Neptune's Harvest

Neptune's Harvest liquid is an all-natural, organic, fish-based fertilizer formulated from several breeds of fish for the most balanced soil nutrients possible. It's far superior to a fish emulsion comprised of only one type of fish.


One reason Neptune's Harvest outshines all other chemically created plant foods is because it utilizes a cold process to break the fish down into simpler protein complexes, resulting in a stable, highly concentrated liquid fertilizer. This process retains over 60 different nutrients critical to plant growth. Since no oils or proteins are removed, these nutrients stay in the soil longer, to be utilized as your plants need them. No synthetic materials or inorganic nitrogen has been added.


Neptune's Harvest Fish & Seaweed Fertilizer has been shown to increase germination, increase crop hardiness, enhance plant development and encourage the rapid development of a healthy root system. In fact, because Neptune's Harvest promotes naturally higher sugar content in garden plants, many growers have reported higher yields and extended shelf life for their fruits and vegetables. It also promotes the growth of beneficial, healthy bacteria to create less-compacted soil that holds moisture better. Over time you will see a marked difference in the quality of your soil when using Neptune’s Harvest.


Neptune’s Harvest Liquid Fish & Seaweed Fertilizer is OMRI-approved for organic gardening.

Show product details for Neptune's Harvest Fish & Seaweed Fertilizer—Gallon

Neptune's Harvest Fish & Seaweed Fertilizer—Gallon

Price $40.98

List Price: $45.50

You Save: $4.52 (10%)

Neptune's Harvest Fish & Seaweed Fertilizer provides you with the perfect emulsion of fish and seaweed, ensuring a complete organic fertilizing program in one bottle. One Gallon of Neptune’s Harvest Fish & Seaweed Fertilizer makes 128 gallons of 2-3-1 organic fertilizer. University studies have shown Neptune’s Harvest to consistently outperform 20-20-20 chemical fertilizers.

Show product details for Neptune's Harvest Fish & Seaweed Fertilizer—Quart

Neptune's Harvest Fish & Seaweed Fertilizer—Quart

Price $15.99

List Price: $26.50

You Save: $10.51 (40%)

One quart of Neptune’s Harvest Fish & Seaweed Fertilizer makes 32 gallons of 2-3-1 organic fertilizer.

Show product details for Neptune's Harvest Fish & Seaweed Fertilizer—Pint

Neptune's Harvest Fish & Seaweed Fertilizer—Pint

Price $11.20

List Price: $15.50

You Save: $4.30 (28%)

One pint of Neptune’s Harvest Fish & Seaweed Fertilizer makes 16 gallons of 2-3-1 organic fertilizer.

Show product details for Neptune's Harvest Fish & Seaweed Fertilizer—5-Gallon Bucket

Neptune's Harvest Fish & Seaweed Fertilizer—5-Gallon Bucket

Price $129.00

List Price: $149.99

You Save: $20.99 (14%)

Five gallons of Neptune’s Harvest Fish & Seaweed Fertilizer makes 640 gallons of 2-3-1 organic fertilizer.