Magnesium Deficiency
lighter green or yellow coloring will begin to show between the veins and edges of the lower & older leaves. this is one of the classic signs of magnesium deficiency. If you don't react to it promptly, magnesium defiency can spiral out of control and cause your plant to lose a lot of lower leaves very quickly. The plant will pull magnesium out of older leaves and bring them to the newer leaves and That's why a magnesium deficiency usually appears towards the bottom of the plant and on older, less important leaves. The edges of the leaves may become yellow or bright green and may start feeling crispy to the touch. This crispiness around the edges.
Solution For Magnesium Deficiency
the plant may show signs of a magnesium deficiency if the pH at the roots is too low, especially in hydro. Thats because when the pH of your root zone is not correct , your plant cannot properly absorb magnesium through the roots as needed.
Often with this deficiency, the magnesium is present, but the roots cannot absorb the magnesium properly due to an improper pH. Therefore it is very important to maintain the correct pH, make sure the pH does not get too low / acidic in order to avoid a magnesium deficiency.
Adding more magnesium to a garden when there is a pH lock out will probably not help because the plant will not be able to absorb any magnesium until the pH has been corrected. If there's already enough magnesium, adding more can cause other apparent deficiencies by locking out other nutrients from the plant.
