Neptune's Harvest Fish Seaweed Blend Fertilizer 2-3-1
Best organic nutrient for robust garden growth.
Neptune's Harvest Fish Seaweed Blend Fertilizer 2-3-1 is a potent liquid organic fertilizer. This OMRI-listed formula combines fish hydrolysate and seaweed to enhance plant growth, leading to increased marketable yields and improved shelf life for fruits and vegetables. Growers observe that this blend effectively builds natural sugars, resulting in stronger, more vibrant foliage and flowers. It also promotes more abundant, fragrant, and longer-lasting blooms, making it a comprehensive choice for various gardening needs.
$37.99
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Owner Satisfaction
4.7
/ 5
Category Rank
50
/ 4425
#50 in Fertilizers
Price vs Category Average
-38%
Below average
NPK Ratio
231
/ --
Who it's for
- Gardeners seeking comprehensive, natural nourishment for diverse plants
- Eco-conscious growers prioritizing long-term soil vitality and fertility
- Organic gardeners and those committed to sustainable, chemical-free practices
Who should skip it
- Home gardeners sensitive to strong smells or applying indoors
- Experienced growers needing precise, high-concentration nutrient delivery
- Busy gardeners preferring ready-to-use or granular, slow-release fertilizers
Performance breakdown
Organic Certification
OMRI listing ensures total compliance for strict organic gardening standards.
Nutrient Balance
The 2-3-1 ratio provides a gentle, steady boost for diverse plantings.
Bloom Enhancement
Seaweed extracts significantly improve the longevity and fragrance of floral displays.
Application Versatility
Liquid formula allows for easy mixing across various soil and container types.
Yield Impact
Consistent use noticeably increases fruit size and overall harvest shelf life.
Foliage Vitality
Fish hydrolysate promotes deep green, resilient leaves throughout the growing season.
Key Specs
NPK Ratio
2-3-1
Weight
9.70 LBS
OMRI Listed
Form
Liquid
Nitrogen
2%
Phosphorus
3%
Potassium
1%
Features
- OMRI Listed for organic gardening
- Enhances marketable yields and shelf life
- Promotes stronger, more colorful flowers and foliage
- Encourages plentiful, fragrant, and long-lasting blooms
- Builds natural sugars in plants
What customers say
Customers overwhelmingly praise this fertilizer for its remarkable effectiveness in boosting plant health and growth. Users consistently report vibrant foliage, stronger root systems, and increased yields across various plant types. While the distinct fishy aroma is frequently noted, most gardeners consider it a small trade off for the exceptional results and the product's organic composition. Its ease of dilution and application further contributes to a highly positive user experience, making it a trusted choice for cultivating robust and thriving gardens.
Know before you buy
Yes, this formula is OMRI-listed, meaning it meets the standards for organic gardening and is safe to use on fruits, vegetables, and herbs.
The combination provides a broad spectrum of nutrients that help build natural sugars within the plant. This leads to stronger foliage, more vibrant flowers, and improved shelf life for your harvested produce.
You can use it on both. It is effective for indoor plants, container gardens, and outdoor landscapes, though you should ensure you follow the dilution instructions to avoid over-fertilizing.
Because it is a fish hydrolysate, there may be a mild, temporary scent of the ocean immediately after application. However, this dissipates quickly once the product is watered into the soil.
The 2-3-1 NPK ratio indicates a balanced supply of nitrogen, phosphorus, and potassium. The slightly higher phosphorus content is specifically beneficial for supporting root development and encouraging abundant, long-lasting blooms.
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$38