Product Code


A90583 Osmocote Plus 15-9-12 Hi-start 8-9M

  • Advantages
  • Recommended Rates
  • Directions
  • Download Product Sheet
  • provides an extra boost of nutrition at the start of the growth cycle—recommended for fast growing spring crops and plants that put on a flush of growth early in the season
  • ideal for greenhouse and nursery container plants, foliage production and landscaping
  • provides a safe and consistent source of nutrition throughout the season
  • ICL’s Patterned Release Technology meets specific feeding cycles with unmatched consistency, efficiency and safety
  • can be incorporated into growing media or surface applied in the container
  • use alone or in combination with a water-soluble fertilizer
  • safe for sensitive crops
  • suitable for use with dibbling equipment
Recommended Rates


  Low Med High
Pounds per cubic yard 8.0 12.5 17.0
Kilograms per cubic meter 4.7 7.4 10.1
Grams per liter 4.7 7.4 10.1



  Low Med High
Pounds per 1000 square feet 12.5 22.0 31.0
Kilograms per 100 square meters 6.1 10.7 15.1
Pounds of nitrogen per 1000 square feet 2.0 3.5 5.0


Recommended rates are intended as a guideline only and may not be suitable for all regions and conditions. It is the responsibility of the grower to determine appropriate rates. Follow label instructions and use care when handling all fertilizer products.

  • verify product analysis, longevity and rate for plants in your production system (for assistance, contact your regional ICL-SF Territory Manager or call ICL-SF Customer Service at 800-492-8255)
  • consult rate tables printed on bag labels and product sheets
  • for incorporation, blend into growing media to ensure uniform distribution of cores
  • do not over-mix (doing so could damage fertilizer coating)
  • growing media should be used within two to four weeks after incorporating fertilizer
  • for top-dress applications, spread fertilizer evenly on container surface (avoid piling fertilizer directly against plant stem)
  • irrigate after application (irrigation frequency and volume should be adjusted during the crop production cycle according to crop type, environmental conditions and desired soluble salt levels)
  • a product trial is recommended before adopting a new fertilizer program or making full-scale changes to standard cultural practices (test several rates on representative plant types)
  • use caution when applying to plants being over-wintered under cover (if you can't monitor soluble salts and/or adjust irrigation practices, avoid Fall and Winter applications
  • store in a clean, cool, dry place
Download Product Sheet

Product Information Sheet

Download here


Delivers an extra boost of nutrition at the start of the growth cycle. Ideal for use on fast growing spring crops and early season bloomers. 100% resin-coated homogenous cores contain NPK plus essential micronutrients.