Extended-release, Maximum growth, and blooms, all-in-one plant food. Osmocote Plus Outdoor & Indoor Plant Food. #1 Selling Plant Food! Details: An all-in-one solution. Easily feed all of your potted plants for up to 6 months. This slow-release fertilizer will increase the growth and blooms of your container plants. It supplies 11 essential nutrients to keep your plants looking their best. Works with virtually all plant types.