Formerly Tidy Hydro | Established 2013


Canna CalMag Agent

Canna CalMag

Hardens soft water to keep your plants growing strong and healthy

Gives your plants the calcium & magnesium missing in soft water areas

  • Treats Calcium and Magnesium deficiencies

  • Increase in nutrient uptake

  • Stronger plants with better-quality flowers

  • Increase the EC of soft water

Why Use CalMag Agent?

Calcium, magnesium and iron required for photosynthesis. These are often missing in soft water areas with an EC below 0.4.

When these elements are missing then multiple deficiencies will often appear around the same time and growth can slow considerably.

CalMag adds calcium and magnesium which raises the EC level of soft water to between 0.4 to 0.7 - The ideal range which CANNA nutrients are designed to work at.

Do your plants have Deficiency Symptoms?

Calcium Deficiency Symptoms 

  • Brown spots appear on new growth at the top your plant 

  • Growth slows down and buds develop slowly

Calcium deficiencies tend to appear on leaves that are still actively growing, so brown spots will appear on new growth and also on the edges of mature leaves lower down the plant.

Magnesium Deficiency Symptoms

  • Appear on mature growth lower down the plant

  • Leaves become light green between veins and may develop small brown spots

  • Leaves eventually turn yellow and wither on the plant, starting from the bottom of the plant and moving upwards

Iron Deficiency Symptoms

  • New growth on your plant will be yellow

  • Affected leaves stop growing

  • Related to calcium deficiency

Unsure if your water is hard or soft? Then take a look at our UK Hard Water Map.


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      Delivery Information

      We will dispatch your order as soon as possible and should normally be received within 3 to 5 working days in some cases please allow up to a maximum of 14 days. The delivery rate you pay is calculated on two things, the weight of your order and the postcode you enter. Currently we only deliver to the UK.

      Delivery Rates
      Weight Delivery Cost
      0-5kg £3.50
      5-20kg £7.50
      20-30kg £15.00
      30kg+ £50.00

      Free shipping for orders over (Excluding bulky items) £150

      Returns Policy and Procedures:

      Your rights to return goods are protected under the EU distance selling directive. You are responsible for the cost and risk of damage when returning goods so postal insurance should be taken out to cover the value of the goods.

      Unwanted Item(s).

      If you have made a purchase form Tidy Horticulture you are entitled to cancel your order and return the goods within 7 working days for a full refund, including the cost of delivery. Notify us by telephone or email quoting the order number given and you will receive your refund within 30 days. Goods returned should be in a saleable condition and in their original packaging and with proof of purchase. Any unwanted items returned after this date will be at the discretion of management and any postage costs paid by us will be recovered.

      Item(s) damaged in transit.

      If your goods have been delivered by a courier and the item(s) or packaging are damaged then please sign for your delivery as ‘damaged’ and notify us by telephone or email within 48 hours. If the item(s) have been damaged in transit then you can return it to us within 30 days of receipt for a full refund or exchange.

      Item(s) faulty.

      If the goods delivered are faulty then you have a right to return them within 30 days. Make sure all warranty information is kept with your item. After 30 days you can also contact the manufacturer directly to enable them to rectify the problem for you. All goods must be returned in their original packaging for a full refund or exchange.


      Tidy Horticulture
      Unit 60 - 61
      Faraday Mill Business Park
      Faraday road
      PL4 0st

      Tel: 01752 225 225