Dutch Pro Calmag

Free UK Mainland Delivery on Orders over £60*
  • £23.00
Item in Stock   |   Usually dispatched within 24 hours
  • Strong concentration
  • Free of heavy metals
  • Suitable for every irrigation system
  • Suitable for every substrate
  • No residue

  • Grow charts available from Downloads tab.

Calcium and magnesium are two of the macro elements that are of major importance to the growth and development of plants. Deficiencies in either one of them will lead to a stuck in growth. Since magnesium and calcium are needed in a rich amount, especially under certain growing conditions calcium/magnesium deficiencies are not uncommon. To make sure that your plants will get the right amount of calcium and magnesium, Dutchpro formulated its own revolutionized calcium/magnesium with added nitrogen to balance out the extra need of nitrogen.

Calcium (Ca) is a key structural component of cell walls. As they are formed around every plant cell, calcium is of major importance to build up the cell wall. Furthermore, calcium is also part of many enzymes and it is important as a signaling molecule. Enzymes have many different functions as they speed up processes within the plant by thousands of times. They also help nutrients transport through cells. Calcium is an immobile element, meaning that once calcium is settled in the right place it won’t move again inside the plant. Because of this and the importance to cell division, the first calcium deficiencies are found around the root tips, shoots and young leaves. A calcium deficiency has a major impact on the growth and development of the plant and should be prevented at all costs.

Magnesium (Mg) is part of the chlorophyll molecule (C55H72MgN4O5), which makes up the green pigment of leaves and most importantly absorbs energy from sunlight which is used to create sugars. This means that a magnesium deficiency stops the photosynthetic process and therefore stops the creation of sugars and energy. Magnesium is also an activator of enzymes involved in the production and use of ATP. Due to the importance of magnesium a deficiency is devastating and will seriously harm your crop. Therefore always make sure you provide your plants with sufficient magnesium.

Nitrogen (N) is crucial to plant growth. Nitrogen is one of the most important building blocks in the creation of amino acids, which are transformed into enzymes (proteins). Without nitrogen there wouldn’t be enzymes and they are much needed as enzymes are always used in every process happening inside cells. However, another crucial function is that nitrogen is part of the chlorophyll molecule which gives leaves their green pigment and absorbs energy from sunlight to create sugars. A nitrogen deficiency slows down the growth and development of plants and should be avoided at all time.

How do I make a purchase?

Making a purchase is easy. Simply select your items, click 'Add to Bag'. The item will be added to your shopping bag. Review the items in your shopping bag by clicking the 'Basket’ link at the top of the page. Click on 'Checkout ' and follow the onscreen instructions to complete your order. If you have any problems we can help you, please contact us on 01642 224544 during our opening times.

What payment methods do you accept and is it safe to use my credit card online?

We accept Visa, MasterCard, American Express, Visa Debit, Visa Delta, and Maestro cards. All payments are processed through a secure checkout system provided by SagePay.

Can I place an order over the telephone?

For security purposes we prefer you to place an order online using our secure payment system. If however you are having difficulties placing an order online then we can assist you over the telephone.

Is my personal information kept private?

Please be assured that we consider all of the information you share with us to be totally private and confidential.

Which countries do you ship to?

At present we only ship to UK and Northern Ireland.

Am I able to track my order?

Yes. When we dispatch your order for delivery you will receive a unique tracking number by email. Once in receipt of this tracking number you can check the current status of your delivery.

Is my package insured and do I need to sign for my order?

All your purchases are insured against theft and accidental damage whilst in transit from Great Stuff Hydroponics to your delivery address. Once your package has been delivered and signed for at your specified address, it is no longer covered. To ensure that your purchases arrive safely and in perfect condition, we require proof of delivery for all orders and are unable to authorise for packages to be delivered without a signature.

How long will it take for me to receive my parcel and how much will the postage cost?

All UK orders are shipped by UK Mail Courier. All UK orders over £300 are delivered free of charge.?We aim to deliver your items as quickly as possible but please allow 2-3 working days.

Orders may be delivered to either business or residential addresses as long as the delivery address is the same as the one registered on the credit card. A signature is required for all Great Stuff Hydroponics orders so please use a delivery address where somebody is available to sign for the delivery.

How do I return an item?

Making a return is easy as we have a no quibble returns policy.  If unsuitable items are returned to us within 30 days of receipt we will be more than happy to offer you an exchange or refund provided that you return them to us in their original condition and packaging. 

Before you return an item please email us at info@hydroponics-hydroponics.com to let us know and put a note in with the items you are returning with all your details and order number and reason for return.

When returning items you are strongly recommended to obtain proof of posting as we cannot accept responsibility for parcels lost in transit. We will only refund the cost of postage where the item returned is faulty.

Will I be refunded the full value of my order?

All correctly returned items will be refunded to the original purchaser’s credit card excluding all shipping costs, international customs duties and sales taxes.  Please note that card refunds may take up to 10 business days for your bank to complete, this can vary between card issuers. We will only refund the cost of postage where the item returned is faulty.

Please click the Delivery and Returns link at the bottom of the website for more information on delivery and returns or contact us with any questions.

Please note: Any items added to your basket with the stock message 'Delivery within 5-10 Days' may delay your orders dispatch time, we only send out once all items are ready to ship. It is best if you are in a hurry for an order to contact us first.

Please view our Payment & Security page here.