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

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

Cutting Edge Uncle John's Blend SP™ 4-0-27 is a high-potassium, micronutrient-rich soluble powder formulation engineered to support peak plant performance from vegetative growth through the flowering phase. With 27% soluble potash (K₂O) as its primary nutrient, it delivers the elevated potassium demand characteristic of heavy-producing flowering crops while simultaneously addressing the chelated micronutrient needs — Manganese (3.9%), Zinc (0.49%), Iron (0.47%), and Sulfur (9.5%) — that are often undersupplied in standard base nutrient programs.

The chelated trace mineral package ensures bioavailability across a broad pH range, preventing micronutrient lockout in recirculating systems where pH fluctuation is common. Potassium plays a central role in stomatal regulation, carbohydrate transport, and enzyme activation — with adequate K levels during flowering directly supporting bud density, resin development, and terpene production. Uncle John's Blend SP™ integrates seamlessly into all commercial nutrient programs and is compatible with drip irrigation, recirculating hydroponics, and foliar spray applications. Yellow-green color, pH 5.74, specific gravity 1.05.

Key Features & Benefits

• 27% Soluble Potash (K₂O) — High-potassium loading supports the elevated K demand of flowering and fruiting crops during peak production phases.
• Chelated Mn, Zn, Fe Micronutrients — EDTA-chelated trace minerals remain plant-available across a wide pH range, preventing deficiency-driven yield and quality losses in recirculating systems.
• 9.5% Sulfur — Supports protein synthesis, chlorophyll formation, and enzyme cofactor availability throughout the growth cycle.
• Enhances Terpene & Oil Concentrations — Adequate potassium and micronutrient nutrition during the flowering phase supports secondary metabolite synthesis, increasing aromatic compound development in fragrant flowering crops.
• Universal Program Compatibility — Highly soluble powder dissolves cleanly in fertigation solutions, compatible with drip irrigation, recirculating hydroponic systems, and foliar applications.

Who Should Use This

Commercial and boutique growers running high-potassium late-season flowering programs will find Uncle John's Blend SP™ a flexible tool for addressing potassium and micronutrient demands simultaneously. It is particularly effective when stacked with a base three-part nutrient program to bridge the micronutrient and potassium loading gap common in high-EC production runs. Foliar application during vegetative and transitional phases provides rapid correction of visual micronutrient deficiency symptoms.

Compatibility

Soluble powder — dissolve in water before adding to reservoir or spray tank. Compatible with all Cutting Edge Solutions® products and other commercial nutrient programs. Perform a jar test before large-scale tank mixing with unfamiliar products. Available in 20lb.

Frequently Asked Questions

When in the growth cycle should I use Uncle John's Blend SP?

Uncle John's Blend SP™ is effective through all growth stages but 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 growth 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 to the full reservoir or spray tank volume while stirring. Do not add dry powder directly to a concentrate mixing tank with undiluted nutrient solutions.

Can this replace a dedicated micronutrient package?

Uncle John's Blend SP™ provides Mn, Zn, Fe, and S but does not supply the full micronutrient spectrum (B, Mo, Co, Cu). 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?

Uncle John's Blend SP™ is a synthetic chelated mineral supplement. For certified organic programs, verify compliance with your certifier's approved input list before use.