Seasol Seaweed Concentrate (Commercial Grade)

Seasol Commercial Seaweed Concentrate is a 100% liquid seaweed plant conditioner containing natural compounds, trace elements, alginates and carbohydrates extracted from brown kelp.

Seasol International Pty Ltd manufactures this product at twice the concentration of the retail Seasol formulation, making it suited to large-scale horticultural, agricultural and turf applications. Apply via foliar spray, drip irrigation, boom spray or pivot irrigator at 5 to 10L/ha, or through small-volume equipment at 3 to 5mL per litre. Seasol Commercial holds Australian Certified Organic (ACO) certification and is filtered to 150 microns, ensuring compatibility with all conventional spray equipment and irrigation systems.

Available in 5L and 20L. Registrant: Seasol International Pty Ltd. This product is a plant biostimulant and is not required to be APVMA-registered.

Click For Technical Info & Tips For Use
5 out of 5 (2 customers reviews)

QuantityDiscountStatus
2 or more$110.00 eachAvailable
2 or more$250.00 eachAvailable
-
+

Free & Fast Shipping

Not able to be delivered to a PO box Live remotely? Please ensure a courier can reach your address. Click here for shipping info or give us a call.

This item is dangerous and requires a courier! Ensure a courier can reach your address.
Don’t worry, shipping is STILL FREE!
Click here for shipping info or give us a call.

Ordering multiple large items? They will be shipped on a skid or pallet to ensure that your items arrive safely and securely. The delivery truck will need to be unloaded with a forklift. If you do not have a forklift, please provide an address where a forklift is present.

This item is large and requires a courier! Ensure a courier can reach your address.
Don’t worry, shipping is STILL FREE!
Click here for shipping info or give us a call.

Ordering multiple large items? They will be shipped on a skid or pallet to ensure that your items arrive safely and securely. The delivery truck will need to be unloaded with a forklift. If you do not have a forklift, please provide an address where a forklift is present.

Seasol Seaweed Concentrate (Commercial Grade) SEASOL-COMMERCIAL Seasol

Description

Seasol Seaweed Concentrate (Commercial Grade)

Seasol Seaweed Concentrate is a complete garden health treatment. The Commercial Grade is a higher concentration than regular grade Seasol. Seasol Seaweed Concentrate is a certified Australian Organic Registered Farm Input.

Seasol Seaweed Concentrate is a 100% liquid seaweed plant conditioner that provides a synergistic range of natural compounds, trace elements, alginates and carbohydrates from a blend of brown kelps. The seaweed is not harvested from living stands but is sustainably sourced from storm-cast material collected from remote locations that are free from pollution. This ensures the highest possible quality and consistency in every drum. 

Seasol Seaweed Concentrate is a plant stimulant used to boost plant metabolism. It is 100% soluble and can be applied either to the soil or the foliage. It is designed to provide benefits that complement your existing fertiliser program.  It should never be applied undiluted as the water is the carrier to ensure proper coverage. Once diluted, it should be used within 24 hours.

Seasol is filtered to 150 microns so that it is suitable for application with any conventional spray equipment, including boom sprays or irrigation equipment. For plants that are hard to wet, include a nonionic wetting agent. Best practice requires that application be avoided under extreme weather conditions.

How does Seasol Seaweed Concentrate work;

Throughout history, Seaweed and its effect on plant growth has been well documented. Seasol seaweed concentrate is a complete garden health treatment that contains plant nutrients, trace elements, alginic acid and other bioactive compounds. Seasol promotes healthy roots, encourages beneficial soil microorganisms, stimulates flowering and fruiting and helps plants to cope with stresses like heat, drought, frost and pest and disease attacks.

Seasol is derived from a blend of the finest brown kelps from around the world, including King Island Bull Kelp (Durvillaea potatorum) 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. Knotted Kelp grows in shallow intertidal waters. When it is harvested, care is taken not to remove the whole plant – the base is left intact so that the kelp re-grows. In effect, the kelp is harvested by ‘pruning’.

