Specialty Plant Food

Royal Roots 21-0-0 Ammonium Sulfate

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Size 1.5 lb 5 lb

Quantity

Crop: All types
Stage: Early growth or corrective
Composition: Nitrogen 21%, Phosphorus 0%, Potassium 0%

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The Royal Roots 21-0-0 Formula

21-0-0 fertilizer (ammonium sulfate) is a nitrogen-rich fertilizer suitable for a variety of flowers, plants, trees, and crops. It is coated with essential amino acids that support plant metabolism and growth and its sulfur content enhances nutrient uptake and promotes vibrant growth.

Ideal for Acidic Soils

It supplies nitrogen for lush foliage and overall vigor. Its fast-acting formula is perfect for improving plant health and correcting nitrogen deficiencies.

Planting Instructions

Kentucky Bluegrass, Ryegrass, Bermudagrass
During plating: Apply 1.5 pounds (3.0 cups) per 750 square feet
After planting: Every 6 weeks, apply 1.5 pounds (3.0 cups) per 750 square feet
Learn more about lawn & turf
Lettuce, Spinach, Kale, Cabbage
During planting: Incorporate 1 tablespoon per 5 square feet into the soil
After planting: Every 3 weeks, apply 1 tablespoon per 5 square feet
Discover more leafy greens
Apple, Pear, Azalea, Rhododendron
During planting: Apply 1 cup (16 tablespoons) per tree / shrub, spread evenly around the base
After planting: Every 4 weeks, apply 8 tablespoons per inch of trunk diameter
Discover more trees & shrubs
Peace Lily, Orchid, Snake Plant, Spider Plant
During plating: Apply 1 tablespoon per gallon of soil
After planting: Every 4 weeks, apply 1 tablespoons per gallon of soil
Learn more about potted plants and flowers

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Application Tips

1

Sprinkle the measured amount of fertilizer into the soil surface. Ensure the pellets are uniformly distributed around the base of the plant.

2

Cover the pellets with a thin layer of soil.

3

During Planting: water the area to help dissolve the granules, this ensures that the nutrients reach the root zone.

4

New Plants & Seedlings: water daily or every other day to keep the soil consistently moist until the plants are established.

5

Established Plants: water 1-2 times per week, following the recommended fertilizer application frequency.

Guaranteed Analysis

The Royal Roots 21-0-0 Formula

The NPK ratio refers to the three essential nutrients in fertilizers: Nitrogen (N) promotes leaf and stem growth, Phosphorus (P) supports root and flower development, and Potassium (K) enhances plant health, stress tolerance, and disease resistance.

Tech Specs

Total Nitrogen (N) 21.0%
21.0% Ammoniacal Nitrogen

Available Phosphate (P2O5) 0.0%

Soluble Potash (K2O) 0.0%

Sulfur (S) 24.0%
24.0% Combined Sulfur

Derived from: Ammonium Sulfate

Safety Precautions

Follow all label instructions and recommended rates to avoid over-fertilization.
Store fertilizers in a dry, cool place away from children and pets.