Quote Originally Posted by stinkyattic
When I've seen Mg deficiency it manifests as paler green striping rather than white.
If that's Mg def, you have had a deficiency for a long time and didn't catch it in the early stages, and your temps are contributing to the white appearance of those necrotic patches.
I WAS WRONG very sorry :wtf: ... I should have said a magnesium overdosing, rather than 'deficiency' ... I suspected that, because of this Plant Problem Guide paragraph :...


QUOTE : "One of the worst problems a person can have is a magnesium def caused by a ph lockout. By giving it more magnesium to cure the problem when you are thinking you are doing good, but actually you are doing more harm then good. When the plants canâ??t take in a nutrient because of the ph being off for that element, the plant will not absorb it but it will be in the soilâ?¦ therefore causing a buildup. A buildup will be noticed by the outer parts of the plant becoming whitish and or a yellowish color. The tips and part way in on the inner leaves will die and feel like glass. Parts affected by Magnesium deficiency are: space between the veins (Interveinal) of older leaves; may begin around interior perimeter of leaf. " UNQUOTE: ...

I saw the 'whitish' reference, but didn't realize I was looking at the 'over-nuting with magnesium' paragraph ... I feel so cheap, and un-worthy