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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.

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Neptune's Harvest Tomato & Vegetable
Neptune's Harvest Tomato & Vegetable Pint
Sale
Black Friday/Cyber Monday 2023

Neptune's Harvest Tomato & Vegetable Formula 2-4-2

Neptune's Harvest

$21.00 from $19.95

Neptune's Harvest Organic Fish & Seaweed Blend Organic Fertilizer
Neptune's Harvest Organic Fish & Seaweed Blend Pint 18 Ounce Organic Fertilizer
Sale
Black Friday/Cyber Monday 2023

Neptune's Harvest Fish & Seaweed Blend 2-3-1

Neptune's Harvest

$20.00 from $19.00

Neptune's Harvest Rose & Flowering Formula (2-6-4) Organic Fertilizer Neptune's Harvest
Neptune's Harvest Rose & Flowering Pint
Sale
Black Friday/Cyber Monday 2023

Neptune's Harvest Rose & Flowering Formula (2-6-4)

Neptune's Harvest

$21.25 from $20.19

Neptune's Harvest Hydrolyzed Fish
Neptune's Harvest Hydrolyzed Fish Pint 18 Ounce
Sale
Black Friday/Cyber Monday 2023

Neptune's Harvest Hydrolyzed Fish Fertilizer 2-4-1

Neptune's Harvest

$19.50 from $18.52

Neptune's Harvest Turf Formula Organic Fertilizer
Neptune's Harvest Turf Formula Organic Fertilizer 1 Gallon
Sale
Black Friday/Cyber Monday 2023

Neptune's Harvest Turf Formula 2-0-2 (No Phosphorous)

Neptune's Harvest

$59.25 from $56.29

Worm Power Granular Worm Castings Organic Fertilizer Worm Power
Worm Power Organic Worm Castings Vermicompost
Sale
Black Friday/Cyber Monday 2023

Worm Power Granular Worm Castings

Worm Power

$21.00 from $19.95

Organic Kelp Meal Neptune's Harvest
Organic Kelp Meal Neptune's Harvest 4 lb
Sale
Black Friday/Cyber Monday 2023

Neptune's Harvest Kelp Meal

Neptune's Harvest

$32.00 from $30.40

All-In-One by Microbe Life Hydroponics
All-In-One by Microbe Life Hydroponics, 1 gallon
Sale
Black Friday/Cyber Monday 2023

Microbe Life Hydroponics All-in-One Fertilizer

Microbe life

$20.25 from $19.24

Microbe Life Hydroponics Terps Plus
Microbe Life Hydroponics Terps Plus Quart
Sale
Black Friday/Cyber Monday 2023

Microbe Life Terps Plus

Microbe Life

$61.25 from $58.19

Neptune's Harvest Lawn Starter Organic Fertilizer
Neptune's Harvest Lawn Starter Organic Fertilizer 1 Gallon
Sale
Black Friday/Cyber Monday 2023

Neptune's Harvest Lawn Starter 2-3-2 (with Phosphorus)

Neptune's Harvest

$59.25 from $56.29

Neptune's Harvest Organic Crab Shell Fertilizer
Neptune's Harvest Organic Crab Shell Fertilizer 4 lb
Sale
Black Friday/Cyber Monday 2023

Neptune's Harvest Crab & Lobster Shell Pieces (5-3-0)

Neptune's Harvest

$27.75 from $26.36

Neptune's Harvest Tomato & Vegetable Organic Seaweed Fertilizer
Neptune's Harvest Seaweed Plant Food 0-0-1 Organic Fertilizer Neptune's Harvest
Sale
Black Friday/Cyber Monday 2023

Neptune's Harvest Seaweed Plant Food 0-0-1

Neptune's Harvest

$19.75 from $18.76

Neptune's Harvest Lobster & Crab Shell Liquid 2-0-2 GrowItNaturally.com
Neptune's Harvest Lobster & Crab Shell Liquid 2-0-2 GrowItNaturally.com
Sale
Black Friday/Cyber Monday 2023

Neptune's Harvest Lobster & Crab Shell Liquid 2-0-2

GrowItNaturally.com

$23.25 from $22.09

Nourish-L by Microbe Life Hydroponics
Nourish-L by Microbe Life Hydroponics, 1 gallon
Sale
Black Friday/Cyber Monday 2023

Microbe Life Hydroponics Nourish-L Organic Humic Acid

Microbe life

$22.75 from $21.61

Organic Approach SEP Organic Soluble Seaweed & Kelp Powder
Organic Approach SEP Organic Soluble Seaweed & Kelp Powder
Sale
Black Friday/Cyber Monday 2023

Soluble Seaweed Powder Nature's Essence SEP

Organic Approach

$29.25 from $27.79

Azomite Soil Amendment Organic Fertilizer Organic Approach
Azomite 10 lb. Bag
Sale
Black Friday/Cyber Monday 2023

Azomite Soil Amendment

Organic Approach

$23.00 from $21.85