Strengthen your turf with LESCO 5-0-20 Spar-TECH MOP BIO Fertilizer, a premium granular blend designed to improve lawn health, stress tolerance, and color. With a low-nitrogen, high-potassium formula plus iron and biosolids, this is the perfect fertilizer for tough growing conditions, late-season feeding, or periods of heat and drought.

This is an ideal stress blend for cool-season lawns like tall fescue, Kentucky bluegrass, or ryegrass during the hot summer months. It helps maintain strength and color without pushing excess growth. For warm-season lawns like Bermuda or St. Augustine, it’s perfect in late summer and fall when nitrogen demand drops but potassium becomes essential for root development and winter preparation.

Key Features

• 5-0-20 analysis builds strong turf without excessive growth
• Spar-TECH™ micronutrient technology improves nutrient uptake
• 0.15% iron enhances color without surge growth
• Muriate of potash (MOP) delivers effective potassium for stress protection
• Biosolids add organic matter and slow-release nitrogen
• Covers up to 10,000 sq ft per 50 lb bag

Best Time to Apply by Lawn Type

Cool-Season Lawns (Tall Fescue, Bluegrass, Ryegrass)

• June, July, and August – Use as a stress blend during heat to maintain turf strength and color without pushing top growth
• October and November – Helps prepare the lawn for winter dormancy and improves disease resistance

Warm-Season Lawns (Bermuda, Zoysia, St. Augustine)

• August through October – Strengthens turf and roots in late summer and fall as nitrogen demand declines
• Early Spring (March in southern zones) – Supports early recovery before nitrogen-heavy feeding begins

Guaranteed Analysis

• Total Nitrogen (N): 5.00%
  • 4.61% Urea Nitrogen
  • 0.12% Other Water Soluble Organic Nitrogen
  • 0.27% Water Insoluble Nitrogen
• Soluble Potash (K₂O): 20.00%
• Iron (Fe): 0.15%
• Derived from: Urea, Muriate of Potash, Iron Amino Acid Complex, Biosolids

Application Guidelines

• Use rotary spreaders only
• Apply 5.0 lbs per 1,000 sq ft
• Water in after application
• Avoid mowing immediately after application
• Sweep off sidewalks and hard surfaces to avoid staining

Product Details

• Net Weight: 50 lb (22.7 kg)
• Coverage: 10,000 sq ft
• Granule Size (SGN): 230

Pro Tip

This blend is a go-to for managing heat stress on cool-season lawns during summer and for prepping all lawns in late summer and fall. Pair it with a nitrogen-rich fertilizer earlier in the season, then switch to 5-0-20 to toughen up your turf when it matters most.