The nutrients are encapsulated within multiple layers of polymeric resin. Water vapor penetrates the shell and dissolves the nutrient core into the surrounding soil/media.
How Osmocote Works
Review Summary (Based on 4 Reviews)
Customer Reviews for Scotts® Osmocote® Plus Topdress Fertilizer, 50lb Bag, 8 Formulas
I've been putting Osmocote on my Hostas every year for about ten years. The growth rate before was slow but now I have size jumps in plants that are hard to believe. Double, triple and even quaddrouple in a year time. I feed in early spring and again in mid-summer.
This is a great fertilizer for southern climates and use on trees and shrubs for all seasons. It effectively provides nutrition for all plantings while limiting shock like many products that are quick release.
Expensive, but worth it! Apply it when you plant, and your done with fertilizing until very late in the summer. It lasts a good three months, and it keeps the annuals covered with blooms! Master Gardener from DeWitt, MI
I live on a sandy hill- fertilizer does not last long--also I do not have to guess about rain as much. Some will still be there to next rain.
Proven controlled release formulas for greenhouse crops, nursery stock and landscaping. Scotts offers a complete line of controlled release fertilizers engineered to help deliver bigger, greener plants. Only one application of fertilizer is needed for the season. These granular formulas are coated with a film of plastic resin. Osmocote, Osmocote Plus and Scotts Topdress are packaged in 50 lb bags.