11 Best Liquid Kelp Fertilizers

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Seaweed has been used to help plants for thousands of years before the advent of commercial fertilizer production. 

As we know, they provide numerous benefits to plants that are far better than the commercial fertilizer that we know. They help you promote more vigorous and healthier plants. 

In this article, we will discuss some of the best liquid kelp fertilizers out there and why they’re the best. Stay tuned 

What is Liquid Kelp Fertilizer?

Liquid kelp fertilizer is also known as liquid seaweed fertilizer; it is a fertilizer obtained and produced from natural seaweed sources.

The process is not very tedious, seaweed is collected, and some salt water is washed away. The seaweed is allowed to decay in water until the materials in the plants are broken down into a liquid.

The reason for this decomposition is to allow it to ferment, to release all its chemicals. Without this decomposition, it cannot be used for fertilizer. 

Kelp, a large brown seaweed, has been used for fertilizer for many years and in crop production because of their positive effect on plant growth. By positive impact, we mean it increases plant growth, healthiness, and fruit production. 

As agriculture increases and continues to thrive in this new age, the demand for a better cost-effective fertilizer like liquid kelp fertilizer is increasing. These naturally made fertilizers from seaweeds are known as biofertilizers or biostimulants, offering better use than the conventional fertilizer we use. 

We will dive into some of the best liquid kelp fertilizers that are good for your plants and increase plant yield, productivity, and overall fruit production.

See Also: Liquid Kelp Fertilizer For Lawns

Best Liquid Kelp Fertilizers

There are so many best liquid kelp fertilizers out there, but we will list out the best for you.

1. Organic Liquid Seaweed and Kelp Fertilizer Supplement 

This is one of the best liquid kelp fertilizers out there, the techniques used in producing this kelp fertilizer are the cleanest, and pure natural seaweed is used, which makes it far better than the conventional fertilizer.

Some of its uses are:

Easy to use for all plants: This kelp fertilizer can be used for Kendall plants. There’s no danger of overuse, so you don’t need to worry about putting in more than necessary. Plants love kelp fertilizers, and pure kelp supports root and stem health in every stage of plant growth. 

For plants and lawns: You can easily use this type of fertilizer for your plants or even flowers, vegetable garden, and lawn for healthy growth and productivity. 

Key Features

  • It is ecologically friendly and does not cause any problems to the ecosystem
  • It preserves the natural enzymes in the ground and plants
  • It works on any plants and lawns

2. Neptune’s Crop Organic Hydrolyzed Fish and Seaweed Fertilizer 

This type of fertilizer is not unique but water soluble. It is one of the best types of kelp liquid fertilizer, which makes it one of the best options that are excellent for plants. 

Vegetables are heavy feeders which require more nitrogen than other typical plants. This fertilizer is incorporated with all the requirements for plant growth and development, most especially the overall fruit production of the plant. 

Key Features

  • Effective combination of fish and seaweed, which makes for profuse flowering and high yield
  • This type of fertilizer performed well in lawns and with seed germination, which makes it one of the most widely used types of fertilizer

3. Super Seaweed Humic Acid Blend 

This type of fertilizer is unique. It is not only gotten from seaweed but is also mixed with soil organic materials, which can help to increase nutrients and overall plant growth. This type of fertilizer also allows plants to absorb nutrients more efficiently. 

Key Features

  • This type of fertilizer is strictly organic, and as such, it is environmentally friendly, doesn’t cause havoc to the ecosystem, and is easy to dispose
  • It protects natural enzymes both in plants and in your gardens
  • This type of fertilizer works for every kind of plants 

4. Microlife Super Seaweed Fertilizer 

This is a unique type of kelp fertilizer. It provides excellent plant color, and most interesting is that it helps to make the plants more resistant to stress. In addition to this superb quality, it is an organic fertilizer, and it is very safe for all types of crops. 

Furthermore, this type of plant can help to improve plant nutrients and the nutrients in the soil and, at the same time, strengthen the plant to make it resilient to stress. This makes this type of fertilizer different and unique. 

Key Features

  • One of the foremost importance of this fertilizer is that it is organic and very eco friendly
  • This type of fertilizer works faster than most other liquid kelp fertilizer
  • This type of fertilizer is multi-purpose and effective for all kinds of plants

5. Grow More Seaweed Extract 

This kelp fertilizer is one of the best. It offers a seaweed extract fertilizer instead of just fermented kelp. 

The benefits of this fertilizer are numerous and found in all the multifaceted components of seaweed extracted and fortified with essential minerals that help plants grow, survive, and produce effectively. 

At the same time, this promotes strong root formation and makes the plant resistant to heat waves and damage due to frost.

This kelp fertilizer is versatile enough for use on plants like vegetables, trees, shrubs, and even flowers. This makes it one of the best fertilizers out there. 

6. Sea Ruby(liquid) Green Seaweed Extract

This is one of the best types of liquid kelp fertilizer. It provides natural NPK and is 100% pure. It is widely used among farmers.

It reduces the living and not living stress and eliminates reactive oxygen species produced during different stress conditions. This type of plant hormone helps phytohormones which are one of the best hormones in the plant, which increase growth and development.

