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🌿 Unlock Nature’s Secret Growth Elixir — Your Plants Will Thank You!
Neptune's Harvest Fish Fertilizer (2-4-1) is an organic liquid plant food made from 100% North Atlantic ocean fish using a unique cold hydrolysate process that preserves essential nutrients. This fertilizer delivers a balanced NPK ratio plus micronutrients, amino acids, enzymes, and omega oils to boost plant growth, improve soil health, and enhance crop quality. Safe for indoor and outdoor use, it supports vegetables, flowers, trees, and lawns while promoting sustainable soil microbiome and moisture retention.











































| ASIN | B009L8ZHVY |
| Best Sellers Rank | #3,742 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #157 in Garden Fertilizers |
| Brand | Neptune's Harvest |
| Brand Name | Neptune's Harvest |
| Coverage | Medium |
| Customer Reviews | 4.7 out of 5 stars 2,970 Reviews |
| Global Trade Identification Number | 00081435018129, 00791516963896 |
| Included Components | Neptune's Harvest Fish Fertilizer 2-4-1, 18 Ounce |
| Item Form | Liquid |
| Item Type Name | Neptune's Harvest Fish Fertilizer 2-4-1, 18 Ounce |
| Item Weight | 1 Pounds |
| Liquid Volume | 473 Milliliters |
| Manufacturer | Neptune's Harvest |
| Mixing Ratio | 1:300 or 2:300 |
| Model Number | HF118 |
| Part Number | HF118 |
| Specific Uses For Product | Organic,Plant Food |
| Target Species | plants |
| UPC | 791516963896 617407739633 081435018129 |
| Unit Count | 144.0 Ounce |
| Warranty Description | Warranty |
A**R
Super stinky stuff that’s worth it’s weight in gold.
Make no mistake - you do not want to touch it. Haha. I’ve set this up on a timer drip system for landscaping and garden now in two different properties. It’s amazing stuff. Plants loooove it. Water early morning for just 10 minutes and within a week, plants take off. Now it’s set to water it in every 3 days. Just remember - it smells horrid - so do not plan to touch it and then not scrub yourself down (which is why ours is on an automated drip system). Have recommended it to friends and everyone has had amazing results. They have a smaller size if you want to try it out but I’m sure once you set it up so you don’t have to touch it, you’ll be hooked too. Happy gardening!
M**O
These fertilizers are great
i've been using neptune fish fertilizers for awhile, when my plants look a little limp and maybe overwatered, these help revive plants. I use them on my avocado trees, my blueberry plants and other vegetables and they all do well when i feed them a twice sometimes more a year watering with this concentrated fertilizer. Yes it smells, but it works. It's interesting that a broken down animal like fish can fertilize a plant, like it feeds on the protein, so not sure how it works, but just found it interesting and great that it works so well.
D**J
A great fertilizer for nearly all plants...!
This is a great fertilizer for nearly all plants (succulents and cacti not so much).
D**N
Easy, clean organic nutrients! Prices have increased recently though
I used to buy this brand's other product, the combined Fish and Seaweed liquid fertilizer. Buying the fish fertilizer and kelp fertilizer separately really helps you customize which nutrients to feed your soil/plants at various life stages. For this fish fertilizer, it is mild but plants actually love that in a fertilizer! Fish hydrolysate(what this product is) is actually supplying your plants with an abundance of amino acids. For the supplied amino acids, your plant now gets to skip making their own (which requires time and energy) and will graciously take this free energy and food and flourish! You don't have to worry about burning your plants with this product. I use it either every third or fourth watering for seedlings. I like to also use this brand's seaweed (or is it kelp?) Liquid in conjunction usually. This helps prevent any early issues and gives the plants a great start, and it's so gentle you don't have to worry about overdoing it and causing issues with young seedlings. I can't think of other fertilizers that you can apply to very young plants and not have to worry about overdoing things. If you applied even heavily diluted synthetic fertilizer you could easily burn your plants or kill seedlings. This is why so many experienced gardeners will tell you to use a weak soil and don't fertilize for quite some time until your seedlings are more established. This product is an exception to that rule because it is natural and gentle. For more established plants I would use this product in conjunction with higher strength organic fertilizers. Probably the most natural way to give your plants nutrients would be to top dress some organic fertilizer and add this product to your water and water those amendments in. I haven't discovered a time when this product causes any issues at all, and the plants seem to love it!
G**.
Fish Fertilizer
Took a couple weeks before it arrived, but so did everything else from diff sellers so that's ok. I've done a lot of research on fish fertilizers so I now know the diff between this "cold-pressed", and the emulsified stuff. I really like this so far. Since I have to "Top-Dress" every 4 weeks, I like to use this every other week because the nutes are soluble and that means my plants can feed right away while the microbes are slowly breaking down everything else. I've had absolutely no deficiencies this whole grow. Very impressed! Just shake it up real good before every application. The smell is not bad at all. Smells exactly like catfish bait and it doesn't smell up my grow room. I would choose this stuff every time!
M**X
Works great !
Smell is rough but there is a noticeable difference in the plants fertilized with this stuff a little really goes a long way . I would purchase again tomato and strawberry plants had wayyyy more activity
A**O
Great product
This is amazing! Highly recommended. I shared some with family and they were also pleased
D**R
If you only buy one garden fertilizer
My go-to fertilizer for planting my vegetable seedlings as well as maintaining everything I grow
R**Y
what you want to use it on
great product
L**A
Excellent fertilizer
I’ve used this fertilizer now for the last two years and bought it again this year, because I found it works very well with my vegetables. I would recommend to a friend…
J**A
I recommmend
The delivery was speedy, and the product works as directed.
T**I
Great fertilizer
Seedlings loved this fertilizer!
U**C
Good product
Great for vegetable and flower garden. Quality is pretty good.
Trustpilot
2 weeks ago
1 month ago