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Fertilizers & Amendments

Soil health is vital to what you grow or treat, and organic fertilizers provide a much wider array of nutrients plus organic matter than standard N-P-K only fertilizers, to build healthier soil, stimulate biology and increase health, yields and aesthetics.

43 Results

Quantum Growth 12 Humic Acid for Professionals

Quantum-12

GrowItNaturally.com

$36.25

Unit price
per 

Worm Power Liquid Extract Organic Worm Castings
Worm Power Liquid 55 Gallon Drum

Worm Power Liquid Extract

Worm Power

from $30.50

Unit price
per 

Organic Approach Encourage 11-0-4 Organic Amino Acids

Encourage 11-0-4 Water-Soluble Fertilizer

GrowItNaturally.com

from $26.00

Unit price
per 

Nectar For The Gods Zeus Juice Nectar for the Gods

Nectar For The Gods Zeus Juice

Nectar for the Gods

from $24.50

Unit price
per 

Potassium Sulfate Potash Potassium 0-0-50 44 lb. Box

Potash Potassium Granular 0-0-50

GrowItNaturally.com

$63.50

Unit price
per 

Verdanta PL-2 2-0-6 Liquid Organic Fertilizer
Free Shipping (Excludes 2.5 Gallon)

Verdanta PL-2 (2-0-6)

GrowItNaturally.com

from $48.00

Unit price
per 

Blood Meal Organic Fertilizer
Free Shipping

Blood Meal Powder 12-0-0

GrowItNaturally.com

$32.00

Unit price
per 

Mammoth Silica GrowItNaturally.com
Mammoth Silica GrowItNaturally.com

Mammoth Silica

GrowItNaturally.com

from $47.25

Unit price
per 

Mammoth Myco GrowItNaturally.com
Mammoth Myco GrowItNaturally.com

Mammoth Myco

GrowItNaturally.com

from $38.50

Unit price
per 

Neptune's Harvest Crab & Lobster Shell Flour (8-2.5-0.5) Organic Fertilizer Neptune's Harvest

Neptune's Harvest Crab & Lobster Shell Flour (8-2.5-0.5)

Neptune's Harvest

$75.25

Unit price
per 

BioWorks ON-Gard 5-0-0 BioWorks

BioWorks ON-Gard 5-0-0

BioWorks

$465.25

Unit price
per