The Organic Advantage for Your Home Garden
Build a "living soil engine" for bigger blooms, healthier houseplants, and more robust vegetables. Made from fresh-caught North Atlantic fish right on the docks of Gloucester, MA, our cold-processed fertilizers give you professional-grade results right in your backyard.
Shop Organic FertilizersNot Your Average Fish Emulsion
Standard fish emulsions are cooked at high heat, which destroys vital nutrients and creates a putrid odor. At Neptune’s Harvest, we do things differently. Our unique cold-process hydrolysis preserves the naturally occurring vitamins, amino acids, and enzymes your plants need to thrive.
No Clogging
Thanks to our rigorous multi-step screening process, our liquid fertilizers work perfectly in fine-mist foliar sprayers and watering cans without sediment buildup.
Less Odor
Because we process fresh fish same-day at the dock, the putrid odors of decomposition are avoided. The mild, earthy scent dissipates rapidly after application.
Zero Waste
We utilize 100% of the fish leftover from filleting, turning an environmental hazard into a biological benefit.
Choose Your Organic Growth Program
Move beyond "one-size-fits-all" chemical feeding. Our core product lineup allows you to target exactly what your garden needs:
Hydrolyzed Fish Fertilizer (2-4-1)
The ultimate soil-builder. The perfect foundational fuel to promote beneficial bacteria and long-term soil health.
Shop Fish Fertilizer
Fish & Seaweed Blend (2-3-1)
Our best-selling complete nutritional program. Ideal for heavy-feeders like tomatoes and vegetables to promote both vegetative vigor and more blooms.
Shop Fish & Seaweed
Liquid Seaweed Plant Food (0-0-1)
A plant-health tonic rich in over 60 trace minerals. Perfect for foliar feeding, stress recovery, and houseplant care.
Shop Liquid Seaweed
Crab & Lobster Shell (5-3-0)
A slow-release dry amendment exceptionally high in calcium and magnesium. Great for improving soil structure and deterring soil-borne pests.
Shop Crab & Lobster ShellSimple Application for Maximum Results
Professional-grade inputs shouldn't be complicated to use. For our liquid fertilizers, simply follow this basic rule:
Dilution Rate
Mix 1 oz (2 tablespoons) of fertilizer per gallon of water.
Soil Drench
Apply every 1–2 weeks to establish a robust microbial colony in your soil.
Foliar Spray
Spray leaves directly in the early morning or late evening for maximum nutrient uptake and to avoid leaf scorch.
Trusted by Champion Growers & OMRI Listed
"Don't just take our word for it. In 2017, grower Woody Lancaster used Neptune’s Harvest to grow a 2,003.5 lb Giant Pumpkin—a Topsfield Fair winner. As Woody says: 'Won't grow without it!'"
Woody Lancaster
Champion Grower
For environmentally conscious home gardeners, peace of mind is essential. That's why our core products are OMRI Listed for use in organic production, assuring that our ingredients and processes comply with strict organic standards.
Start Cultivating Your Legacy Today
Feeding your plants is a seasonal task; feeding your soil is a legacy. Choose the biological advantage of Neptune’s Harvest.