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Iron deficiency?

Treated by lowering soil pH to 6.5 or less. Avoid fertilizers that contain excessive amounts of manganese, zinc, and copper, which inhibit iron uptake. High levels of phosphorus compete with the uptake of iron.

Improve drainage.

note: exposing light to nutrient solution with UV light causes iron to precipitate.
Revanche21 Reviewed by Revanche21 on . HELP! problems with 1 wk old babies! I recently got 6 kush clones from a clinic. They all were growing well but now they have started to get yellow on the edges. The center of the leaves is still mostly green and the veins are green. They growth doesnt seem to be stunted but i am worried because the yellowing is moving up the plant. I have a 400 watt hps and i use general hydroponics nutes. I think it might be a mg or zinc problem but it doesnt look to me like nute burn. please help! Rating: 5