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BLOWOUT SALE! Greatly increases root mass to enhance growth and yield! General Hydroponics SubCulture-M is a mycorrhizae root inoculant that contains a wide diversity of endo and ecto mycorrhizal fungi that colonize plant roots. These beneficial fungi form a fine network of fibrous strands that serve as an extension of the plant’s root system; increasing root area and helping plants absorb water and nutrients.

Use from germination or propagation all the way through harvest. Reduce the amount of fertilizer and still achieve superior growth and huge yields. May be used with Sub Culture-B to create a diverse microbial community beneficial for plant health.

Available size: 150gm Jar (5.29 oz)

Feed Chart – PDF
Material Safety Data Sheet (MSDS) – PDF


Direct Application: Mix with purified water to make a root drench. Add 1 pouch per 25 gallons of water or 1 tsp per 5 gallons of water. For seed inoculant soak seeds for 30 minutes. For established plants irrigate the root zone. Use strong dose for first applications, milder for maintenance. Use once or twice monthly.

Hydroponics: Add Sub Culture-M directly to reservoir. Add 1 tsp per 10 gallons with each nutrient change.

Soil or Growing Media: Blend with soil before planting using 1 pouch per 8 cubic feet of soil or rooting media (peat moss, coco fiber or bulk rockwool).