To see product details, add this item to your cart. You can always remove it later.
FREE Returns
Added to

Sorry, there was a problem.

There was an error retrieving your Wish Lists. Please try again.

Sorry, there was a problem.

List unavailable.
Other Sellers on Amazon
Added
Sold by: Monster Pets
Sold by: Monster Pets
(202578 ratings)
99% positive over last 12 months
Shipping rates and Return policy
Added
Sold by: Azaan Traders
Sold by: Azaan Traders
(6 ratings)
100% positive over lifetime
Shipping rates and Return policy
Added
Sold by: Harry Potter LLC
Sold by: Harry Potter LLC
(5 ratings)
100% positive over last 12 months
Shipping rates and Return policy

Neptune's Harvest Seaweed Fertilizer 0-0-1 (36 Ounce)

4.7 4.7 out of 5 stars 981 ratings

To see product details, add this item to your cart. You can always remove it later.
FREE Returns
36 Ounce

Purchase options and add-ons

Brand Neptune's Harvest
Item Weight 2 Pounds
Item Form Liquid
Coverage Medium
Liquid Volume 36 Fluid Ounces

About this item

  • Neptune's Harvest seaweed plant food is made from seaweed (ascophyllum nodosum)
  • Sourced from north Atlantic ocean
  • It is an excellent addition to Neptun’s harvest fish fertilizer, or any fertilizing program

Additional Details

Small Business
Shop products from small business brands sold in Amazon’s store. Discover more about the small businesses partnering with Amazon and Amazon’s commitment to empowering them.

Small Business
This product is from a small business brand. Support small. Learn more

Customer ratings by feature

Flavor
5.0 5.0
Easy to use
4.8 4.8
Value for money
4.4 4.4

Frequently bought together

$19.68 ($0.62/Ounce)
Get it as soon as Wednesday, Mar 20
Only 6 left in stock - order soon.
Sold by Sebago Distribution and ships from Amazon Fulfillment.
+
$19.85 ($0.55/Ounce)
Get it as soon as Wednesday, Mar 20
Only 13 left in stock - order soon.
Sold by Sebago Distribution and ships from Amazon Fulfillment.
+
$27.00 ($0.75/Fl Oz)
Get it as soon as Wednesday, Mar 20
In Stock
Sold by PSB Retail and ships from Amazon Fulfillment.
Total price:
To see our price, add these items to your cart.
Details
Added to Cart
Some of these items ship sooner than the others.
Choose items to buy together.

Compare with similar items

This Item
Neptune's Harvest Seaweed Fertilizer 0-0-1 (36 Ounce)
Neptune's Harvest Seaweed Fertilizer 0-0-1 (36 Ounce)
Recommendations
Neptune's Harvest Fish & Seaweed Fertilizer 2-3-1 (Gallon)
dummy
Neptune's Harvest Tomato & Veg Fertilizer 2-4-2, 1 Gallon
dummy
Neptune's Harvest Natural Tomato & Vegetable Organic, OMRI Plant Food 18 oz Concentrate
dummy
Organic Sea-K for Plants Seaweed and Kelp Fertilizer Supplement Concentrated Extract Powder Nutrient
dummy
Neptune's Harvest Tomato & Veg Fertilizer 2-4-2, 36 oz
Details
Added to Cart
Details
Added to Cart
Details
Added to Cart
Details
Added to Cart
Details
Added to Cart
Details
Added to Cart
Price$19.68$50.35$53.00$21.00$9.99-21% $27.00
List:$33.97
Delivery
Get it as soon as Wednesday, Mar 20
Get it as soon as Wednesday, Mar 20
Get it as soon as Wednesday, Mar 20
Get it as soon as Wednesday, Mar 20
Get it as soon as Wednesday, Mar 20
Get it as soon as Wednesday, Mar 20
Customer Ratings
Easy to use
4.8
4.6
4.8
4.7
4.8
Value for money
4.4
4.4
4.5
4.3
4.5
Scent
3.3
3.8
3.8
3.8
Flavor
5.0
4.5
4.5
Sold By
Sebago Distribution
Sebago Distribution
Epic Proportions
Amazon.com
Greenleaf Nutrients
PSB Retail
weight
2 pounds
4 pounds
8.8 pounds
1.13 pounds
200 grams
2 pounds
form
Liquid
Powder
Liquid
Liquid
Powder
Capsules
coverage
Medium
Medium
Full
Full
Medium
Medium
liquid volume
36 fluid ounces
3784 milliliters
1 gallons
18 fluid ounces
36 fluid ounces
specific uses
Plant Food
Plant Growth
Soil Conditioning
Organic,Plant Food
Hydroponics, Soil, Plant Growth, Root Feeding and Foliar
target species
Fish
Fish
Fish
Fish
Fish

