16-0-0 Double Dark Granular Lawn Fertilizer
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16-0-0 Double Dark Granular Lawn Fertilizer
16-0-0 Double Dark Granular Lawn Fertilizer
16-0-0 Double Dark Granular Lawn Fertilizer
16-0-0 Double Dark Granular Lawn Fertilizer
16-0-0 Double Dark Granular Lawn Fertilizer

16-0-0 Double Dark Granular Lawn Fertilizer

$40.49
$44.99
$40.49
Size: 18 lbs small bag (covers 6,000 sq ft)
Subtotal: $40.49
16-0-0 Double Dark Granular Lawn Fertilizer

16-0-0 Double Dark Granular Lawn Fertilizer

Description

 

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.

Product Label & Specs (PDF)

Key Benefits: 

  • 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
  • Water in within 48 hours with at least 1/4" irrigation or rainfall
  • Sweep excess off sidewalks and driveways to prevent staining


Features & Specs

Product Specifications

  • Analysis: 16-0-0 (N-P-K)
  • Nitrogen: 16% total nitrogen, 25% slow-release
  • Iron Content: 6%
  • Bio-Nite™: Yes
  • Form: Granular
  • Application Rate: 3 lbs per 1,000 sq ft
  • Bag Sizes:
    • 18 lb (6,000 sq ft)
    • 45 lb (15,000 sq ft)
  • Water-In Requirements: Water in within 48 hours with at least 1/4 inch of irrigation or rainfall
  • Concrete Staining: Yes, sweep excess off sidewalks and driveways to prevent staining
  • Storage: Store in a dry location for up to 2 years
Label & Resources

Resources & Videos

FAQs

Frequently Asked Questions

Can I use Double Dark on any grass type?
Yes. It is safe for all major cool- and warm-season lawns.

Will it make my lawn grow too fast?
No. The slow-release nitrogen and iron focus on color without excessive growth.

How soon will I see results?
Most users notice deeper green color within 7–14 days.

Do I need to water it in?
Yes. Water in within 48 hours to activate nutrients and prevent staining.

Is it safe for pets and children?
Yes. Once watered in and dry, it is safe for re-entry.

Shipping & Support

Shipping & Support

No P.O. Boxes.

Shipping

Shipping is included for most states within the U.S.

A $9.95 surcharge applies to California, Idaho, Montana, Nevada, Oregon, Utah, and Washington.

Not available in Alaska or Hawaii.

Delivery Time 4–7 business days
Returns All sales are final; no cancellations, returns, or exchanges.
Customer Support Contact Yard Mastery Support

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