Magnesium deficiency starts on older leaves. They show interveinal chlorosis on the leaf margins and some whitish to light brown necrotic dots. If deficiency is severe, interveinal chlorosis progresses from the margins to the middle of the leaflets. The small veins also become chlorotic, but the bigger veins remain dark green first. Subsequently the whole leaves are yellowing and finally the older leaves die. In this case growth is severely impaired and fruit yield is reduced.
Magnesium deficiency is one of the ones that can look like some of the others and therefore can be harder to diagnose. It can look like phosphorus deficiency but there will be no purpling of the leaves. Some of the brown spots could be mistaken for a calcium deficiency, but without BER.
Correcting Your Magnesium Deficiency
For all PH levels we treat in one of two ways.
- Magnesium sulfate is our choice for treatment, however if you have low PH and are adding the calcium carbonate that we carry, it also has magnesium in it.
- We add to solution at times, directly into the fish tank.
- When we need really quick results or are looking to boost fruit production on certain plants we will mix up a foliar spray for the plants.