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

What is the analysis of Seasol Seaweed Concentrate?

Typical Analysis:

  • 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 (Mn) 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) 2574 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
    • Plus a range of trace elements (for detailed analysis, please refer to the Seasol Seaweed Concentrate Analysis)

Pack Sizes: 5L & 20L

Manufacturer: Seasol International

Features & Benefits

  • Aids plant establishment and reduces transplant shock in seedlings, transplants and cuttings
  • Stimulates root growth and enhances flowering and fruiting across all crop and horticultural plant types
  • Enhances soil microbial activity and supports beneficial soil biology for long-term soil health
  • Increases plant tolerance to adverse environmental conditions, including heat, frost and drought stress
  • Suitable for foliar spray, boom spray, drip irrigation, micro-irrigation, pivot and overhead sprinkler application
  • Certified organic under the Australian Certified Organic (ACO) Standard 2019, and BioGro New Zealand certified
  • Filtered to 150 microns, ensuring compatibility with all conventional spray and irrigation equipment without nozzle blockage
  • Twice the concentration of the retail Seasol formulation, reducing storage volume and handling for large operations
  • Sustainably sourced from storm-cast brown kelp collected at remote, pollution-free coastal locations
  • Complements existing fertiliser programs as a standalone plant health treatment applied to soil or foliage

Share your thoughts!

5 out of 5 stars

2 reviews

Let us know what you think...

What others are saying

  1. Bob Irvine

    Bob Irvine (verified owner)

    Easy to use fast results ,Fast shipping

    Upvote if this was helpful (0) Downvote if this was not helpful (0) Flag for removal

    Something wrong with this post? Thanks for letting us know. If you can point us in the right direction...

  2. Andrew

    Just great

    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.

    Upvote if this was helpful (0) Downvote if this was not helpful (0) Flag for removal

    Something wrong with this post? Thanks for letting us know. If you can point us in the right direction...

×

Welcome back

Existing account holders please login below via Email or Google Account or Click here to register your NEW FREE ACCOUNT.

Already Registered? Sign in with your email
Register for an account

Secure Checkout

You can shop with Specialist Sales online store with confidence. We have partnered with PayPal, Master and Visa Card which is provided by Braintree. Braintree payment technology accepts credit cards and electronic payments safely and securely for our customers.

Braintree transactions are processed using the 3D Secure framework to ensure your sensitive customer information and credit card processing is safe and secure. Similarly, PayPal also provides comprehensive buyer protection for your peace of mind.

Your information is safe

Specialist Sales adheres to strict industry standards for payment processing, using industry leading security protection measures including 128-bit Secure Sockets Layer (SSL) technology for secure Internet Protocol (IP) transactions, and compliance with the Payment Card Industry Data Security Standard (PCI DSS).

Continue as a Guest

Directions Of Use

Seasol Seaweed Concentrate Commercial Grade directions for use:

Application Method Notes Rate
Foliar sprays For actively growing plants, vines and trees — aids iron nutrition and plant stress tolerance 5–10L/ha
Boom sprayers and under-tree sprinklers For all spray equipment types — use the area covered by one tank to determine the volume required 5–10L/ha
Drip or micro-irrigation systems Use higher rates on lighter soils 5–10L/ha
Overhead sprinklers — travelling or pivot irrigators Use higher rates on lighter soils, lower rates on heavier soil (10mm of irrigation requires 10–50L of concentrate per hectare) 1–5L per mm of irrigation
Hand sprayers and knapsacks (small volume) Dilute in water before spraying; do not apply undiluted 3–5mL per litre
9-litre watering can Dilute thoroughly and apply evenly 20–50mL per can

Rates are a general guide only. Before opening, carefully read Seasol Seaweed Concentrate Commercial Grade directions for use, precautionary and protection statements, storage and disposal, safety directions and first aid instructions. The product is designed for the particular purpose indicated on the label. Failure to use the product strictly as directed may be illegal and dangerous, and render the product ineffective.

