Plant Health Seaweed Tonic Concentrate - 6 Pack

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item: 9954
5 reviews
$ 83.40 SAVE 30%

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Product Info

Contains 6 x Plant Health Seaweed Concentrate = a total of 7.5 litres!

Hoselink’s Plant Health Seaweed Tonic Concentrate is made from a combination of kelp seaweed and soluble potassium humate which helps plants to grow more vigorously, enriches the soil and stimulates flowering and fruiting.

Packed with minerals and nutrients, seaweed is high in complex carbohydrates essential for assisting with healthy plant growth and defending plants from soil-borne diseases. Though rich with minerals, the Seaweed Tonic has small quantities of such nutrients, making this formula safe and gentle enough for use on delicate plants and seedlings, as well as for regular plant health maintenance.

The fast-acting formula works effectively whether applied directly to the soil or to the foliage, as plants can absorb food directly through their leaves. Seaweed Tonic is suitable for use on both indoor and outdoor plants.

Contains liquid composts that promote good soil structure – looking after your plants above and below ground! Plus, it is safe to use on all plants including natives, seedlings, flowering and fruiting plants.

Directions for Use

Watering Can

Refer to dilution rates table below. Figures based on pre-mixing in a 9litre watering can.

  1. Fill watering can with water
  2. Mix required amount of Plant Health Tonic
  3. Apply evenly over selected application

Hoselink Fertiliser Spray Mixer:

Dilution rates; 450ml of Plant Health covers 202m². *based on foliar application

  1. Shake well before use
  2. Flow reducer required - unscrew the bottle and remove the siphon tube, then unscrew brass pin from above selector dial and push into the top of the siphon tube. Reassemble.
  3. Pour concentrate into Hoselink’s Fertiliser Spray Mixer.
  4. Select dial (refer to table below) and walk slowly using a sweeping action to apply evenly to selected application.


Plant/ Application Type

Rate per 9Lt watering can

Hoselink Spray Mixer Setting

Application Frequency



1 with flow reducer

Every 1-2 weeks

Foliar Application


1 with flow reducer

Every 1-2 weeks

New Plantings


1 with flow reducer

At planting and in 2 weeks



1 with flow reducer

Every week



1 with flow reducer

Every week

Established Plants


1 with flow reducer

Every 1-2 weeks



5 with flow reducer

Every 2 weeks



5 with flow reducer

Every 2 weeks
(during growing period)


Expert Tip: For the ultimate soil boost, use alongside the Hoselink Super Grow Garden Fertiliser, applying formulas 10-14 days apart.

Proudly made in Australia.

When should I use Seaweed Tonic?

We recommend using our Seaweed Tonic 2-3 times per month for best results. Unlike with other fertilisers, Seaweed Tonic can be safely sprayed on your garden throughout the year.

For more on how to use Seaweed Tonic, read our guide on the Backyard Living blog here.



See more Fertilisers.

Read More

Product Specifications

Typical Analysis

Contains 0.5% Potassium Hydroxide
No other reportable quantities

Safety Data Sheet

What's Included

  • 6 x 1.25ltr Plant Health *Seaweed Tonic* Concentrate


Customer Reviews
4.6 Based on 5 Reviews
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Terry L.
Australia Australia
I recommend this product
Plant Health Seafood Tonic Concentrate Feedback

All good. Product arrived quickly and we are currently using the product. I use this product with other fertilizers on our garden and veggie garden

Ian d.
Australia Australia
I recommend this product
A very good product and easy to use

Hoselink staff very helpful people and easy to talk too

Amanda H.
Australia Australia
I recommend this product
Plant Health Seaweed Tonic bulk buy

Great, vegetable seedlings are growing well & are very healthy, just need some rain to boost things along.

John G.
Australia Australia
I recommend this product
Tonic for the tonic.

Have been using it for a couple of weeks, plants looking excellent. Now spring has arrived will hope to see further results.

John G.
Australia Australia
I recommend this product
It’s a good product but would really like a bulk container

I usually buy seaweed products in bulk 10 litre containers. These have taps for easy delivery of the products. It seems silly to sell one litre containers. In my case I decanted these 6 containers into a larger container so I could use the tap. Please consider bulk products.

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