What Is It and Do You Need It?
Cal-Mag stands for calcium and magnesium, two plant nutrients that are essential for plants but are seldom mentioned when discussing plant fertilizer. You can purchase calcium and magnesium-containing fertilizer or add Cal-Mag to your usual fertilizer. Which choice is preferable, and do you require either of them?
Calcium (Ca) is a mineral crucial for plant growth that is essential for the formation of cell walls. Additionally, it is essential for triggering enzymes that perform a variety of tasks and is crucial for the growth of fruit. Calcium (Ca) is a macronutrient because plants use it in a sizable proportion. Localized rot and stunted development at the tips of plants are symptoms of calcium deficiency. Fruit, leaf tips, and buds do not form properly; the leaves are dark green, and the stems are frail.
A common symptom of a deficiency is the black end on tomatoes, called blossom end rot.
Another crucial ingredient for plants is magnesium (Mg). This macronutrient, which makes up the majority of chlorophyll, is necessary to activate enzymes, transit other plant nutrients, and stabilize nucleic acids.
Since this nutrient is transportable, a plant will shift magnesium from older leaves to where it is needed if its levels are low. Older leaves begin to yellow as a result of this.