Questions and answers from customers

    An arborist has recommended that I use Seasol around a number of large 80-year-old eucalypt trees on my bush property after he prunes them (removing dead wood and branches) to assist the trees after the pruning and encourage more leaf growth and healthier trees. Should I use Seasol Seaweed Concentrate (Commercial Grade) or another Seasol product? How often should I use Seasol on these eucalypts? 

  1. Q An arborist has recommended that I use Seasol around a number of large 80-year-old eucalypt trees...... Read more
    Asked by greg.holding on February 23, 2025 9:20 am
    Answered by the admin

    The directions for use for Seasol Seaweed Concentrate (Commercial Grade) specify rates for large and/or stressed trees, indicating that this product could benefit your situation. The directions of use specify that you should apply this product monthly to the soil around your trees' dripline (canopy edge). To the best of our knowledge, the ingredients used to manufacture Seasol Seaweed Concentrate (Commercial Grade) are better quality and designed for commercial applications versus non-commercial grade Seasol options, as such this could be a good option for you to achieve the best results with your Eucalypt trees. Please don't hesitate to clarify this with the manufacturer, Seasol, at (03) 9721 4100. 

  2. If Seasol Seaweed Concentrate (Commercial Grade) is a more concentrated product than regular Seasol, why are the dilution quantities the same?

  3. Q If Seasol Seaweed Concentrate (Commercial Grade) is a more concentrated product than regular Seas...... Read more
    Asked by Aaron on September 1, 2024 6:02 pm
    Answered by the admin

    To our knowledge, the ingredients used to manufacture Seasol Seaweed Concentrate (Commercial Grade) are better quality and designed for commercial applications. Please feel free to clarify this with the manufacturer, Seasol, at (03) 9721 4100

  4. I'm looking to use Seasol Seaweed Concentrate on garden plants as a foliar spray and will be applying it with a 10L battery powered spray pack. How much Seasol should I be mixing in for 10 litres of water?

  5. Q I'm looking to use Seasol Seaweed Concentrate on garden plants as a foliar spray and will be appl...... Read more
    Asked by Jordan on June 26, 2024 5:09 pm
    A

    Seasol Seaweed Concentrate's recommended mixing rate ranges from 20mL to 100mL diluted in 9L water. The lower rates are generally used on less hungry plants, such as ferns or potted plants, with medium rates (30mL) recommended for veggies and gardens and higher rates for large trees or stressed plants. Refer to the 'directions of use' table, which can be found on the Seasol Seaweed Concentrate product screen. Scroll down to the 'Directions of Use' heading and select. Here you find a detailed table with situations, dilution rates, and frequency of application.

  6. Hi, I have an acreage block in southeast Queensland with newly planted turf, approx 800m2. A watering can is out of the question, and I don't have a boomspray, but I do have a 30ltr mobile sprayer. Can I spray the area and then water it in? If so, what is the strength ratio in the sprayer, and how many square metres (m2) should it cover? I also need to apply a Seasol wetting agent. The same question applies as above. Thank you.

  7. Q Hi, I have an acreage block in southeast Queensland with newly planted turf, approx 800m2. A wate...... Read more
    Asked by Ian on November 18, 2023 12:23 pm
    A

    Although an even coverage will be achieved via boom spray, Seasol Seaweed Concentrate can still be applied via a hand spray. Seasol Commercial must be diluted using sufficient water to achieve adequate coverage when applied as a foliar spray. The recommended rate for turf is 10L/10,000m2 or 1mL per 1m2. Specialist Sales stocks various soil surfactants but does stock Seasol Soil Wetter. For further information on Seasol Soil Wetter, please contact the manufacturer Seasol Hort and Ag p. 1800 335 508  w. https://seasolhortandag.com/

  8. How many litres of Seasol Seaweed Concentrate per ha would you recommend in a pasture scenario?

  9. Q How many litres of Seasol Seaweed Concentrate per ha would you recommend in a pasture scenario?... Read more
    Asked by Joseph on April 20, 2023 8:50 pm
    Answered by the admin

    As Seasol Seaweed Concentrate does not have a recommended rate for use in pasture situations, we suggest using a similar rate as advised for Seasol PastureMasta Fertiliser & Soil Conditioner. The rate of 5-10L/Ha can be applied via a boom spray application. For all types of spray equipment, use the area usually covered by one tankful to determine how much product to add.

