Fortified with STEP Hi-Mag Nutrients!
This Osmocote fertilizer blend contains nitrogen (19%), phosphorus (5%), and potassium (8%) along with high amounts of magnesium (1.5%) and sulfur (8.1%). Osmocote fortifies this fertilizer with STEP Hi-Mag micronutrients. This slow-release fertilizer is water-soluble. Each bag contains 50 pounds of fertilizer.
Osmocote 19-5-8 is great for general purpose outdoor production. It offers a consistent release over 8 to 9 months and across a wide range of temperatures. Its dual-coated design reduces nitrogen leeching and decomposes with minimal environmental impact. You can incorporate 19-5-8 directly into the growing media or apply it as a top dress. See application rates below.
Osmocote designed this fertilizer to be both effective and affordable. It delivers nutrients in a highly efficient manner. This process results in robust growth and maximum yields.
- Guaranteed analysis: Nitrogen (19.00%), phosphorus (5.00%), potassium (8.00%), magnesium (1.50%), calcium (1.60%), sulfur (8.10%), iron (1.00%), copper (0.06%), and zinc (0.13%)
- Bag weight (pounds): 50
- Release time (months): 8 to 9

- This product is covered under A.M. Leonard’s exclusive 30-Day Down to Earth Guarantee. Click Here for more Details.
- General purpose fertilizer
- Slow release
- Water soluble nutrients
- Fortified with STEP Hi-Mag micronutrients
- Affordable and efficient
- Ideal for general-purpose outdoor production
- Dual coating reduces nitrogen leeching and decomposes with minimal environmental impact
- Highly efficient nutrient delivery results in robust growth and maximize yields
Osmocote 19 5 8 Slow Release Fertilizer Fortified with STEP Hi Mag Nutrients contains nitrogen (19%), phosphorus (5%), potassium (8%), magnesium (1.5%), sulfur (8.1%), calcium (1.6%), iron (1.0%), copper (0.06%), and zinc (0.13%).
How long does the slow release feature of Osmocote 19 5 8 last?
The slow release feature of Osmocote 19 5 8 lasts for 8 to 9 months.
What type of outdoor gardening is Osmocote 19 5 8 ideal for?
Osmocote 19 5 8 Slow Release Fertilizer Fortified with STEP Hi Mag Nutrients is great for general purpose outdoor production.
What are the benefits of using Osmocote 19 5 8 Slow Release Fertilizer Fortified with STEP Hi Mag Nutrients?
The benefits of using Osmocote 19 5 8 Slow Release Fertilizer Fortified with STEP Hi Mag Nutrients include: (1) consistent release over 8 to 9 months, (2) dual coated design that reduces nitrogen leeching and decomposes with minimal environmental impact, (3) highly efficient nutrient delivery that results in robust growth and maximize yields, and (4) affordability.
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