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 The Andersons® Humic DG Granular Soil Conditioner (Humic Acid), 40lb Bag
    Rating:
    96%
    Soil Conditioner, Granular Humic DG (Humic Acid) by The Andersons
    $64.55
  2. 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
    $54.45
  3. Image 1 of the Terra-Sorb Hydrogel - Horticultural Grade - Bulk Sizes
    Rating:
    100%
    Terra-Sorb Hydrogel - Horticultural Grade - Bulk Sizes
    $113.75
  4. 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
    $138.50
  5. Image 2 of the The Andersons 25-0-3 Turf Fertilizer with 2% Iron, 50lb Bag
    Rating:
    100%
    Fertilizer, 25-0-3 Turf Formula with 2% Iron, 50lb Bag by The Andersons
    $69.25
  6. Image 1 of the Grotab 3-in-1 Premium Plant Starter (12-8-4)
    Rating:
    100%
    Grotab 3-in-1 Premium Plant Starter (12-8-4)
    $46.50
  7. Moisture-Loc Anti-Transpirant Spray
    Rating:
    100%
    Moisture-Loc Anti-Transpirant Spray
    $79.95
  8. 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
    $144.40
  9. Image 1 of the Terra-Sorb Hydrogel - Fine Grade
    Rating:
    100%
    Terra-Sorb Hydrogel - Fine Grade
    $109.98
  10. Image 1 of the ROOTS Healthy Start Advanced 3-4-3
    Rating:
    100%
    Healthy Start Advanced MRT Fertilizer, 3-4-3 with Mycorrhizal Fungi, 25lb Bag by Roots
    $60.20
  11. Image 1 showing A211MR5 bag on white background.
    Rating:
    100%
    Fertilizer, 21-0-4 Turf Formula with 0.2% Merit Insecticide, 50lb Bag by The Andersons
    $64.85
  12. Image 1 of the Terra-Sorb Hydrogel Super Absorbent Fine Grade 10lb Bag
    Rating:
    80%
    Hydrogel Super Absorbent Granules, Fine Grade, 10lb Bag by Terra-Sorb
    $109.98
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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.