Can you give a plant too much Cal-Mag?
Always be mindful of the quantity of Cal-Mag you use, as these supplements contain either nitrates or carbonates. Excess use can lead to increased levels of these molecules, which can be bad for your plant in the long run.
Just make sure you don't overdo it when adding to the nutrient solution. Just 0.5ml per Litre is fine in most cases. CalMag contains 3.2% calcium, 1.2% magnesium , 0.1% iron and 2.6% nitrogen.
Use with every watering as needed. Mix well and adjust pH accordingly. Shake well before each use. Add 1 tsp (5ml) per gallon of water, Mix well and adjust pH to 6.2-7.0 before application.
Best Time To Give Cal Mag - YouTube
Within a week or two of starting the treatments, the plant should show signs of recovery (e.g., old leaves falling off, new leaves growing with no spots).
How Much Cal-Mag Should I Use? Cal-Mag is really easy to use. All you have to do is add a teaspoon of powder, or 5 milliliters of liquid, for every gallon of water in your hydroponic system. For application with soil-based growing, add the same amount into each gallon of water you put into your watering can.
Once your base nutrients are mixed in well, you can add cal-mag if you are using it. This is an especially important supplement for those using RO water, as the filter will strip out these minerals.
You don't want to use liquid nutrients every time you water—use them every other watering, or two waterings on, one off. It depends on the complexity of your soil and the health of your plants. Too many nutrients will damage your plants. Giving weed plants the proper amount of nutrients requires careful monitoring.
Cal-Mag deficiencies can be catastrophic to gardens as well as hydroponic systems. But in most instances, Cal-Mag supplements are not essential as both nutrients are very easily available in water and soil.
Yes you can foliar spray with Cal-Mag Plus and it is a great way to quickly correct deficiencies during the vegetative and transition phases. We do not recommend applying any product via foliar spray late into the flower cycle when growing tight flowers, as excess moisture can lead to mold and mildew.
Does Cal Mag help with nitrogen deficiency?
In addition to being at the heart of many plant problems, Calcium and Magnesium deficiencies are also some of the most commonly misdiagnosed problems by indoor cannabis growers. I've seen growers prescribe Cal-Mag for almost everything, from slow growth to nitrogen deficiencies.
