Question from a fellow grower: I am growing my first plant and it is in its vegetative state. I have it under 18 hours of light, 6 dark under this light. About a week ago I noticed yellow on the bottom leaves edge. Since then, the leaves at the very bottom appear to be dying. I have new growth that looks healthy but is there some thing I should be doing to prevent further leaves from dying. The plant is about 4-5 weeks from germination.
If it is just the small rounded leaves its nothing to worry about. That is a seedlings food. Once those r gone u can start feeding lightly. I forget the proper name for them but no worries it will b ok. Pics would help tho
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a photo please / no blurple light would be favourite
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If you want informed definitive answers, best to fill out a grow questionnaire.
Not enough information and white light pics will help also.
From the info you gave us, Iād guess normal dying off of bottom leaves. Though, depending on your pH, ppm, nutes, etc, it could be any number of things.