Osmocote 15-9-12 Smart-Release Plant Food Plus Outdoor & Indoor - 8 lb

  • Works with virtually all plant varieties
  • Feeds up to 6 full months
  • No-burn pledge when used as directed
Availability: In stock


Its 6 month, 15-9-12 formula has become the industry standard for slow-release plant food. Often imitated but never equaled, Outdoor & Indoor feeds throughout the plant's active growing season without risk of chemical burn.

  • Each granule is coated with a unique resin that controls nutritional release so that plants get what they need, when they need it
  • All-in-one granules contain all three major nutrients (NPK) that are vital to plant nutrition
  • For outdoor & indoor
  • Feeds up to 6 full months
How to use

For outdoor use, sprinkle evenly across areas to be fed and work into the top 1-3" of soil. When transplanting annuals from flats or when re-potting, mix into the soil and growing media at the bottom of the hole before planting. Water.

When to apply

Apply to outdoor plants every 6M during the growing season. Can be applied to indoor plants, also every 6M, year-round.

How often to apply

Reapply every 4 months.

Where to use

Apply with confidence to potted plants, indoors or outdoors.

Coverage area

Established annuals and perennials: Sprinkle 3 tablespoons for every 2' X 2' area. Work into top 1-3" of soil or mulch.


Reentry may be achieved after you have watered in the product and the area has dried.

Shelf Life

Product will last for many years (+8) as long as the prills remain dry.

  • Size: 8 lb
  • Longevity: Feeds up to 6 months
  • Fertilizer analysis: 15-9-12
  • Packaging Type: Bag

Technical Sheet.pdf


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