It's low in the big three – nitrogen, phosphorus and potassium, but provides an astonishing range of other micronutrients, as well as plant hormones that stimulate root growth.
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. But in exceptional circumstances, supplements are essential.
Cal-Mag improves stalk and leaf growth and prevents common deficiencies. It's fully compatible with all growth mediums and can even be applied as a foliar spray for rapid uptake. Add Cal-Mag to every watering for a lush green canopy.
You should use 5 ml/gallon of Cal-Mag Plus during the vegetative and early bloom stages. During the halfway point of the flowering stage, you might want to reduce the application to 3 ml/gallon, to avoid adding excess nitrogen to the nutrient solution based upon your plant specific needs.
When using Silica Blast, always add Silica Blast into your reservoir FIRST followed by Cal-Mag. If Silica Blast is not being used and Cal-Mag is, Cal-Mag should be added FIRST, then add the remaining nutrients.
Shake well before use. Mix 1 tsp (5 mL) per gallon (4 L) of water. Begin use just before bud development. Continue use as needed, not more than once per week.
Excessive calcium can interfere with uptake of other nutrients and induce deficiencies in other positively charged ions (e.g., ammonium, magnesium, potassium). Symptoms appear first on older leaves as yellowing between leaf veins, and in severe cases can be followed by death of these areas and defoliation (Fig. 262).
Signs of Cal-Mag Deficiency During the Seedling Stage
Stunted growth. Yellow and brown discolouration of leaves. Weak stems. Leaves that curl upward or downward.
You can use calnesium or organical magic throughout your plant's entire life cycle during rooting, vegetative growth, and flowering. It can be used as a foliar spray as well and can be given to your plant every feeding.
Once your base nutrients are mixed in well, you can add cal-mag if you are using it.
Is CalMag OAC nitrogen free? Yes, CalMag OAC is nitrogen free - you can use it until the very end of your bloom. There are some amino acids in our plant extracts which contain nitrogen, however it is minimal and would equate to approximately . 01%.
Too much magnesium inhibits the uptake of calcium, and the plant displays general symptoms of an excess of salts; stunted growth, and dark-coloured vegetation.
Calcium Toxicity
In and of itself it is not a harmful nutrient. However, excess levels of calcium in the soil can affect a plant's uptake of other nutrients. This can cause a deficiency in these vital elements.
You can treat a deficiency by purchasing supplements containing calcium and magnesium called Cal-Mag. Plants watered manually should be flushed with pH water containing all the essential nutrients. The level for hydroponically grown plants can be checked through the reservoir.
Foliar Application – CalMag can be used as a foliar feed to correct deficiencies relating to poor establishment or environmental problems. Add at a rate of 15mL/L and spray onto the leaves. Spray once per week until the issue is resolved.
Eggshells: Eggshells are a slower way to add calcium to soil than bone meal, as they have to break down for the calcium to become available for use by plants. You can can add eggshells to the soil when planting seedlings, or you can add eggshells to compost then add the compost to soil when it's ready, or you.
Magnesium deficiency
Symptoms: Yellowing between the leaf veins, sometimes with reddish brown tints and early leaf fall. Magnesium deficiency is common in tomatoes, apples, grape vines, raspberries, roses and rhododendrons.
Nutrient deficiency symptoms occur as yellowing of leaves, interveinal yellowing of leaves, shortened internodes, or abnormal coloration such as red, purple, or bronze leaves. These symptoms appear on different plant parts as a result of nutrient mobility in the plant.
Symptoms of calcium deficiency first appear on younger leaves and tissues, growth is inhibited, and plants have a bushy appearance. The youngest leaves are usually small and misshapen with brown chlorotic spots developing along the margins, which spread to eventually unite in the center of the leaves.
Calcium deficiency symptoms appear initially as localized tissue necrosis leading to stunted plant growth, necrotic leaf margins on young leaves or curling of the leaves, and eventual death of terminal buds and root tips. Generally, the new growth and rapidly growing tissues of the plant are affected first.
The recovery is dependent on the severity and length of time the calcium deficiency has been present. Generally, the plant will recover well enough within about one week for new growth to begin.
Can you mix cal-mag with other nutrients? Yes, cal-mag can be mixed with other nutrients, but using the correct ratio is essential. This ensures that your plants get the proper nutrients and won't suffer from nutrient deficiencies.
Will Cal-Mag Raise pH? Calmag does have a tendency to raise the pH of your growing medium. If you've got plants in garden beds or pots, the change is minimal and can be safely ignored.
Cal-Mag does not expire as long as it's stored in a cool, dark and dry place.