16-0-0 Double Dark 6% Iron - Bio-Nite - Granular Lawn Fertilizer | Yard Mastery

16-0-0 Double Dark Granular Lawn Fertilizer

16-0-0 Double Dark Granular Lawn Fertilizer is designed to do exactly what the name implies: make your lawn double dark green. This premium granular fertilizer is built for DIYers who want deep, blue-green color without excessive growth and is safe for all established grass types.

• High iron content (6%) for deep, blue-green color
• 16% nitrogen with 25% slow-release for steady feeding
• Includes Bio-Nite™ to support soil microbes
• Urea-based nitrogen for darker green color without surge growth
• Works on all cool- and warm-season lawns
• Easy DIY application

Size Options & Coverage

• 18 lb bag covers up to 6,000 sq ft
• 45 lb bag covers up to 15,000 sq ft

Application Information

• Apply at 3 lbs per 1,000 sq ft
• Reapply every 30–45 days during the growing season
• Can be used on cool- and warm-season lawns
• Water in within 48 hours with at least 1/4" irrigation or rainfall
• Sweep excess off sidewalks and driveways to prevent staining

Approved for use on Kentucky Bluegrass, Turf Type Tall Fescue, Ryegrass, Bermuda, St. Augustine, Zoysia, Centipede, and Bahia.