Description
What are the benefits of Seasol Seaweed Concentrate?
Seasol Seaweed Concentrate (Commercial Grade) draws on plant nutrients, trace elements, alginic acid, and other beneficial bioactive compounds to promote plant and soil health across roots, soil, flowering, and fruiting. It also helps plants to cope with stresses like heat, drought, frost, pests, and disease.
What is Seasol Seaweed Concentrate made from?Â
Seasol is derived from a blend of the finest brown kelp species from around the world, including the King Island bull kelp (Durvillaea potatorum) and knotted kelp (Ascophyllum nodosum). Samples are sustainably sourced from storm-cast material from the remote shores of Tasmania and parts of the North Atlantic, rather than from living organisms. This ensures the highest possible quality and consistency in every drum.
Notably, bull kelp provides the strongest stimulation for plant growth thanks to a complete lack of pollution or contamination.
Once plant matter has been acquired, Seasol Liquid Seaweed Concentrate (Commercial Grade) is extracted in a processing plant through a unique method designed to maximise the extraction of essential compounds.
What is the analysis of Seasol Seaweed Concentrate?Â
Seasol Seaweed Concentrate (Commercial Grade) typically returns an analysis as follows:Â
- Nitrogen: 0.2% w/v
- Phosphorus: 0.02% w/v
- Potassium: 3.7% w/v
- Boron (B): 15 mg/L
- Calcium: 458 mg/L
- Cobalt: <0.5 mg/L
- Copper (Cu): <0.5 mg/L
- Iron (Fe): 115mg/L
- Magnesium (Mg): 972 mg/L
- Manganese (Mn): 2 mg/L
- Molybdenum (Mo): <0.5 mg/L
- Selenium (Se): <0.5 mg/L
- Silicon (Si): 56 mg/L
- Sodium (Na): 6820 mg/L
- Sulphur (S): 2,574 mg/L
- Zinc (Zn): 5 mg/L
- pH: 11.5-12.5 units
- Total solids: 17% w/v
- Total organic matter: 8%
- Specific gravity: 1.1
- Filtration: 150 microns
Seasol also includes a range of trace elements. For a detailed chemical makeup, please refer to the complete Seasol Seaweed Concentrate Analysis.
How to apply Seasol Seaweed Concentrate
Seasol is filtered to 150 microns, making it suitable for application with any conventional spray equipment, including a boom or irrigation equipment. For plants that are hard to wet, combine Seasol with a non-ionic wetting agent.
Best practice suggests application is avoided under extreme weather conditions (drought, heavy rainfall, etc.). Seasol should never be applied undiluted, as water acts as a carrier to ensure proper coverage. Once you have diluted the product, it must be used within 24 hours.
Seasol Commercial Grade vs regular grade: What’s the difference?Â
The key difference between Seasol Seaweed Concentrate (Commercial Grade) and its ‘regular grade’ counterpart is simply the concentration of ingredients. The commercial grade equivalent includes active ingredients at a higher concentration than traditional Seasol.
Is Seasol a fertiliser?Â
No, Seasol is not a fertiliser. It is a plant conditioner and biostimulant that contains low levels of nitrogen, phosphorus, and potassium, but not in quantities that can drive plant nutrition. Its role is to stimulate root growth, improve stress tolerance, and improve microbial activity in the soil. It should be used alongside your existing fertiliser, not as a replacement.
How is Seasol different from PowerFeed?
Seasol Seaweed Concentrate is a plant conditioner, whereas PowerFeed is a fertiliser. Seasol focuses on root stimulation, stress tolerance, and soil microbial activity, whilst PowerFeed delivers targeted plant nutrition across nitrogen, phosphorus, and potassium plus trace elements. Many growers use both products as part of an integrated plant health program.
Can I use Seasol Seaweed Concentrate through a fertigation or irrigation system?
Yes — Seasol Commercial is filtered to 150 microns and suits all conventional irrigation systems. Apply at 5 to 10L/ha through drip or micro-irrigation, overhead sprinklers, and travelling or pivot irrigators. For hand sprayers and knapsacks, use 3 to 5mL per litre of water. The product should be applied throughout the full irrigation run to achieve consistent coverage from the canopy to the root.
Can Seasol Seaweed Concentrate be used on vegetables and edible plants?
As an ACO Certification Ltd Allowed Input, Seasol Commercial is suitable for vegetables and edible crops. As with all plant treatments, ensure you wash edible produce before consuming it after application.
How often should Seasol Seaweed Concentrate be applied?
The frequency of application for Seasol Seaweed Concentrate will depend on the situation. For general plant health, apply every three to four weeks throughout the growing season. For stress management during heat or cold events, apply five to seven days before the expected stress period and again afterward. For pastures, apply in the first irrigation after each grazing event.
Can Seasol Seaweed Concentrate be mixed with fertilisers or other products?
Yes — Seasol Commercial is generally compatible with liquid fertilisers in tank mixes. However, tank-mixing with pesticides should be avoided when the target outcome is cold-stress tolerance. Field experience shows this reduces that specific benefit. As with any product combination, always confirm compatibility with individual products before mixing.
Is Seasol Seaweed Concentrate safe for Australian native plants?
Yes, Seasol Seaweed Concentrate is safe for use on Australian native plants. It contains low phosphorus levels (0.02% w/v), making it suitable for phosphorus-sensitive species. Its role as a plant conditioner rather than a high-analysis fertiliser means it supports plant health without the phosphorus toxicity risk that affects many native species.
Bob Irvine (verified owner)
Easy to use fast results ,Fast shipping
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Andrew (verified owner)
Love these measuring bottles, just so handy and convenient and a lot less fuss than pouring from much larger containers each time.
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