Fertilizers & Treatments

Fertilizers & Treatments

Whether you're looking to have the perfect lawn or plant a large garden that thrives with a minimal amount of effort, A.M. Leonard has the fertilizers and treatments you need, including slow-release and organic fertilizers and rooting hormones.

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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
    $135.95
  2. Agriform 20-10-5 Fertilizer Tablets, 2 Year Formula, Box
    Rating:
    100%
    Agriform 20-10-5 Fertilizer Tablets, 2 Year Formula, Box
    $114.95
  3. 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
    $145.95
  4. 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
    $114.95
  5. 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
    $145.95
  6. 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
    $126.04
  7. 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
    $143.95
  8. 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
    $56.95
  9. Image 1 of the Peters Peat Lite Special Fertilizer, 20-10-20
    Rating:
    100%
    Fertilizer, Peat-Lite Special 20-10-20 by Peters Professional
    $65.95
  10. 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
    $151.95
  11. Image 1 of the Peters Professional General Purpose Fertilizer, 20-20-20
    Rating:
    95%
    Fertilizer, General Purpose 20-20-20 Formula by Peters Professional
    $73.95
  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
    $70.95
  13. Image 1 of the The Andersons 25-0-3 Turf Fertilizer with 2% Iron, 50lb Bag
    Rating:
    100%
    25-0-3 Turf Fertilizer Formula with 2% Iron, 50lb Bag by The Andersons
    $79.45
  14. Image 1 of the Terra-Sorb Hydrogel - Fine Grade
    Rating:
    100%
    Terra-Sorb Hydrogel - Fine Grade
    $110.95
  15. Image 1 of the Peters Peat Lite Blossom Booster Fertilizer, 10-30-20
    Rating:
    100%
    Fertilizer, 10-30-20 Peat Lite Blossom Booster, 25-Pound Bag by Peters Professional
    $109.95
  16. Image 1 of the MycoApply Soluble MAXX Mycorrhizae
    Rating:
    100%
    MycoApply Soluble MAXX Mycorrhizae, 1lb Bag
    $46.24
  17. Image 1 of the Florikan Meg Iron V Micronturient Mix
    Rating:
    100%
    Meg-Iron V Micronutrient Mix by Florikan
    $69.95
  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
    $148.95
  19. Image 1 of the PennMulch Seed Accelerator, 40 Pound Bag
    Rating:
    100%
    Penn Mulch, 40-Pound Bag
    $40.95
  20. Image 1 of the Fairlawn Blue and Rye Mix
    Rating:
    100%
    Fairlawn Blue and Rye Mix
    $32.95
  21. Image 1 of the HyR BRIX Fruit and Berry Fertilizer 50 Pound Bag
    Rating:
    100%
    Fruit and Berry Fertilizer, 45lb Bag by HyR BRIX
    $61.95
  22. Image 1 of the Innova 7 1 2 Organic Fertilzer 40 Pound Bag
    Rating:
    100%
    Organic Fertilizer, 7-1-2, 40lb Bag by Innova
    $61.95
  23. Image 1 of the HyR BRIX Vegetable Fertilizer, 45-Pound Bag
    Rating:
    100%
    Vegetable Fertilizer, 45lb Bag by HyR BRIX
    $66.95
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A.M. Leonard knows you want to grow the healthiest and most beautiful plants and lawn possible. When plants are at their healthiest, they reach their full size, greatest strength, and biggest yield. Our fertilizers, treatments, and plant food helps lawns and plants grow big, strong, and green as can be. Healthy plants simply look the best. They have the largest, most beautiful flowers and vibrant green leaves. They are the tallest trees that produce the most and best-tasting fruit. With strong roots and stems, healthy plants are also more resistant to anything that might harm them. No matter if you‘re growing a tree, a vegetable, or a flower, we have the plant food you need.

Slow-release fertilizers such as the Osmocote 14-14-14 are very popular products, offering a wide range of uses from greenhouse to planter and cutting down labor with their time-release formulas. We also carry plant and flower fertilizers including brands such as BioPlex and Grotab, lawn and grass fertilizers, and organic options as well. And when your plants and yards begin to thrive, keep it that way with our herbicides, fungicides, and insecticides.

If you're just getting started or preparing for your next task, we carry a range of greenhouse supples including grow lights and seed starting supplies, as well as nursery supplies including a variety of pots and ground cover options.