mg deficent according to http://images.google.com/imgres?imgu...l%3Den%26lr%3D

According to the same site

Calcium plays an important role in maintaining cell integrity and membrane permeability.



Young leaves are affected first and become small and distorted or chlorotic with irregular margins, spotting or necrotic areas. Bud development is inhibited, blossom end rot and internal decay may also occur and root may be under developed or die back. Deficiency will cause root tip die-back, leaf tip curl and marginal necrosis and chlorosis primarily in younger leaves. Symptoms: young leaves develop chlorosis and distortion such as crinkling, dwarfing, developing a strap-like shape, shoots stop growing and thicken.



Difficult to distinguish visually. May precipitate with sulfur in solution and cause clouding or residue in tank. Excess calcium may produce deficiencies in magnesium and potassium.






These are rarly seen except when deminstrated by lock up
What are you feed them
karmaxul Reviewed by karmaxul on . Does this look like Mag def to you? Skunk #1 clones in DWC - 5.8 PH, Water temps ~70-73F, 400W MH, PPM of Flora Nova Grow is around 500-550 PPM in RO water. Some of the leaves are getting to look like this. Beginning with tiny spots and then growing rusty like this. I did have some problematic pH problems because I thought I was getting it to a normal pH but my meter was off so it was like 5.3-5.5 for a week. Fixed now. Rating: 5