Charlie Carp vs Seasol: Which to Choose?

Both of these products are useful in keeping our plants happy and healthy, but they serve slightly different purposes in our garden.

When comparing Charlie Carp vs Seasol, it’s important to understand that while Charlie Carp is an all-purpose fertiliser, Seasol is not.

On the contrary, Seasol is regarded more as a soil conditioner and is very helpful for good root formation and improving the health of all plant cells.

Therefore, both of these products serve different purposes in our garden. They are both extremely useful in keeping our plants happy and healthy.

What is Charlie Carp?

Charlie Carp | Plant care

Charlie Carp is a fish emulsion. It’s made from European carp and contains essential nutrients such as nitrogen, phosphorus, and potassium.

Charlie Carp comes in a number of different formulations that have different NPK makeup.

These include:

It’s important to note that the All Purpose Fertiliser has been fortified with extra nitrogen whereas the Premium Organic Fertiliser is 100% composed of European carp.

Both these products are available in liquid form while the FishWorks pellets are in a slow-release granular form.

Not only is this product organic but it also helps to control a major environmental problem in our waterways. European carp are an introduced species and are regarded as the most destructive and invasive freshwater fish in the world.

Charlie Carp Reverse | Plant care

By removing this invasive species from our waterways, the manufacturers of Charlie Carp are helping our native fish to survive and also providing us with an organic fertiliser to help our plants grow strong and healthy.

What is Seasol?

seasol bottle | Plant care

Seasol is a liquid seaweed concentrate that is designed to improve the health of our plants as well as the soil.

By applying this product as a foliar ‘feed’, it helps to promote vigorous growth, strong roots, and increased flowering and fruiting.

It’s a great tonic for all types of plants, especially at times when they are experiencing stress during periods of drought or extreme cold. It’s also commonly used to reduce transplant shock.

I generally use Seasol on my vegetables and flowering plants during the warmer months, just to give them a boost.

More often than not, I just mix it up in a watering can with water and then use it by attaching a rose to the spout and just watering it all over the foliage of my plants.

It’s important to note that the regular Seasol is not a fertiliser and does not contain essential nutrients such as nitrogen, phosphorus, and potassium.

Therefore, you still need to supply your plants with these nutrients in addition to using Seasol.

However, the company does produce a supplementary product called Seasol PowerFeed that has been fortified with extra nutrients and can be used as an all-purpose fertiliser. The NPK makeup of this product is 12:1.4:7.

View Seasol PowerFeed at eBay.

Charlie Carp vs Seasol: Key Differences

The key difference between Charlie Carp and Seasol is that the former is an organic fertiliser while the basic form of Seasol is not.

However, Seasol PowerFeed contains not only seaweed extract but also fish emulsion. Therefore, this product is both a soil conditioner and a liquid fertiliser.

Here’s a chart that shows the key differences between these products.

Product NameMain IngredientsNPK Formulation
Charlie Carp All PurposeHydrolysed whole fish and added nutrients10 : 1 : 6
Charlie Carp Premium OrganicHydrolised whole fish 2 : 0.4 : 0.75
Charlie Carp All Purpose PelletsHydrolysed whole fish and added nutrients6 : 1 : 3
Seasol Seaweed SolutionSeaweed0.1 : 0.01 : 1.5
Seasol Liquid CompostSeaweed, fish, liquid compost  and added nutrients2.4 : 0.1 : 2.5
Seasol PowerFeed (Green)Seaweed, fish and natural soil conditioners12 : 1.4 : 7
Seasol PowerFeed (Red)Seaweed, fish and soil improver14 : 1.4 : 8
Seasol PowerFeed (Pink)Seaweed, fish and liquid compost7 : 2 : 8

A brief guide to N:P:K ratios

N – The first number represents the amount of nitrogen in the product. Nitrogen promotes vigorous leaf growth and deep greening of plants, but too much can cause burning of foliage.

P – The second number represents the amount of phosphorus in the product. Phosphorus promotes root growth and flowering.

K – The third number represents the amount of potassium in the product. Potassium helps plants withstand stress and promotes overall hardiness and disease resistance.

Which Should You Choose?

As both products are beneficial to healthy plant growth, it can be difficult to choose one over the other because they serve different purposes in the garden.

Ideally, you could use a combination of Charlie Carp All Purpose or Organic and the basic Seasol seaweed solution.

This would provide your plants with the necessary nutrients as well as the health and growth benefits supplied by the seaweed solution.

On the other hand, if you choose the Seasol PowerFeed (Green), this will provide both the necessary nutrients for healthy plant growth and the power of seaweed as a soil conditioner.

The Seasol PowerFeed (Red) is better for fruiting plants because it contains a higher level of potassium while the (Pink) version is great for flowering plants such as roses.

In my own garden, I generally use the basic Seasol seaweed solution as a plant tonic and then also apply an all-purpose fertiliser to provide additional nutrients.

I also make my own compost which I add to my vegetable growing beds.

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Does Seasol have nitrogen?

No, the basic version of Seasol does not contain nitrogen. Seasol PowerFeed, however, contains added nitrogen and can therefore be used as an all-purpose fertiliser

Is Charlie Carp good for tomatoes?

Yes, Charlie Carp has all the nutrients that tomatoes need.

How often should you use Charlie Carp?

It depends on what you’re growing. In general, for vegetables and herbs, you can apply it every two to four weeks.

Photo of author

Annette Hird

Annette Hird is a gardening expert with many years of experience in a range of gardening related positions. She has an Associate Diploma of Applied Science in Horticulture and has worked in a variety of production nurseries, primarily as a propagator. She has also been responsible for a large homestead garden that included lawn care, fruit trees, roses and many other ornamental plants. More recently, Annette has concentrated on improving the garden landscape of the homes that she has lived in and focused a lot of energy on growing edible plants as well. She now enjoys sharing her experience and knowledge with others by writing articles about all facets of gardening and growing plants.


1 thought on “Charlie Carp vs Seasol: Which to Choose?”

  1. Oh my goodness, I am so relieved, happy, excited to find your informative gardening site. I have struggled to make sense of some of the products out there. Your site has been a huge game changer for me. I cannot thank you enough.
    Happy Gardening.


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