Looking to protect your lawn from summer stress while keeping it dark green and healthy? Emerald 10‑0‑20 is your go-to solution. This professional-grade fertilizer delivers deep color and lasting performance with 45% slow-release nitrogen and a powerful boost of potassium. Now upgraded with Micronutrient Technology, every granule is coated with essential micros and amino acids for better absorption, improved soil health, and visibly stronger turf. Why Choose Emerald? Dark green color without fast growth 45% slow-release nitrogen for long-lasting feeding High potassium builds root strength and boosts stress tolerance Micronutrients to improve turf color and health Phosphorus-free formula — ideal for phosphorus-sensitive lawns like Centipede Great for All These Grass Types: Tall Fescue Kentucky Bluegrass St. Augustine Zoysia Bermuda Centipede Perennial Rye When to Apply Apply every 6–8 weeks during the growing season: Tall Fescue: May through August Kentucky Bluegrass: April through September St. Augustine: May through December Centipede: March through August (every other month) Tip: For Centipede lawns, alternate Emerald with NutriGreen 0‑0‑4 for balanced nutrition without overfeeding. How to Apply Apply 4-5 lbs per 1,000 sq ft using a broadcast spreader Water in after application Sweep fertilizer off sidewalks, driveways, and patios to avoid staining Need a Stronger Nitrogen Push? If you want faster green-up and more top growth, consider our Almighty 20-0-10. It delivers double the nitrogen of Emerald 10-0-20 for instant color. Frequently Asked Questions Can I use this on St. Augustine or Centipede lawns?Yes. Emerald is phosphorus-free and safe for both. For Centipede lawns, alternate with a lower-nitrogen product like NutriGreen 0‑0‑4 to avoid over-fertilization. Will it stain my concrete or patio?It may. Fertilizer with iron can stain hard surfaces, so always sweep/blow stray granules off immediately. Do not wash it off with water. How long does it feed the lawn?Emerald feeds slowly and steadily for up to 8 weeks thanks to the 45% slow-release nitrogen. Grow Beyond GreenEmerald 10‑0‑20 delivers more than just color — it builds turf that can take the heat, resist disease, and bounce back stronger.