Product Description

Neptune's Harvest Fertilizer is perfect for everything you grow! Our fish fertilizers are made from a variety of fresh caught North Atlantic fish which allows us to offer the best natural and organic products on the market!

fertilizer plant food natural organic fish seaweed safe tomato vegetable fruit lawn plant fertilizer plant food natural organic fish seaweed safe tomato vegetable fruit lawn plant fertilizer plant food natural organic fish seaweed safe tomato vegetable fruit lawn plant fertilizer plant food natural organic fish seaweed safe tomato vegetable fruit lawn rose fertilizer flower food natural organic fish seaweed safe tomato vegetable fruit lawn rose
Neptune's Harvest Fish Fertilizer Neptune's Harvest Fish & Seaweed Blend Fertilizer Neptune's Harvest Seaweed Plant Food Neptune's Harvest Tomato & Veg Formula Neptune's Harvest Rose & Flowering Formula
Customer Reviews
4.7 out of 5 stars
4,301
4.7 out of 5 stars
981
4.8 out of 5 stars
2,258
4.7 out of 5 stars
777
Dilution Rate 1:128 (1 oz per gal) 1:128 (1 oz per gal) 1:128 (1 oz per gal) 1:128 (1 oz per gal) 1:128 (1 oz per gal)
Outdoor Use Makes 32 Gallons Makes 32 Gallons Makes 32 Gallons Makes 32 Gallons Makes 32 Gallons
House Plants Makes 64 Gallons Makes 64 Gallons Makes 64 Gallons Makes 64 Gallons Makes 64 Gallons
Coverage ~ 2000 sq ft ~ 2000 sq ft ~ 2000 sq ft ~ 2000 sq ft ~ 2000 sq ft
Application Every 1-2 weeks Every 1-2 weeks Every 1-2 weeks Every 1-2 weeks. On Tomatoes & Vegetables use during the vegging stage of the plant Every 1-2 weeks. On Roses & Flowers use once buds begin to appear, when flowering begins
Benefits Perfect for everything you grow! Feed vegetables, flowers, trees, shrubs, lawn and more! Perfect for everything you grow! Feed vegetables, flowers, trees, shrubs, lawn and more! Made from Ascophyllum Nodosum that grows along the cold North Atlantic Ocean Floor Provides necessary nutrients to keep your plants vigorous with strong root zones and lush foliage, increasing its tolerance to various diseases, temperature and drought Uniquely formulated for flowering plants to increase vigor during flowering and to increase the volume and density of buds that produce healthy, vibrant flowers
N-P-K 2-4-1 2-3-1 0-0-1 2-4-2 2-6-4
Intended Use All Purpose. Vegetables, Flowers, Fruit, Trees, Lawns, and Containers. Indoor/Outdoor All Purpose. Vegetables, Flowers, Fruit, Trees, Lawns, and Containers. Indoor/Outdoor All Purpose. Vegetables, Flowers, Fruit, Trees, Lawns, and Containers. Indoor/Outdoor For best results: Tomato & Veg Formula should be used in combination with Rose & Flowering Formula For best results: Rose & Flowering Formula should be used in combination with Tomato & Veg Formula
Sprayer Friendly
OMRI Listed - -

Looking for specific info?

Product information

Warranty & Support

Product Warranty: For warranty information about this product, please click here

Feedback

Neptune's Harvest Seaweed Fertilizer 0-0-1 (36 Ounce)


Found a lower price? Let us know. Although we can't match every price reported, we'll use your feedback to ensure that our prices remain competitive.

Where did you see a lower price?

URL:
Price: ($)
Shipping cost: ($)
Date of the price:
/
/

Store name:
City:
State:
Price: ($)
Date of the price:
/
/


Please sign in to provide feedback.

Important information

Safety Information

Keep out of reach of children. Do not take internally.

Directions

Shake well before using. Prepare for one application only. Do not store diluted fertilizer. (House Plants): Use 1 tablespoon per gallon of water. Feed every 2-3 weeks. Do not over water. (Outdoor Plants): Use 1/8 Cup (1 fl. Oz.- 1:128) per gallon of water. Feed vegetables, flowers, trees and shrubs every 2-3 weeks. Apply until soil is saturated or as a foliar feed until leaves are wet, top & bottom. It is best to foliar feed early or late in the day. (Lawns): Use 1 gallon concentra

To report an issue with this product or seller, click here.

