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Greens Horticulture - Serving Growers All Over The UK

Intense Mag Cal

Regular price £15.26 £16.95 | Save £1.69 (9% off)
Tax included. Shipping calculated at checkout.
In Stock
SKU: 1571
Spend £50.00 more for free delivery (shipping surcharges still apply)

Intense Mag Cal

1l - £15.26
  • 1l - £15.26
  • 5l - £44.96
  • 10l - £80.96

Intense Mag Cal


Intense Mag-Cal is as its name suggests a Magnesium and Calcium additive for addressing deficiencies and also as a conditioner for R.O. water.

Many customers using coco and soil use this product as a matter of course up until a few weeks into flower to avoid deficiencies in magnesium and calcium which have become fairly common in recent years.

Care should be taken to avoid over-use later on in the flowering cycle as Mag-Cal also includes a fair amount of Nitrogen which is not conducive to abundant fruiting/flowering. If a magnesium or calcium deficiency is experienced later on in the cycle then look to the Canna Mono Elements to remedy this but as always extra care should be taken with identifying and treating deficiencies - as it is all too easy to produce toxicity or throw out the whole balance of your nutrient regime.

Intense Mag-Cal is available in 1l, 5l, and 10l bottles.



Delivery Information

Most orders are shipped within 24 hours.

Orders are currently shipped with Parcelforce (Express 24 service for standard and heavy/bulky items) or DPD Local (Premium next-day), a signature will be required on delivery. We have been shipping orders for 15 years and our courier choices are subject to change as service levels fluctuate.

All orders are shipped on a next day courier service – you will be informed via email or SMS the evening your order leaves us so you know to expect it the next day. On the morning of delivery you will get another SMS or email informing you of the expected delivery time.

If you have any questions on delivery please get in touch.

As the website calculates some charges by weight it is possible that shipping is not calculated correctly. We reserve the right to get in touch in these circumstances we will request the additional amount or offer to refund the order.

UK Delivery

Standard delivery to the UK Mainland addresses (excluding Scottish Highlands & Islands, offshore and N.I.) is charged at a flat rate of just £5.95 per order or £7.95 (for the premium next-day service), standard delivery (with Parcelforce) is free* for orders over £50.

*Large and/or heavy items attact a surcharge from our courier - shipping surcharges are calculated per item and are applied regardless of order value.

Non-UK mainland destinations are charged by weight.

International Delivery

Coming soon…

Collect in Store (Bristol)

We now offer a 'collect in store' option, which allows you to pay for goods online and collect from our Bristol store at time that suits you (within our opening hours).

The process is simple:

  1. place your order and pay online, select 'Pick Up' at checkout;
  2. receive an email confirming that the order is ready for collection;
  3. bring/show your confirmation email and photo ID to collect your order.


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