Slow Release Fertilizer

A.M. Leonard stocks a huge variety of effective slow and control release fertilizers fit for a variety of uses. From greenhouses to container plants, there is no shortage of applications that can benefit from timed-release fertilization techniques. A slow-release fertilizer over several months or years results in labor savings, a greater yield, more stable nutrition for your plants, and ultimately a more consistent growth quality. It is the perfect choice for professional landscapers, gardeners, and nursery workers looking for an economical alternative to water-soluble fertilizers.
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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
    $128.92
  2. Image 1 of the Osmocote Fertilizer 15-9-12 Slow Release 3 to 4 Months 50lb Bag
    Rating:
    100%
    Osmocote Plus 15-9-12 Slow-Release Fertilizer, 3 to 4 Month, 50lb Bag
    $139.86
  3. Agriform 20-10-5 Fertilizer Tablets, 2 Year Formula, Box
    Rating:
    100%
    Agriform 20-10-5 Fertilizer Tablets, 2 Year Formula, Box
    $102.24
  4. 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
    $125.46
  5. 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
    $137.45
  6. Image 1 of the Osmocote Fertilizer 15-9-12 Slow Release 8 to 9 Months 50lb Bag
    Rating:
    100%
    Osmocote Plus 15-9-12 Slow-Release Fertilizer, 8 to 9 Month, 50lb Bag
    $144.01
  7. Image 1 of the Agriform Fertilizer Tablets 21 Gram 20-10-5 2 Year Release 500 per Case
    Rating:
    100%
    Fertilizer Tablets, 21g, 20-10-5, 2-Year Release, Case of 500 by Agriform
    $102.24
  8. Image 1 of the Agriform Fertilizer Tablets 10 Gram 20-10-5 2 Year Release 1000 per Case
    Rating:
    100%
    Fertilizer Tablets, 10g, 20-10-5, 2-Year Release, Case of 1000 by Agriform
    $117.77
  9. 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
    $55.81
  10. Image 1 of the Osmocote 18 6 12 Slow Release Fertilizer
    Rating:
    100%
    Osmocote 18-6-12 Slow-Release Fertilizer
    $141.91
  11. 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
    $55.81
  12. 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
    $66.16
  13. 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
    $55.81
  14. Image 1 of the Florikan 14 14 14 NPK 90 Day Formula
    Rating:
    100%
    Fertilizer, 14-14-14 NPK, 90-Day Formula by Florikan
    $131.41
  15. 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
    $141.96
  16. Image 1 of the Florikan 16 5 11 NPK MAX with Nanoprill 90 Day Formula
    Rating:
    87%
    Fertilizer, 16-5-11 NPK Max with Nanoprill, 90-Day Formula by Florikan
    $150.27
  17. Image 1 of the Osmocote Fertilizer 15-9-12 Slow Release 5 to 6 Months 50lb Bag
    Rating:
    100%
    Osmocote Fertilizer 15-9-12 Slow Release 5 to 6 Months 50lb Bag
    $143.45
  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
    $148.01
  19. Image 1 of the Florikan Meg Iron V Micronturient Mix
    Rating:
    100%
    Meg-Iron V Micronutrient Mix by Florikan
    $67.36
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We stock slow-release fertilizers from top brands in the industry like Scott, Florikan, and NutriPak, plus our own premium-quality Leonard-brand products. Our customers love our selection of Leonard slow-release fertilizers. These time-release tablets provide trees, shrubs, and other plants with much-need nutrients at release rates of 3 months, 12 months, or 24 months. They are ideal for horticultural professionals seeking effective tree fertilization solutions at a great value.

Another option is our top-selling Florikan 3-4 Month Nano-Prill Time-Release Fertilizer, an advanced, economical controlled-release fertilizer that features a prill count ten times greater than standard controlled-release fertilizers. This is a safe and efficient solution to getting the most out of your grow operations.

Whatever your line of work or industry, there's no excuse to miss out on money- and time-saving techniques. Trust A.M. Leonard to deliver superior slow and control release fertilizers at competitive prices that you just can't ignore.