Customer reviews

4.7 out of 5 stars
4.7 out of 5
981 global ratings

Customers say

Customers like the quality, growth, appearance and color of the fertilizer. They mention that it works well, perked up a few plants quickly, helped keep plants producing even during hot summers and that the color is beautiful. They are also satisfied with ease of use, and natural. That said, opinions are mixed on smell and value.

AI-generated from the text of customer reviews

76 customers mention76 positive0 negative

Customers are satisfied with the quality of the fertilizer. They say it works well, is absolutely miraculous, and helps their aerophytes thrive. They also find it useful in transplanting new plants and giving them a good boost. Overall, customers are happy with their purchase and recommend it to others.

"...I have found it very useful in transplanting new plants (or for that matter, old plants!) into new locations, and as a general "tonic" for plants...." Read more

"...The fish fertilizer is great as well, but this one is the best bang for your buck in my opinion." Read more

"...watering my seedlings with this stuff and I feel like it helps give them a good boost!" Read more

"...a time when this product causes any issues at all, and the plants seem to love it...." Read more

24 customers mention24 positive0 negative

Customers are satisfied with the growth of their plants after using the fertilizer. They mention that it perked up a few plants quickly, and helped keep them producing even during hot summers. The product is gentle and prevents any early issues, giving the plants a great start. Some customers say the product is a little pricey, but their plants are doing great.

"...This helps prevent any early issues and gives the plants a great start, and it's so gentle you dont have to worey about overdoing it and causing..." Read more

"My plants responded in a matter of days. New growth and beautiful green." Read more

"...Most especially, my Christmas cacti...they all have amazing new growth since using this. All of my plants look healthier and shinier...." Read more

"...It’s growing at a much faster pace and seems so healthy and rich. I would recommend this for all types of plants, even if they seem healthy...." Read more

16 customers mention16 positive0 negative

Customers are satisfied with the appearance of the fertilizer. They say that it looks so healthy and rich. The quality really improves the overall health of the plants. The blades look stronger and healthier, and the plants are the healthiest they have ever been. The bloom stems look solid, not weak, and it lasted them almost an entire year.

"...seaweed extracts are beneficial to plants, in terms of increasing health and hardiness...." Read more

"...prevent any early issues and gives the plants a great start, and it's so gentle you dont have to worey about overdoing it and causing issues with..." Read more

"Good quality really improve overall health of plants" Read more

"...Keeps them all healthy and growing, smells a bit like low tide when you repot but it's not unpleasant...." Read more

12 customers mention12 positive0 negative

Customers like the color of the fertilizer. They mention that it has a beautiful green hue and their plants look more happy and vibrant. They also mention that their plants are healthier and shinier after using the product. They recommend using 1 ml per gallon once a week to keep their plants very green and healthy.

"My plants responded in a matter of days. New growth and beautiful green." Read more

"...All of my plants look healthier and shinier. This bottle will last forever!" Read more

"...It’s growing at a much faster pace and seems so healthy and rich. I would recommend this for all types of plants, even if they seem healthy...." Read more

"...the solution have a deeper green hue (forest green) and looked more happy and vibrant, really reached for the sun...." Read more

8 customers mention8 positive0 negative

Customers find the fertilizer easy to use. They say it's beyond easy to operate, even for beginners.

"...Very convenient to use and organics the way to go for the the biggest, loveliest plant there are...." Read more

"Beyond easy to use even for beginners! Also, has great value for money with is a huge plus...." Read more

"...I also use it for when my plants get injured... like a bandaid. Easy to use and a great product...." Read more

"...If you answered yes, then buy this dumb crap! Its very simple really. You follow the directions completely...." Read more

7 customers mention7 positive0 negative

Customers are satisfied with the natural fertilizer. They mention that it works great, is safe, and is approved for use in organic production. Customers are also happy that there are no animal products in the product.

"...Also, for me, it is a big plus that this supplement is approved for use in organic production...." Read more

"...This product is an exception to that rule because it is natural and so gentle...." Read more

"...I love that vegetables feed vegetables and there’s no animal products in it. It’s also natural and safe for the children I work with to be around...." Read more

"...I ordered this product because it is organic. The plants perked up and greened up quickly. I would absolutely buy this product again." Read more

15 customers mention8 positive7 negative

Customers have mixed opinions about the smell of the fertilizer. Some mention it does not smell horrible at all, while others say that it smells to high heaven.

