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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.

42 Results

Neptune's Harvest Tomato & Vegetable
Neptune's Harvest Tomato & Vegetable Pint

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

Neptune's Harvest

from $21.00

Unit price
per 

Neptune's Harvest Organic Fish & Seaweed Blend Organic Fertilizer
Neptune's Harvest Organic Fish & Seaweed Blend Pint 18 Ounce Organic Fertilizer

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

Neptune's Harvest

from $20.00

Unit price
per 

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

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

Neptune's Harvest

from $21.25

Unit price
per 

Neptune's Harvest Hydrolyzed Fish
Neptune's Harvest Hydrolyzed Fish Pint 18 Ounce

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

Neptune's Harvest

from $19.50

Unit price
per 

Neptune's Harvest Turf Formula Organic Fertilizer
Neptune's Harvest Turf Formula Organic Fertilizer 1 Gallon

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

Neptune's Harvest

from $59.25

Unit price
per 

Worm Power Granular Worm Castings Organic Fertilizer Worm Power
Worm Power Organic Worm Castings Vermicompost

Worm Power Granular Worm Castings

Worm Power

from $21.00

Unit price
per 

Organic Kelp Meal Neptune's Harvest
Organic Kelp Meal Neptune's Harvest 4 lb

Neptune's Harvest Kelp Meal

Neptune's Harvest

from $32.00

Unit price
per 

Microbe Life Hydroponics Terps Plus
Microbe Life Hydroponics Terps Plus Quart

Microbe Life Terps Plus

Microbe Life

from $61.25

Unit price
per 

All-In-One by Microbe Life Hydroponics
All-In-One by Microbe Life Hydroponics, 1 gallon
Free Shipping (Excludes 2.5 Gallon)

Microbe Life Hydroponics All-in-One Fertilizer

Microbe life

from $20.25

Unit price
per 

Neptune's Harvest Lawn Starter Organic Fertilizer
Neptune's Harvest Lawn Starter Organic Fertilizer 1 Gallon

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

Neptune's Harvest

from $59.25

Unit price
per 

Neptune's Harvest Organic Crab Shell Fertilizer
Neptune's Harvest Organic Crab Shell Fertilizer 4 lb

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

Neptune's Harvest

from $27.75

Unit price
per 

Neptune's Harvest Tomato & Vegetable Organic Seaweed Fertilizer
Neptune's Harvest Seaweed Plant Food 0-0-1 Organic Fertilizer Neptune's Harvest

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

Neptune's Harvest

from $19.75

Unit price
per 

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

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

GrowItNaturally.com

from $23.25

Unit price
per 

Nourish-L by Microbe Life Hydroponics
Nourish-L by Microbe Life Hydroponics, 1 gallon

Microbe Life Hydroponics Nourish-L Organic Humic Acid

Microbe life

from $22.75

Unit price
per 

Organic Approach SEP Organic Soluble Seaweed & Kelp Powder
Organic Approach SEP Organic  Soluble Seaweed & Kelp Powder

Soluble Seaweed Powder Nature's Essence SEP

Organic Approach

from $29.25

Unit price
per 

Azomite Soil Amendment Organic Fertilizer Organic Approach
Azomite 10 lb. Bag

Azomite Soil Amendment

Organic Approach

from $23.00

Unit price
per