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

Package Sizes and Coverage

1 lb. Bottle
Feeds up to 37 sq ft or 19 gallons of potting soil
2 lb. Bottle
Feeds up to 75 sq ft or 38 gallons of potting soil
8 lb. Bag
Feeds up to 300 sq ft or 151 gallons of potting soil

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Guaranteed Analysis

Osmocote® Smart-Release® Plant Food Plus Outdoor & Indoor 15-9-12
Guaranteed Analysis F643
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.
Longevity at the following average media (soil) temperatures
60° F 6-7 mo.
70° F 5-6 mo.
80° F 4-5 mo.
90° F 3-4 mo.

Ratings and Reviews

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Outdoor & Indoor

Product Ratings (25 customer reviews)

54321 5.0/5
Product Efficacy
54321 5.0/5
Product Convenience
54321 5.0/5
Product Value
43210 4.9/5
Keeps My Patio Containers Going All Season Long February 05, 2015
I use this product in my outdoor containers. Last summer there were 24 of them so mixing water soluble fertilizer to feed them is very time consuming. Using the Osmocote Plus is a quick and easy way for me to keep my containers happy for the season.
54321 5/5
54321 5/5
54321 5/5
54321 5/5
Easiest way to fertilize January 04, 2015
Great for those of us who have a hard time remembering to fertilize. Just mix in soil and plants are well-fed for six months! Also, I love this formula because, in addition to Nitrogen, Phosphorous, and Potassium, it includes many micro-nutrients that plants need to thrive.
54321 5/5
54321 5/5
54321 5/5
54321 5/5
Superb December 17, 2014
Two Thumbs Up!
54321 5/5
54321 5/5
54321 5/5
54321 5/5
Professional Gardener December 11, 2014
Love this product - I have never burned my plants using Osmocote and it is the perfect fertilizer for potted plants because I can't always remember to fertilize when needed.
54321 5/5
54321 5/5
54321 5/5
54321 5/5
Try it. You'll like it. November 20, 2014
When putting transplants into my container garden area [multiple half barrels]a spoon of Osmocote goes in with each plant. I use it every time.
54321 5/5
54321 5/5
54321 5/5
54321 5/5
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