The Osmocote® Difference

An all-in-one solution for the serious gardner. One application contains 11 essential nutrients and feeds up to 6 months. Works with virtually all plant varieties and growing conditions. Each granule is coated with a unique resin that controls nutritional release. Plants get what they need, when they need it.

Outdoor & Indoor Plus

4.97/5 (101 reviews)
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"I tried osmocote for free. However this is an honest review. My plants look great. Ok ne thing I really..."

- celica125

Where to Buy?

Click to find Osmocote® Products online or in a store near you.

Osmocote® Smart-Release® Plant Food Plus Outdoor & Indoor

NPK Analysis: 15-9-12 + Micronutrients

Available In Three Sizes



Feeds up to 37 sq. ft., 19 gallons of potting soil.
Where to Buy



Feeds up to 75 sq. ft., 38 gallons of potting soil
Where To Buy



Feeds up to 300 sq. ft., 151 gallons of potting soil
Where to Buy

Osmocote® Smart-Release® Plant Food Plus Outdoor & Indoor Formula

Guaranteed Analysis
  • Total Nitrogen(N)15%
    • 8.4% Ammoniacal Nitrogen
    • 6.6% Nitrate Nitrogen
  • Available Phosphate(P205)9%
  • Soluble Potash(K20)12%
  • Magnesium(Mg)1.3%
    • 0.9% Water Soluble Magnesium (Mg)
  • Sulfer(S)6.0%
    • 6.0% Combined Sulfer (S)
  • Boron(B)0.02%
  • Copper(Cu)0.05%
    • 0.05% Water Soluble Copper (Cu)
  • Iron(Fe)0.05%
    • 0.09% Water Soluble Iron (Fe)
    • 0.01% Chelated Iron (Fe)
  • Manganese(Mn)0.06%
    • 0.06% Water Soluble Manganese (Mn)
  • Molybdenum(Mo)0.02%
  • Zinc(Zn)0.05%
    • 0.019% Water Soluble Zinc (Zn)

Derived from: Polymer-Coated: Ammonium Nitrate, Ammonium Phosphate, Potassium Sulfate, Magnesium Sulfate, Sodium Borate, Iron Phosphate, Iron EOTA, Manganese Sulfate, Sodium Molybdate, Aibc Sulfate, Copper Sulfate and Zinc Oxide.

†The Nitrgoen, Phosphate, Potash, Magnesium, Sulfer, Boron, Iron Manganese, Molybdenum, and Zinc sources have been coated to provide 12.7% coated slow-release Nitrogen(N), 7.6% coated slow-release Available Phosphate (P2O5), 10.2% coated slow-release Soluble Potash (K2O), 1.1% coated slow-release Magnesium (Mg), 5.1% coated slow-release Sulfer (S), 0.015% coated slow-release Boron (B), 0.35% coated slow-release Iron (Fe), 0.05% coated slow-release Manganese (Mn), 0.015% coated slow-release Molybdenum (Mo), 0.015% coated slow-release Zinc (Zn).

Information regarding the contents and levels of metals in this product is available on the internet at

WARNING: This fertilizer contains molybdenum (Mo). The application of fertilizer materials containing molybdenum (Mo) may result in forage crops containing levels of molybdenum (Mo) which are toxic to ruminant animals.

How Does Osmocote® Plant Food Work?

Osmocote® Plant Food consists of a homogeneous nutrient prill coated with a semi-permeable resin derived from linseed oil.

The coating utilizes the natural principle of osmosis. Moisture in the soil penetrates the coating and dissolves the nutrients in the prill.

Nutrients are released at the same rate the plant’s root system takes-up nutrients from the soil, neither under or over-feeding the plant.

How to Apply Osmocote® Plant Food

(1 scoopful = 3 tablespoons)

Spread 1 scoopful of plant food per 2 gallons of potting soil or per 4 sq. ft.

Mix into top 1-3
inches of soil

Reapply plant food
every 6 months

“Here’s the product information you’ll want to know”

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