| Re: Is this Phosphorus deficiency?
Looks can be deceiving. A phosphorus def will look similar but wont effect the edges in the way your plants have been effected. Add 2 teaspoons Epsom salt (available at any grocery store) to 1 gallon of water and water plants. Also spray down your girls with the same strength solution early in the first part of the lights on period. She should start to balance out soon after. Cannabis is a Mag hungry plant and mag can easily be locked out if pH fluctuates often or is incorrect.
hope this helps.
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