.brasilianum and G.monosporum
Total propagules 120000/gram
Inert filler materials 95.0%
The goal with Mycorrhizal inoculants (spores) is to create physical contact with the root zone.
Use White Widow throughout vegetative cycle and into the first two weeks of bloom.
Application rates:
Hydroponic applications: Use ½ to 1 tsp per gallon of reservoir water. Change nutrient solution weekly to avoid excess sediment.
Soil Application: Use ½ to 1 tsp per gallon container during transplanting. For bedding use 5-10 tsp per bag of soil (1.5cu.ft)


Brand Humboldt Nutrients
SKU 723226
Weight (lb.) 0.4
Height (in.) 2.5
Width (in.) 3.75
Length (in.) 3.75
Warranty Yes
Free Shipping No
Nutrient Application Hydroponic and Soil Nutrient
Nutrient Type Organic Based
OMRI Certified No
Nutrient Material Type Powder

Shipping Info:

Ships Via FedEx/UPS

Questions about this product?
Contact us for advice or more details. Our product specialists are here to help.
Email an Expert
Report an issue on this page

Why Shop with Hydrobuilder?
We offer the best service and support in the industry. Your complete satisfaction is our goal.