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

Where to Buy

Which retailers carry Osmocote® Products?

Find a retailer near you.

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 http://www.regulatory-info-sc.com
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

To write a review you'll need to login or register

Write a Review
Outdoor & Indoor

Product Ratings (25 customer reviews)

Overall
54321 5.0/5
Product Efficacy
54321 5.0/5
Product Convenience
54321 5.0/5
Product Value
43210 4.9/5
Osmokote March 12, 2017
My mother-in-law introduced me to your product before I was even married. I have been using it ever since 1978 and love it!
54321 5/5
54321 5/5
54321 5/5
54321 5/5
Retired Nurse, President Oak Hills Garden Club, Butler, Pa. March 08, 2017
This is my absolute favorite plant food! I have been using it for all my indoor house plants for about four years, and they look amazing. My spider plants have the most wonderful extensions of babies. The schefflera's color and growth have been fantastic. I sprinkle some granules in when planting annuals, and it gives them a boost for a good start. Osmocote has provided samples for our Garden Club's annual plant sale. I have heard wonderful comments regarding this product from many people. HIghly recommended!!!
54321 5/5
54321 5/5
54321 5/5
54321 5/5
Master Gardener BJSeem February 22, 2017
I really love the ease and convenience of using Osmocote Outdoor & Indoor Plant Food. It gives all my container plants a nice boost. I also work it into the soil on the in ground plants and it does help them also.
54321 5/5
54321 5/5
54321 5/5
54321 5/5
Outdoor and Indoor February 08, 2017
Osmocote is a great product. Over the years, I have used both on indoor and outdoor container plants. What I like is it is released slowly. My plants and I are very happy with Osmocote and the great results we get with this fertilizer.
54321 5/5
54321 5/5
54321 5/5
54321 5/5
Mississippi Master Gardener/That Gardenin' Guy August 03, 2016
I grow off and sell Japanese Maples and pollinator plants. I also mix it in with the soil when I am planting seeds. I like the convenience of fertilizing once a season with a slow release fertilizer and also it not washing out with regular watering of pots. Osmocote is especially beneficial to Japanese Maples as they do not like fast fertilizers. This a cost effective method of fertilization for me and the plants love it.
54321 5/5
54321 5/5
54321 5/5
54321 5/5
Osmocote Smart-Release Plant Food July 22, 2016
I find this product very convenient to use and my plants seem to be doing beautifully. The granules are easy to see in the soil and I don't worry too much about getting it on the leaves or flowers. I also like the slow-release of the nutrients. All around a very good choice!
54321 5/5
54321 5/5
54321 5/5
54321 5/5
Great Product! July 08, 2016
My family has owned and operated a retail greenhouse operation for 27 years and they have always used Osmocote products with great success.
54321 5/5
54321 5/5
54321 5/5
54321 5/5
Giving out Osmocote Plus Samples at Plant Sale for Lewis & Clark Garden Club June 19, 2016
Thank you so much for the samples. We gave them out at our plant sale and all who bought our plants were given samples. We were so pleased as were they. Thank you so much for the samples. Grace Gorden
54321 5/5
54321 5/5
54321 5/5
54321 5/5
Makes a Difference! January 13, 2016
I've been using Osmocote for over 20 years...I don't plant ANYTHING without it! In the ground...in planters... I prefer to use the 8-9 month variety, so it lasts longer! I live in Kansas City, so that one covers me for the whole season!
54321 5/5
54321 5/5
54321 5/5
54321 5/5
Getting ready for the move outside. March 30, 2015
I have prepared all of my indoor plants for going outside in the next 4-6 weeks. In Michigan, we only get 4-5 months of outdoor growing so it is important to jump start it with a time release fertilizer. Bigger Blooms and outstanding plants are expected.
54321 5/5
54321 5/5
54321 5/5
54321 5/5
Page 2 of 3 pages  < 1 2 3 >