Wicked Growth Deep Green Lawn Mix 20-0-12 Fertilizer

High-Nitrogen, Fully Slow-Release Feeding for Deep Green Turf

Old Cobblers Farm™ Wicked Growth Deep Green Lawn Mix 20-0-12 is a high-nitrogen lawn fertilizer built for steady, long-lasting feeding. The 20-0-12 ratio supplies 20% nitrogen for healthy growth and 12% potassium for strong, resilient turf, with 0% phosphorus. What sets it apart is that all of the nitrogen is water-insoluble — the guaranteed analysis shows 20.0% water-insoluble nitrogen — so it releases gradually and feeds the lawn over several weeks.

Because the nitrogen is fully slow-release, it feeds gently: you get steady growth and color without the rapid flush and higher burn risk that come with quick-release nitrogen. Added magnesium (1.2%) supports chlorophyll development to help maintain deep green color. The phosphorus-free formula also suits established lawns in areas where phosphorus applications are limited (always check your local rules).

Where to use it: established residential lawns, landscape turf, parks and recreational turf, and maintained sports fields.

Key Benefits

•  Fully Slow-Release Nitrogen: 100% water-insoluble nitrogen feeds gradually over several weeks for steady growth and color.

•  Gentle, Low-Burn Feeding: Because the nitrogen is water-insoluble, it feeds gently and reduces the flush growth and burn risk of quick-release feeds.

•  Deep Green Color: Added magnesium (1.2%) supports chlorophyll for rich, deep green turf.

•  Phosphorus-Free Formula: 0% phosphorus suits established lawns where P is restricted (check local rules).

•  Strong, Resilient Turf: 12% potassium supports grass structure and overall lawn resilience.

•  Long Feeding Window: One application supports feeding for roughly 6–8 weeks.

•  Simple Spreader Application: Even coverage at about 5 lbs per 1,000 sq ft.

Best Uses

•  Established residential lawns

•  Landscape turf areas

•  Parks and recreational turf

•  Sports fields and maintained grass areas

•  Properties where phosphorus is restricted

•  Lawn maintenance programs

Important Notes / Safety

•  Soil Test First: Always test your soil before applying any fertilizer.

•  Conventional Fertilizer: This is a Wicked Growth product — a conventional/commercial fertilizer, not an organic product.

•  High Nitrogen, Low Burn: The 20% nitrogen is fully water-insoluble (slow-release), so burn risk is low — but still water in after applying and avoid applying to wet foliage in hot midday heat.

•  Apply & Water In: Spread evenly and water in lightly to move nutrients into the soil.

•  Storage: Store in a cool, dry place. Keep sealed and away from children and pets.

•  Coverage: All coverage estimates assume a single application at the recommended rate.

Why Choose Old Cobblers Farm™?

We build dependable lawn nutrition with straightforward application. Deep Green Lawn Mix pairs a high nitrogen level with fully water-insoluble, slow-release feeding, so an established lawn gets steady growth and deep color over several weeks — with magnesium for color and no phosphorus. (We describe how to use the product, not guaranteed results.)