Slow Release Fertilizer

Coated and tablet fertilizers that feed steadily over months. Shop Control Release Fertilizer for season-long feeding, Fertilizer Tablets for planting-hole feeding, or Fertilizer Stakes for driven feeding.

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  1. Image 1 of the Osmocote 14-14-14 Slow Release Fertilizer
    Rating:
    99%
    Osmocote 14-14-14 Slow-Release Fertilizer, 3 to 4 Month, 50lb Bag
    $144.79
  2. FLK17511- Florikan 17-5-11 NPK Max 180 day fertilizer. Image 1 of 2. Showing Florikan 17-5-11 NPK Max 180 day fertilizer product shot against white background.
    Rating:
    100%
    Florikan 17-5-11 NPK Max 180 day fertilizer
    $91.75
  3. Agriform 20-10-5 Fertilizer Tablets, 2 Year Formula, Box
    Rating:
    100%
    Agriform 20-10-5 Fertilizer Tablets, 2 Year Formula, Box
    $127.25
  4. Image 1 of the Osmocote Fertilizer 15-9-12 Slow Release 3 to 4 Months 50lb Bag
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    Osmocote Plus 15-9-12 Slow-Release Fertilizer, 3 to 4 Month, 50lb Bag
    $154.99
  5. Image 1 of the Osmocote Fertilizer 15-9-12 Slow Release 8 to 9 Months 50lb Bag
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    Osmocote Plus 15-9-12 Slow-Release Fertilizer, 8 to 9 Month, 50lb Bag
    $158.05
  6. Image 1 of the Florikan® 17-5-11 NPK Max, 140-Day Formula
    Rating:
    95%
    NPK Max 17-5-11 Fertilizer, 140-Day Formula by Florikan
    $132.55
  7. Image 1 of the Agriform Fertilizer Tablets 21 Gram 20-10-5 2 Year Release 500 per Case
    Rating:
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    Fertilizer Tablets, 21g, 20-10-5, 2-Year Release, Case of 500 by Agriform
    $127.25
  8. Image 1 of the Agriform Fertilizer Tablets 10 Gram 20-10-5 2 Year Release 1000 per Case
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    Fertilizer Tablets, 10g, 20-10-5, 2-Year Release, Case of 1000 by Agriform
    $142.55
  9. Image 1 of the Florikan® 18-5-12 NPK Plus, 140-Day Formula
    Rating:
    100%
    NPK Plus 18-5-12 Fertilizer, 140-Day Formula by Florikan
    $142.75
  10. Image 1 of the Leonard 10-10-10 Tree Food for Evergreens and General Use, Box of 40 Stakes
    Rating:
    90%
    Fertilizer Stakes, 10-10-10 Formula for Evergreens and General Use, Box Of 40 Stakes by A.M. Leonard
    $67.27
  11. Image 1 of the Osmocote 19-5-8 Slow Release Fertilizer
    Rating:
    100%
    Osmocote Blend 19-5-8 Slow-Release Fertilizer, 8 to 9 Month, 50lb Bag
    $152.95
  12. Image 1 of the Leonard 15-7-6 Tree Food for Trees and Shrubs, Box of 40 Stakes
    Rating:
    100%
    Fertilizer Stakes, 15-7-6 Formula for Trees and Shrubs, Box Of 40 Stakes by A.M. Leonard
    $64.21
  13. Image 1 of the Florikan 14 14 14 NPK 90 Day Formula
    Rating:
    100%
    Fertilizer, 14-14-14 NPK, 90-Day Formula by Florikan
    $137.65
  14. Image 1 of the Leonard 8-16-16 Tree Food for Fruit and Ornamental Trees, Box of 40 Stakes
    Rating:
    100%
    Fertilizer Stakes, 8-16-16 Formula for Fruit and Ornamental Trees, Box Of 40 Stakes by A.M. Leonard
    $72.37
  15. Image 1 of the The Andersons® Humic DG Granular Soil Conditioner (Humic Acid), 40lb Bag
    Rating:
    96%
    Soil Conditioner, Granular Humic DG (Humic Acid) by The Andersons
    $74.41
  16. Image 1 of the Florikan 20 4 9 NPK Plus 180 Day Formula
    Rating:
    100%
    Fertilizer, 20-4-9 NPK Plus, 180-Day Formula, 50lb Bag by Florikan
    $147.85
  17. Image 1 showing outline shot of bag.
    Rating:
    100%
    NUTRICOTE 18-6-8 270 DAYS TOTAL 50 LBS
    $135.61
  18. Image 1 of the Florikan 12 4 11 NPK Plus with CaNO3 180 Day Formula
    Rating:
    100%
    Fertilizer, 12-4-11 NPK Plus with CaNO3, 180-Day Formula by Florikan
    $106.03
  19. NC18682703S Image 1 of 2. NUTRICOTE 18-6-8 270 DAYS  3 STAGE TOTAL 50 LBS
    Rating:
    100%
    NUTRICOTE 18-6-8 270 DAYS 3 STAGE TOTAL 50 LBS
    $139.69
  20. Image 1 of the Osmocote Fertilizer 15-9-12 Slow Release 5 to 6 Months 50lb Bag
    Rating:
    100%
    Osmocote Plus Fertilizer 15-9-12 Slow Release 5 to 6 Months 50lb Bag
    $162.13
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Slow-Release Fertilizer FAQ

How does slow-release fertilizer work?

Slow-release (controlled-release) fertilizer delivers nutrients gradually over weeks or months as the coating or material breaks down, rather than all at once. This gives even, sustained feeding that matches plant uptake, reduces burn risk, and means fewer applications. The gradual release is what makes it efficient and forgiving compared to quick-release products that surge and fade.

What are the advantages of slow-release over quick-release fertilizer?

Slow-release provides steady feeding, lower burn risk, fewer applications, and less nutrient loss to leaching than quick-release, which greens fast but is short-lived and can burn if over-applied. For consistent growth and reduced labor and waste, slow-release is preferred in many professional programs. Quick-release suits a fast correction; slow-release suits sustained, even feeding.

How long does slow-release fertilizer last?

Release duration varies by product, commonly several weeks to several months, with some formulated for a full growing season. The longevity is matched to the application: container stock, trees, and turf programs use durations suited to their feeding needs. Choosing a product whose release period matches how long you need feeding to last is the key to using it effectively.

When should I use slow-release fertilizer?

Slow-release fertilizer suits situations favoring steady feeding and reduced labor: container and nursery stock, tree and shrub feeding, and turf programs where consistent growth and fewer applications matter. Apply it ahead of the period when plants need the nutrients, since it releases gradually. For sustained feeding with less burn risk and labor, slow-release is well-matched to professional growing and landscape work.

Can slow-release fertilizer burn plants?

Slow-release fertilizer carries much lower burn risk than concentrated quick-release products because it releases nutrients gradually, but it is not entirely burn-proof, and following the label rate still matters. The controlled release makes it forgiving, which is a key advantage for container and landscape feeding, but proper application rate remains important for the best and safest results.

Can slow-release fertilizer be ordered in bulk?

Yes. Slow-release and controlled-release fertilizers are stocked in bulk and commercial quantities with volume pricing by quote. Operations feeding container stock, trees, and turf across a season benefit from ordering in volume, choosing release durations matched to their crops and applications for consistent feeding and pricing.