Lawn Fertilizer 10-0-20 with Controlled-Release Nitrogen, Added Iron and Extra Potassium for Established Turf

Lawn Synergy Lawn Fertilizer 10-0-20

Lawn fertilizer 10-0-20 helps established lawns receive steady feeding with extra potassium for turf strength, root function, color, and stress tolerance. The phosphorus-free formula is designed for routine feeding of cool-season and warm-season lawns.

Emerald combines 45% controlled-release nitrogen (XCU) with added iron and micronutrients. It is suited to lawn care priorities that favor strength, color, and resilience over rapid top growth. Select the 18 lb., 25 lb., or 50 lb. size that fits your treatment area.

Features

• 10-0-20 analysis with extra potassium
• 45% controlled-release nitrogen (XCU)
• Added iron and micronutrients support rich green color
• Phosphorus-free formula
• For established cool-season and warm-season lawns
• Available in three bag sizes

Specifications

• Product type: Lawn fertilizer
• Formula: 10-0-20
• Nitrogen: 45% controlled-release nitrogen (XCU)
• Phosphorus: Phosphorus-free formula
• Sizes: 18 lbs.; 25 lbs.; 50 lbs.
• Intended lawn coverage: Established cool-season and warm-season lawns

Frequently Asked Questions

What is the analysis of this lawn fertilizer?

The analysis is 10-0-20, with extra potassium and 45% controlled-release nitrogen (XCU).

Which lawn types is Emerald intended for?

It is described for established cool-season and warm-season lawns.

What sizes are available?

The selectable sizes are 18 lbs., 25 lbs., and 50 lbs.

Does this formula contain phosphorus?

No. The description identifies Emerald as a phosphorus-free formula.