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Seasol Commercial Strength 20 Litre

DOUBLE STRENGTH: With twice the concentration of regular Seasol


Seasol commercial strength is a liquid seaweed extract which is 100% organic and provides a synergistic range of natural compounds and trace elements derived from a blend of the finest brown kelps from around the world.

Seasol Commercial Strength Seaweed Concentrate 20 Litre. Double the Strength of Regular Seasol!

Seasol is a 100% organic seaweed liquid extract that provides a synergistic range of natural compounds and trace elements derived from a blend of the finest brown kelps from around the world. King Island Bull Kelp, Durvillaea potatorum from the waters of north west Tasmania and Knotted Kelp Ascophyllum nodosum from the North Atlantic Ocean. These are not harvested from living stands, but sustainably sourced from storm-cast material collected from remote Southern Ocean shores of Tasmania and parts of the North Atlantic. Bull Kelp is the major species used to make Seasol as it grows in the pristine oceans around King Island and the west coast of Tasmania – free from any pollution or contamination; it provides the strongest stimulation for plant growth.

The processing plant used to extract the liquid concentrate is the only one of its type in the world and the manufacturing process is also unique and maximises the extraction of plant essential compounds.

Features and Benefits:

  • Seasol aids plant development, stimulating plant and root growth and bud set.
  • Seasol improves fruit set and quality. Used as an organic health tonic it significantly improves the benefits of a balanced nutritional program for optimising fruit set and delivering more consistent yields, year after year.
  • Seasol enhances the sugar content in some fruits – treated plants show higher brix readings.
  • Seasol improves plant establishment. It stimulates root growth needed for rapid establishment of new plantings and reduces the effects of transplant shock.
  • Seasol enhances cell turgidity resulting in crops that can better withstand adverse environmental conditions such as heat, drought and frost.
  • Seasol increases natural resistance to insect and fungal attack.
  • Seasol is a natural food source for soil flora and fauna.
  • Seasol contains virtually no nitrogen or phosphorus, so will not interfere with other nutritional inputs and can be used all year round.
  • Complements any balanced fertiliser program.
  • Seasol can be used anytime during the growing season as a general plant conditioner and tonic to aid in optimising plant health, flowering and fruit production.

How it works:

Throughout history Seaweed and its effect on plant growth has been well documented. Seasol concentrate is a complete plant health treatment that contains a synergistic range of natural compounds, trace elements, alginates and other bio-active compounds that help to promote healthy roots, encourage beneficial soil micro-organisms, stimulate flowering and fruiting and help plants to cope with stresses like heat, drought and frost or pest and disease attack.

How to use it:

For use as either a soil application or foliar spray. Seasol is especially useful at important stages in plant development, such as germination, transplant, flowering, fruit set or at any time when the plant is growing rapidly.

Usage rates: This Commercial Grade Seasol is double the strength of regular Seasol. See the commercial strength application rates below.

Ferns 10ml Every 2 - 4 weeks.
Foliar Application & Indoors 10ml Every 2 - 4 weeks.
Transplanting & Planting 15ml At planting and again 1 week later.
Vegies, Herbs & Annuals 15ml Every 2 weeks.
Established Garden 15ml Every 2 - 4 weeks.
New Lawns 25ml Every 7 - 10 days while establishing.
Lawns 50ml Every 2 - 4 weeks to maintain.
Large/Stressed Trees 50ml Apply to soil around dripline(canopy edge) of tree. 


Keep out of Reach of Children. NOT TO BE TAKEN. May irritate skin and eyes. Wash hands after use. As with all plant treatments, wash edible plants before eating. Use within 24 hours of mixing.

Disclaimer: Please do not consider any information on this page or website as expert advice. Always seek expert advice before using any of our products or caring for any pets or plants. Always read and follow all instructions on the products label ahead of any other source of information, even ahead of information on this page that may errors.

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