"...Comes out tea colored and has some seaweed smell when you mix it, but doesn’t make your plants smell like seaweed." Read more

"...Keeps them all healthy and growing, smells a bit like low tide when you repot but it's not unpleasant...." Read more

"I like this product. Works well here and does not smell fishy.." Read more

"...It says it's from the North Atlantic, but it doesn't smell as fresh as the stuff I've used for years...." Read more

12 customers mention8 positive4 negative

Customers are mixed about the value of the fertilizer. Some mention it's a great price and you get a lot of product for the price, while others say that it' s overpriced.

"...It's definitely one of the cheaper amendments available (in liquid form anyways) Neptunes harvest is one of the..." Read more

"...This seaweed plant food is certainly not the cheapest plant supplement you can buy, but I think you get what you pay for, in this case...." Read more

"...You get a lot of product for the price. I’m excited to use this product more and see how my plants react." Read more

"...The price was also the lowest I found at my local garden centers...." Read more

Really works but lately price increases make this expensive
4 Stars
Really works but lately price increases make this expensive
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 kelp fertilizer, it is so mild I almost wouldn't consider it a fertilizer, it's more of a multivitamin for your plants/soil. I use it either every other watering or every third watering for seedlings. This helps prevent any early issues and gives the plants a great start, and it's so gentle you dont have to worey about overdoing it and causing issues with young seedlings. I cant think of another fertilizer that you can apply to brand new sprouts and they'll just take off and love it! 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 so gentle.For more established plants I would use this product in conjunction with higher strength organic fertilizers to help give the plants micronutrients, since most NPK fertilizers are often have little or no micronutrients. 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 also use this product when I first hydrate new potting soil mix to help the beneficial microbes come alive and get established.I haven't discovered a time when this product causes any issues at all, and the plants seem to love it. To me this product is more for preventing plant issues than it is a fertilizer. Keep in mind that if plants have access to all the nutrients, micronutrients, minerals that plants actually defend themselves from pests and stressors. If your plant is truly healthy, insect pests usually leave your plant alone and search for a weaker plant to take advantage of. Imagine being an aphid and trying to suck on the plant. First thing that deters you is the plant is a tougher to bite into than usual. Hmm, not the end of the world but also not ideal. Ugh this plant tastes horrible because the plant produced it's own defensive chemicals and hormones. You can take a bite or two but now you don't feel so well, again because the plant has made some defensive toxins and stored them in the cells for defense. These toxins do not impact the plant but can mess up the digestive tracts of pests. Put yourself in the insects place. Would you want to stay on this healthy plant and continue to essentially be poisoned and everything you try to do is more difficult? No, your instinct is to move along and find a much easier target...another plant that isn't doing as well and has a compromised immune system and defenses. In fact, insects have evolved to literally smell the distress signals of plants and they seek out weak and easy meals. Your neighbor's fruit and vegetable garden is perfect because they use Miracle-Gro or some other synthetic fertilizer that doesn't supply the plants full needs, just the ones necessary to grow large and have a lot of energy. To insects these plants are essentially fast food because there's tons of calories and nothing stopping them from eating. Now because your neighbor has all these pest problems, they will be sure to apply synthetic pesticides because these products are right next to the Miracle-Gro! Now your neighbor has created a viscous cycle where the very products they apply are damaging their ecosystem more than helping it, and they will always be constantly applying synthetic fertilizers, herbicides, fungicides etc because otherwise their gardens or farms would collapse without the aid of these tools. This is perfect for the fertilizer companies (which also own the companies that make pesticide, herbicide, etc). They have a repeat customer for life! Nothing is better for a corporation than steady, reliable income.Haha I really went on a tangent there, but just know that this product is a great tool to supply the natural plant and soil ecosystem to keep things healthy!
Thank you for your feedback
Sorry, there was an error
Sorry we couldn't load the review

Top reviews from the United States

Reviewed in the United States on August 16, 2021
Size: 36 OunceVerified Purchase
6 people found this helpful
Report
Reviewed in the United States on July 8, 2023
Size: 36 OunceVerified Purchase
2 people found this helpful
Report
Reviewed in the United States on October 13, 2023
Size: 128 ozVerified Purchase
One person found this helpful
Report
Reviewed in the United States on February 7, 2022
Size: 36 OunceVerified Purchase
Customer image
4.0 out of 5 stars Really works but lately price increases make this expensive
Reviewed in the United States on February 7, 2022
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 kelp fertilizer, it is so mild I almost wouldn't consider it a fertilizer, it's more of a multivitamin for your plants/soil. I use it either every other watering or every third watering for seedlings. This helps prevent any early issues and gives the plants a great start, and it's so gentle you dont have to worey about overdoing it and causing issues with young seedlings. I cant think of another fertilizer that you can apply to brand new sprouts and they'll just take off and love it! 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 so gentle.