This hormone is unique and effective in helping in plant defense mechanism. It improves plant immunity and the ability to resist attack by viruses, pathogens, and fungal attack. The minerals in this fertilizer help to increase plant microbial population hence improve it’s the structure of the soil

This fertilizer helps to improve the root and shoot growth which increases the overall plant performance. Most fertilizers mainly focus on the growth of plan, but in addition to that, this fertilizer helps to increase nutrients intake in plants.

Chlorophyll synthesis is essential, and this fertilizer helps plant chlorophyll intake and improves crop yield and quality. The plant requires fertilizer that helps in protein metabolism, and this fertilizer is the right choice.

It increases the ability of plants to tolerate salinity and herbicide stress.

See Also: Types of Liquid Fertilizer

7. Simple Grow Solution Seaweed Fertilizer With Humic Acid

This liquid kelp fertilizer shows that powdered and liquid seaweed feed can be fortified with nutrients. 

This type of seaweed fertilizer combines all the benefits of water-soluble seaweed with humic acid, which is very beneficial to plant and organic carbon. 

This plant fertilizer helps to increase crop production and the vibrancy of color in flowers, borders, and lawns. 

8. Down To Earth Organic Kelp Meal

This is a unique type of fertilizer, an ideal nutritional supplement for all those vegetables, herbs, and flowers, this type of fertilizer is effective for perennials too. It helps to boost root development, helps prevent transparent shock in plants, and increases growth and development. Its ability to reduce stress caused by changes in temperature is impressive. 

This fertilizer is harvested from the North Atlantic or is dried by hand before it is crushed into powder form. The exciting part is that it is entirely organic. This fertilizer can be used for different plants around your garden, which includes vegetables, herbs, flower beds, and other perennials.

This fertilizer is helpful in every stage of the plant growing cycle by helping them develop healthy roots and stems and protect them from harsh element conditions. The seaweed used in the production of this fertilizer is finely formed and very rich in nitrogen and potassium. 

When you use this type of fertilizer, you don’t have to worry about anything. You’d be rest assured that your plant will grow effectively, mature, and produce fruit effectively. 

9. Sea Magic Dry Soluble Seaweed Extract

This is a unique type of kelp liquid fertilizer. It is known as the easiest to store and prepare a kind of kelp fertilizer. 

You can purchase this fertilizer in the middle of winter and store it in a cool, dry place, unlike whenever you are ready to use it. All you have to do is to mix 4 liters of water and have it concentrated for the season. 

People love this type of fertilizer so much. It doesn’t smell and is one of the cheapest types of fertilizer out there. It works so effectively that people say it works like a charm. 

10. Shashi N Gautam Seaweed Green Fertilizer 

Shashi N Gautam seaweed green fertilizer is one of the most essential types of kelp fertilizers out there. It is an excellent blend of seaweed extract granules for plants. It is the best and most used organic micronutrient fertilizer for indoor and outdoor uses. 

Seaweed green manure is very cost-effective. is practical and suitable for all types of plants. When using this fertilizer, there’s no need to buy different types of fertilizer for flowers and fruits, vegetables, and ornamental plants. This type of fertilizer is safe and easy to use. It is clean and helps to maximize each plant’s flower and fruit production. 

Like most other types of effective fertilizer helps to prove the soil’s health, and it does this effectively by increasing the population of valuable microorganisms in the soil. Its regular application loses the soil, allowing for healthy root growth and development. This makes this fertilizer one of the best kelp liquid fertilizers out there and one of the best to use. 

11. Pheromones Organic Seaweed Liquid Fertilizer 

This type of organic kelp fertilizer is a natural organic fertilizer made for plants. It has all the complete nutrients and minerals that plants may need. Pheromones for plants’ seaweed fertilizer contain in it a range of different micronutrients and trace elements that are very essential for plant growth and development. 

This fertilizer can easily be sprayed on plants or added to the soil. This fertilizer is explicitly designed to be used as a fertilizer for your home garden. This type of fertilizer is unique and different from most others out there. It helps in the prevention of flowering and fruit drops which helps to improve fruit yield and growth. 

It equally helps greatly in seed germination, especially in the absorption of nutrients and the growth of plants which gives rise to plants that are taller with larger fruits and vegetables. Like few other fertilizers, this unique kelp fertilizer helps synthesize chlorophyll and essential micronutrients for plant growth, fruit, and seed germination and formation.

When you use this fertilizer for your plant or crops, it helps to increase soil microorganisms which help to take up nitrogen from the air and aid in the growth of plants. It equally reduces salt content and effectively addresses soil salinization due to too much fertilization. This makes it one of the best fertilizers out there. 


We’ve come to the end of this article. We have seen the best kelp fertilizers and their effective effects on crops and plants. We are passionate about seeing you go green. Hence, we wish to see your plants flourish. 

We are confident that you are clear on this topic on the best kelp fertilizer for your plants. 

Feel free to drop your questions. We shall attend to them swiftly. And yes, do well to share this article with your friends. Go green!