Dark Matter™ 21-0-0 Ammonium Sulfate Fertilizer | High-Nitrogen Lawn, Garden & Turf Fertilizer | Fast-Acting Small Prill Formula | 40lbs | Covers up to 13,333 sq ft |

★★★★☆ 4.0 61 reviews

$59.99
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$59.99
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Management number 214760426 Release Date 2026/04/12 List Price $24.00 Model Number 214760426
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Premium Turf, Garden & Landscape Fertilizer – Fast-Acting, Deep Green Formula Get the Ultimate Lawn & Garden Boost with DARK MATTER 21-0-0 Transform your lawn, garden, and landscape with DARK MATTER 21-0-0 Ammonium Sulfate, a high-performance nitrogen fertilizer designed to rapidly green up turf, nourish plants, and promote strong, healthy growth. Unlike standard ammonium sulfate, this premium-grade formula delivers an intense, long-lasting deep green without streaking or burning. Perfect for lawns, vegetable gardens, flower beds, shrubs, trees, and ornamental plants, this small-prill fertilizer ensures even coverage and quick absorption, giving your entire landscape professional-grade results. Whether you're growing lush grass, vibrant flowers, or nutrient-rich vegetables, DARK MATTER delivers the essential nitrogen and sulfur needed for strong root development, vigorous foliage, and enhanced plant health. Why Choose DARK MATTER? ✔ Fast-Acting, Long-Lasting Green-Up – High-quality ammonium sulfate delivers instant nitrogen to fuel rapid growth and vibrant color. ✔ Ultra-Fine Prill for Maximum Coverage – Ensures even distribution and consistent results with every application. ✔ Versatile Use – Perfect for lawns, vegetable gardens, flower beds, shrubs, trees, and ornamental plants. Application Instructions Lawn Application Rate: 3-4 lbs per 1,000 sq. ft. Frequency: Apply every 3-4 weeks or as needed. Watering: Water immediately after application for best results. ⚠ Avoid Application if heavy rain is expected within 24 hours. Application Rates for Gardens & Ornamental Plants 🌿 Vegetable Gardens & Flower Beds Rate: 0.5 - 1 lb per 100 sq. ft. Frequency: Every 3-4 weeks or as needed Application: Evenly spread and lightly work into the top 1-2 inches of soil, then water thoroughly 🌳 Shrubs & Trees Rate: 0.5 - 1 lb per inch of trunk diameter (applied around the drip line) Frequency: 2-3 times per growing season Application: Apply evenly under the canopy, keeping 6 inches away from the trunk 🌱 Potted Plants & Container Gardens Rate: 1 teaspoon per gallon of soil Frequency: Every 3-4 weeks Application: Mix into the topsoil and water immediately ✅ Best for nitrogen-loving plants like leafy greens (lettuce, kale, spinach), corn, tomatoes, and ornamental shrubs. ⚠ Avoid excessive use in fruiting plants during flowering, as too much nitrogen can promote foliage growth over fruit production. Storage & Warnings ⚠ May cause skin and eye irritation – Use gloves, eye protection, and a dust mask when handling. ⚠ Iron content may stain concrete, sidewalks, and driveways – Sweep any spills immediately. ⚠ Keep out of reach of children and pets. State Restrictions ❌ Not labeled for lawn use in: Florida, New Jersey, Maryland, Vermont, and New Hampshire. Approved for agricultural, ornamental, garden, and non-lawn landscape use where permitted. Always check local fertilizer regulations before application.

  • Fast-Acting Green-Up & Growth – DARK MATTER 21-0-0 delivers a powerful nitrogen boost for rapid turf, garden, and plant growth, producing deep green lawns, vibrant flowers, and nutrient-rich vegetables.
  • Versatile for Lawns, Gardens & Ornamentals – Ideal for cool- and warm-season grasses, vegetable gardens, flower beds, shrubs, and trees. Perfect for leafy greens, tomatoes, and ornamental plants.
  • Ultra-Fine Prill for Even Coverage & Quick Absorption – Designed for smooth spreader application and is trusted by professionals for superior results.
Coverage Up to 12,000 sq ft
Item Form Prill
Brand Name Generic
Unit Count 640.0 Ounce
Item Weight 40 Pounds
Manufacturer CE Outdoors
Mixing Ratio 1:0:0
Model Number Dark Matter 18-0-0
Target Species plants, Lawn Grass, Flowers, Vegetables, Trees, Houseplants
Included Components Dry Fertilizer
Specific Uses For Product Plant Growth, Soil Conditioning

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