For more established plants I would use this product in conjunction with higher strength organic fertilizers to help give the plants micronutrients, since most NPK fertilizers are often have little or no micronutrients. 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 also use this product when I first hydrate new potting soil mix to help the beneficial microbes come alive and get established.

I haven't discovered a time when this product causes any issues at all, and the plants seem to love it. To me this product is more for preventing plant issues than it is a fertilizer. Keep in mind that if plants have access to all the nutrients, micronutrients, minerals that plants actually defend themselves from pests and stressors. If your plant is truly healthy, insect pests usually leave your plant alone and search for a weaker plant to take advantage of. Imagine being an aphid and trying to suck on the plant. First thing that deters you is the plant is a tougher to bite into than usual. Hmm, not the end of the world but also not ideal. Ugh this plant tastes horrible because the plant produced it's own defensive chemicals and hormones. You can take a bite or two but now you don't feel so well, again because the plant has made some defensive toxins and stored them in the cells for defense. These toxins do not impact the plant but can mess up the digestive tracts of pests. Put yourself in the insects place. Would you want to stay on this healthy plant and continue to essentially be poisoned and everything you try to do is more difficult? No, your instinct is to move along and find a much easier target...another plant that isn't doing as well and has a compromised immune system and defenses. In fact, insects have evolved to literally smell the distress signals of plants and they seek out weak and easy meals. Your neighbor's fruit and vegetable garden is perfect because they use Miracle-Gro or some other synthetic fertilizer that doesn't supply the plants full needs, just the ones necessary to grow large and have a lot of energy. To insects these plants are essentially fast food because there's tons of calories and nothing stopping them from eating. Now because your neighbor has all these pest problems, they will be sure to apply synthetic pesticides because these products are right next to the Miracle-Gro! Now your neighbor has created a viscous cycle where the very products they apply are damaging their ecosystem more than helping it, and they will always be constantly applying synthetic fertilizers, herbicides, fungicides etc because otherwise their gardens or farms would collapse without the aid of these tools. This is perfect for the fertilizer companies (which also own the companies that make pesticide, herbicide, etc). They have a repeat customer for life! Nothing is better for a corporation than steady, reliable income.

Haha I really went on a tangent there, but just know that this product is a great tool to supply the natural plant and soil ecosystem to keep things healthy!
Images in this review
Customer image Customer image
Customer imageCustomer image
25 people found this helpful
Report
Reviewed in the United States on October 31, 2023
Size: 18 OunceVerified Purchase
One person found this helpful
Report
Reviewed in the United States on April 12, 2023
Size: 36 OunceVerified Purchase
2 people found this helpful
Report
Reviewed in the United States on December 11, 2023
Size: 36 OunceVerified Purchase
Reviewed in the United States on June 28, 2022
Size: 128 ozVerified Purchase
2 people found this helpful
Report

Top reviews from other countries

Translate all reviews to English
Johane Brisebois
5.0 out of 5 stars C'est très facile à l'emploi. Merci
Reviewed in Canada on May 5, 2022
Size: 36 OunceVerified Purchase
Mene
5.0 out of 5 stars I give 5 stars This product is amazing 🤩
Reviewed in Canada on March 18, 2021
Size: 18 OunceVerified Purchase
One person found this helpful
Report
Amazon Customer
5.0 out of 5 stars Awesome fertilizer
Reviewed in Canada on August 18, 2021
Size: 18 OunceVerified Purchase
og
4.0 out of 5 stars neptunes harvest
Reviewed in Canada on May 16, 2014
Size: 36 OunceVerified Purchase
One person found this helpful
Report
Amazon Customer
5.0 out of 5 stars Still looking forward to try it, my sister has used it and is having wonderful results
Reviewed in Canada on April 18, 2020
Size: 18 OunceVerified Purchase