Cutting Edge Solutions Louder Powder Grow B (8-13-31), 5 lb Bag

Granular Phosphorus-Potassium Complement for the Vegetative Stage, 5 Lb Bag

Grow B is the second half of the Louder Powder vegetative-stage system, supplying the phosphorus, potassium, and secondary micronutrient side of the formula that Grow A's calcium-nitrogen base doesn't cover. Mixed together in equal parts, Grow A and Grow B form a complete granular base nutrient for vegetative growth.

The 5 lb bag lets a home grower or small operation try Grow B alongside Grow A before committing to a larger bag size.

Key Features & Benefits

• 8-13-31 macronutrient blend — delivers 8.0% nitrogen (1.7% ammoniacal, 6.3% nitrate), 13.0% available phosphate, and 31.0% soluble potash.
• Magnesium and sulfur included — adds 0.7% magnesium and 4.0% sulfur alongside the primary macronutrients.
• Trace element package — supplies boron, iron, and manganese as part of the chelated micronutrient blend.
• Mixed equal parts with Grow A — used at an equal-parts ratio with Grow A, added only after Grow A has fully dissolved.
• Fits standard commercial systems — dosed the same way as Grow A across drip, recirculating DWC, aeroponic, NFT, and siphon injection setups, so no separate equipment is needed.

Who Should Use Louder Powder Grow B

Commercial growers running the Louder Powder granular base system during the vegetative stage who need the phosphorus, potassium, and micronutrient half of the formula to pair with Grow A.

About Cutting Edge Solutions

Louder Powder is Cutting Edge Solutions' granular base nutrient line, developed for commercial growers who prefer mixing dry concentrate over storing and shipping liquid gallons. Grow B pairs with Grow A as the vegetative half of the Mineral family, CES's two-part granular system. Formulation, bottling, and shipping for the full CES catalog happen in-house at the company's White City, Oregon facility.

Frequently Asked Questions

What is Louder Powder Grow B?

Louder Powder Grow B is a granular 8-13-31 nutrient that supplies phosphorus, potassium, magnesium, and sulfur for the vegetative stage. It's the second half of the two-part Louder Powder Grow system, mixed together with Grow A.

How much Grow B do I mix with Grow A?

Grow A and Grow B are mixed at an equal-parts ratio, roughly 4.5 grams per gallon each for reservoir feeding. For a stock tank concentrate, dissolve 1 lb per gallon of RO water and dose at a 1:100 ratio.

What secondary nutrients does Grow B provide?

Grow B adds 0.7% magnesium and 4.0% sulfur to the vegetative feed, along with a chelated trace-element package that includes boron, iron, and manganese. These round out the primary phosphorus and potassium supplied by the 8-13-31 base.

When should I switch to the Bloom A/B pair?

Switch from Grow A/B to Bloom A/B once the plant transitions from vegetative growth into flowering. The Bloom pair carries a lower-nitrogen, higher-phosphorus and potassium profile suited to flower development.

Can Grow B be used without Grow A?

Grow B is designed to be used together with Grow A as a complete vegetative base; used alone it doesn't supply the calcium and nitrogen levels the vegetative stage needs. Follow the CES usage guide for the correct combined dosing schedule.