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Soil Amendments

About soil amendments

Whether you need to add organic matter, add nutrients, or balance your soil pH, we have the organic soil amendments you need.

Diamond K Solution Grade Gypsum (50 Lb)
Diamond K Solution Grade Gypsum (50 Lb)

F1153

$8.99 As low as: $7.19
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Monterey Manganese Sulfate 31% Powder (50 Lb)
Monterey Manganese Sulfate 31% Powder (50 Lb)

F1676

$49.99 As low as: $39.99
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Activate 80 Micronized Humate (30 Lb)
Activate 80 Micronized Humate (30 Lb)

F531

$89.99 As low as: $71.99
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Bat Guano Hi N 9-3-1 Powder (25 Lb Bag)
Bat Guano Hi N 9-3-1 Powder (25 Lb Bag)

F029

$55.99 As low as: $44.79
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Nutra Min - Sierra Mountain Minerals (30 Lb Bag)
Nutra Min - Sierra Mountain Minerals (30 Lb Bag)

F1796

$64.99 As low as: $51.99
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Bat Guano Hi N 9-3-1 (2 Lb Box)
Bat Guano Hi N 9-3-1 (2 Lb Box)

F012

$7.99 As low as: $7.19
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Maxicrop Kelp Extract (44 lb Bag)
Maxicrop Kelp Extract (44 lb Bag)

F1366

$399.00 As low as: $319.20
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Maxicrop Kelp Extract (Lb)
Maxicrop Kelp Extract (Lb)

F1360

$19.99
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Seabird Guano Hi P 1-10-0 Powder (20 lb bag)
Seabird Guano Hi P 1-10-0 Powder (20 lb bag)

F1937

$37.99 As low as: $30.39
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Azomite - Micronized (2 lb)
Azomite - Micronized (2 lb)

F039

$4.99 As low as: $3.99
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Micro Hume (2 Lb Jar)
Micro Hume (2 Lb Jar)

F520

$9.99 As low as: $7.99
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Seabird Guano Hi P 1-10-0 (40 Lb Bag)

F1939

$64.99 As low as: $51.99
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Seabird Guano Hi P 1-10-0 (5 Lb Box)
Seabird Guano Hi P 1-10-0 (5 Lb Box)

F1938

$12.99 As low as: $11.69
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Seabird Guano Hi N 12-12-2 (5 Lb Box)
Seabird Guano Hi N 12-12-2 (5 Lb Box)

F1932

$14.99 As low as: $13.49
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