ISN Nutrients - Cal Mag – Premium Calcium, Magnesium & Iron Fortifier
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.
ISN Nutrients - Cal Mag – Premium Calcium, Magnesium & Iron Fortifier
ISN Cal Mag is a professional-grade mineral supplement engineered to provide optimum levels of Calcium, Magnesium, and Iron, alongside a specialised suite of essential trace elements. Designed to prevent and correct common deficiency symptoms, this premium additive serves as a vital insurance policy for high-performance crops, particularly those grown in coco coir or under high-intensity lighting. ISN Cal Mag strengthens the plant from the inside out, reinforcing cellular structures to improve "plant hardness" and building a robust vascular system for efficient nutrient transport. Beyond nutrition, it acts as a biological buffer, protecting plants against excessive nutrient build-up and increasing systemic resistance to environmental stressors. By ensuring these critical elements are always bioavailable, ISN Cal Mag drives the development of thick, vibrant green foliage and prevents the loss of young flowers and fruit.
Best For: Preventing leaf yellowing and curling, stopping the drop of young flowers and fruit, correcting Iron and Magnesium deficiencies, and buffering coco coir against calcium lockout.
Key Features
- Triple-Action Mineral Blend: Delivers a balanced ratio of Calcium, Magnesium, and Iron to support chlorophyll production, enzyme activation, and structural integrity.
- Structural Reinforcement: Stimulates aggressive root growth and increases "plant hardness," creating sturdier stems capable of supporting heavy, high-yielding buds.
- Yield Protection: Actively prevents the premature loss of flowers and young fruit, ensuring your plants maintain their maximum reproductive potential throughout the bloom cycle.
- Deficiency Shield: Eliminates common growth stalls such as distorted leaf growth, interveinal chlorosis (yellowing), and deformed fruit development.
- Environmental Resilience: Fortifies cellular walls, allowing plants to remain vibrant and productive even when faced with temperature fluctuations or nutrient-heavy feeding programmes.
Specifications
- Brand: ISN Nutrients (International Super Nutrients)
- Product Type: Concentrated Cal-Mag & Trace Element Supplement
- Key Ingredients: Calcium, Magnesium, Iron, and Essential Trace Elements
- Application Phase: Full Cycle (Vegetative and Flowering Stages)
- Compatible Media: Coco Coir, Hydroponics, Rockwool, and Soil
- Available Sizes: 1 Litre and 5 Litre
Ideal For (Uses)
- Coco Coir Conditioning: Essential for growers using coco-based substrates to satisfy the media’s natural cation exchange demand and prevent Calcium lockout.
- High-Intensity LED/HID Growing: Perfect for plants under powerful lighting that require elevated levels of Magnesium and Iron to maintain high photosynthetic rates.
- Foliage & Bud Strengthening: Use as a regular additive to ensure leaves remain thick and dark green, providing the energy needed for dense floral development.
| Size |
1L, 5L |
|---|
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!
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.
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.
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