Cutting Edge Uncle John's Blend SP™ 4-0-27 — 20lb

High-Potassium Powder with Chelated Micronutrients, 20lb

A flowering crop pushing hard toward harvest needs more potassium than a standard base nutrient program budgets for, and the manganese, zinc, and iron that ride along with it are often the first things to go short in a recirculating system. Uncle John's Blend SP 4-0-27 supplies 27% soluble potash alongside EDTA-chelated Mn, Zn, and Fe that stay plant-available across a wide pH range.

This 20lb soluble powder dissolves cleanly into fertigation solutions, compatible with drip irrigation, recirculating hydroponics, and foliar applications.

Key Features & Benefits

• 27% soluble potash (K₂O) — high-potassium loading supports the elevated K demand of flowering and fruiting crops during peak production.
• Chelated Mn, Zn, Fe micronutrients — EDTA-chelated trace minerals stay plant-available across a wide pH range, preventing deficiency-driven quality loss in recirculating systems.
• 9.5% sulfur — supports protein synthesis, chlorophyll formation, and enzyme cofactor availability.
• Enhances terpene & oil concentrations — adequate potassium and micronutrient nutrition during flowering supports secondary metabolite synthesis.
• Universal program compatibility — dissolves cleanly for drip, recirculating hydroponic, and foliar use.

Who Should Use This

Commercial and boutique growers running high-potassium late-season flowering programs, especially those stacking it onto a base three-part nutrient program to close a micronutrient gap, are the direct fit for this 20lb size.

About Cutting Edge Solutions

Cutting Edge Solutions was started by grower Uncle John Piccirilli and is now headquartered in White City, Oregon, where it develops passive-uptake nutrient supplements with an emphasis on micronutrient completeness.

Frequently Asked Questions

When in the growth cycle should Uncle John's Blend SP be used?

It is most impactful during the flowering phase when potassium demand peaks and micronutrient turnover is highest. It can also be applied as a foliar spray during vegetative and transitional phases for rapid micronutrient correction.

How do I dissolve the soluble powder?

Dissolve the measured dose in a small volume of water first, then add it to the full reservoir or spray tank while stirring. Do not add dry powder directly to a concentrate mixing tank with undiluted nutrient solution.

Can this replace a dedicated micronutrient package?

Uncle John's Blend SP provides Mn, Zn, Fe, and S but not the full micronutrient spectrum of boron, molybdenum, cobalt, and copper. It functions as a potassium and targeted micronutrient supplement rather than a complete trace element package.

Is Uncle John's Blend SP compatible with organic nutrients?

It is a synthetic chelated mineral supplement, not a certified organic input. Growers running certified organic programs should confirm approval with their certifying body before adding it to a feeding schedule.