ISN Nutrients - Seaweed – Premium Kelp & Organic Root Zone Conditioner

$39.90

Size: 1L

Size: 1L
1L
5L
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SKU: 4257
Availability: In Stock Backorder Out of stock
Shipping Weight: 1.0 kg

Please note the above shipping is an estimation only. Actual shipping cost can be calculated on the checkout page.

Important shipping notice: This product is not stocked at our Thomastown, VIC warehouse and is dispatched from another local warehouse. Please allow approximately 1-2 weeks for it to reach us before it is ready for pickup or dispatch.

Description

ISN Nutrients - Seaweed - Premium Kelp & Organic Root Zone Conditioner

ISN Seaweed is a professional-grade organic biostimulant specifically designed to enrich the root zone and maximise plant performance in high-yield cultivation systems. Cold-processed to preserve its natural integrity, this premium formula delivers a rich source of biological enzymes, minerals, soluble carbon, sugars, organic vitamins, and over 65 natural amino acids. By delivering these essential organic building blocks directly to the rhizosphere, it accelerates lateral root development, improves cell wall strength, and enhances the plant's natural resistance to environmental stress.

While traditional seaweed extracts can cause stability issues in water-based systems, ISN Seaweed is precision-formulated to remain completely stable in hydroponic reservoirs. It ensures your plants benefit from a rich organic profile without the risk of clogged drip lines or reservoir fermentation. Whether used as a regular supplement or a stress-recovery aid, ISN Seaweed builds a highly receptive and efficient root mass for maximum nutrient uptake throughout the entire growth cycle.


Best For: Accelerating root development and lateral branching, conditioning the rhizosphere with soluble organic carbon, boosting natural plant immunity, and alleviating environmental and transplant stress.

Key Features:

  • Ultra-Rich Organic Profile: Packed with a natural spectrum of essential vitamins, soluble carbon, trace minerals, and over 65 organic amino acids to drive overall plant vitality.
  • Hydroponic-Safe Formulation: Specially refined for recirculating and run-to-waste hydroponic systems, ensuring it won't clog drip lines, gum up pumps, or cause organic spoilage.
  • Dynamic Root Zone Stimulant: Conditions the rhizosphere with organic sugars and carbon, building a highly efficient root mass for maximum mineral absorption.
  • Natural Stress Relief: Fortified with bioactive compounds that act as an organic shield, protecting plants against temperature fluctuations, drought, and transplant shock.
  • Synergistic Organic Performance: Works in perfect harmony with beneficial microbes to create a thriving, active, and protective biological ecosystem in coco, soil, and hydroponics.

Specifications:

Feature Details
Brand ISN Nutrients (International Superior Nutrients)
Product Type Liquid Seaweed Extract / Organic Biostimulant
Key Components Cold-Processed Seaweed, Soluble Carbon, 65+ Amino Acids
Application Phase Vegetative, Flowering, and Transition Cycles
Compatible Media Hydroponics, Coco Coir, Rockwool, and Soil
Available Sizes 1 Litre and 5 Litre

Ideal For:

  • Root Zone Conditioning: Apply continuously from early growth through peak bloom to build and maintain a bright white, highly active root system.
  • Microbial Feeding: Use in combination with beneficial bacteria and fungi to supply a rich food source that accelerates biological colonisation in the medium.
  • Stress Prevention: Integrate into your feeding schedule during transitional phases, repotting, or seasonal temperature shifts to keep plant metabolism stable.

Usage Tip: ISN Seaweed is an excellent partner for ISN Potash during the flowering phase. The organic stimulants in the seaweed help the plant process the high levels of phosphorus and potassium more efficiently, leading to denser, heavier fruit sets and improved flavour profiles.

Oversize Item Delivery

Oversized Item Delivery Options

Since oversized items require special handling, we may need to provide a custom freight quote for your order and will contact you with an updated shipping rate.

Available options include:

✔ Delivery to your closest depot for pickup - default method
✔ Direct delivery - requires forklift on site
✔ Direct delivery with tailgate lift truck (extra fees apply)
✔ Forklift loading at our warehouse (no extra charge if you arrange your own freight)
✔ Direct truck delivery (available in Victoria)

Important Notes:

  • Shipping costs vary by location and method
  • Because of the forklift requirement, delivery to the nearest depot is the default option and will be the method used unless you contact us to request otherwise.

Business Delivery:

  • Business delivery is available for commercial customers only
  • If you select business delivery and your products are bulky, it is your responsibility to ensure you have appropriate equipment (including forklifts) to unload products from the delivery truck
  • If you select business delivery and you are not a business, you risk your product not being delivered and may incur additional fees to retrieve your order
  • Business delivery customers must provide a valid business address and contact information
  • Additional fees may apply for failed delivery attempts due to lack of appropriate unloading equipment

Let us know your preference, and we'll arrange the best solution for you!

Shipping & Lead Times

Important Note on Availability & Shipping

Our warehouse serves as our office and logistics centre rather than a retail showroom. Because we ship from multiple locations and manage high-turnover stock, not all items are available for immediate pickup.

Lead Times:

  • In-Stock Items: Usually ready for dispatch the same day.
  • Supplier-Dependent Items: Usually take 2–8 weeks to arrive, depending on supplier availability. Products from Adloheat may take 8–12 weeks to manufacture—they are made to order in Australia by a small business, and longer lead times reflect the care put into quality.

While we strive for fast delivery, some timelines are subject to supplier availability and are beyond our control. We appreciate your patience as we source the best quality gear for your project.

Biosecurity & Interstate Shipping Restrictions

Due to strict state biosecurity regulations, we are unable to ship some products to certain states and territories:

  • Potting Mixes cannot be shipped to Western Australia (WA), the Northern Territory (NT), or Tasmania (TAS).
  • Seeds cannot be shipped to Western Australia (WA).

Orders placed for these items to restricted states will be cancelled and refunded. It is the customer's responsibility to ensure that the items being ordered can lawfully be delivered to their state or territory.

Price Match Guarantee

We Offer the Best Prices

We are committed to offering our customers the best prices possible. If you find the exact same product advertised at a lower price elsewhere, we invite you to contact us and we will review your price match request.

Price Match Conditions:

  • The competitor must be an Australian-based seller with a physical presence in Australia
  • The product must be the exact same item with a matching SKU or model number
  • The product must be in stock and available for purchase at the competitor
  • The lower price must be publicly advertised and currently available (not a clearance, closeout, or discontinued item)
  • Price matching excludes marketplace platforms including but not limited to Temu and Aliexpress
  • Price matching requests must be made before purchase

How to Request a Price Match:

To request a price match, please contact us at sales@greenhousepolytunnels.com.au with a link to the competitor's product listing, or call us on 0418 438 774. Please include the product details and the advertised lower price. We will review your request and respond within 2 business days.

Still Unsure?

Book an appointment with one of our team members. We are here to assist you every step of the way.