  10. Hi, Does Seasol Commercial Concentrate have a shelf life?

  11. Q Hi, Does Seasol Commercial Concentrate have a shelf life?
    Asked by Steve on December 22, 2022 9:31 am
    A

    Seasol Seaweed Concentrate does not have a best-before or expiry date. If possible, the best practice would be to use the contents within a few years (3-5) of purchasing. Store in a closed, air-tight container in a cool, well-ventilated area. Do not store for prolonged periods in direct sunlight.

Send me a notification for each new answer.

Disclaimer: This information and product advice is not intended to be advice or recommendations for any specific use or circumstance. You should seek specialist advice before using any product. Always follow the manufacturer’s guidelines. Specialist Sales liability is limited.

Tips For Use

The Benefits of Seasol

Before You Apply

  • Always dilute Seasol Commercial before use. Never apply undiluted. Water is the carrier — dilution is essential for proper coverage and to avoid plant damage.
  • Once diluted, use the spray solution within 24 hours.
  • Do not tank-mix with pesticides when the target outcome is cold-stress tolerance. Field experience shows this combination reduces effectiveness.

Irrigation Application

  • Apply Seasol throughout the full duration of the irrigation run. This ensures a consistent dose from the canopy through to the target soil depth.
  • For irrigated pasture, apply Seasol in the first irrigation after grazing to support rapid regrowth and high palatability.
  • Target applications at critical crop development stages for maximum growth response.

Stress Management Timing

  • For heat stress protection, apply a 10L/ha foliar spray 5 to 7 days before expected hot conditions. After a hot spell, follow up with 5L/ha to support recovery.
  • For cold-stress tolerance, apply 10L/ha foliar spray as soon as forecasts indicate developing cold risk. Start early in the season for best results.

Storage

  • Store in a cool, dry, well-ventilated area, away from direct sunlight.
  • Keep containers tightly sealed. Do not store near incompatible materials or strong oxidising agents.
  • Protect from freezing.

General Precautions

  • As with all plant treatments, wash edible plants before consuming them after application.
  • Avoid skin and eye contact. Wash your hands after use. Wear gloves and eye protection when handling concentrate.
  • If splashed in the eyes, hold eyelids apart and flush with running water for several minutes. Seek medical attention if symptoms persist.

Safety and First Aid

  • If poisoning occurs, contact a doctor or the Poisons Information Centre. Phone Australia 131 126.
  • For further information, refer to the Safety Data Sheet (SDS).

This information and product advice are not intended as advice or recommendations for any specific use or circumstance. You should seek specialist advice before using any product. Always follow the manufacturer’s guidelines. Specialist Sales liability is limited.

Withholding Period

Withholding Period Details (WHP):

  • Seasol Commercial Seaweed Concentrate is not an APVMA-registered agricultural chemical.
  • No statutory withholding period applies to this product for produce or stock.
  • As a general precaution, wash edible crops before consuming, following any plant treatment application.
  • Refer to Seasol International Pty Ltd for the current product label and any applicable use restrictions.
  • Not applicable when used as directed.

SDS & Technical

Seasol Seaweed Concentrate Australian Organic Certificate Download Pdf
Seasol Seaweed Concentrate SDS Download Pdf
Seasol Seaweed Concentrate Analysis Download Pdf
Seasol Seaweed Concentrate Fertigation Technote Download Pdf
Seasol - Frost Management Download Pdf
Seasol - Heat Tolerance Download Pdf

Related Products