Swim....thinking my friend has a phosphorus deficient setup, but help clarify this inquiry, please. Lower leaves always turn yellow from seedlings on up. Temps are consistently in the mid to lower 70's region...indoor. After week 2 we notice a slight yellowing of the lower leaves then they wilt...
This is subjective, but from experience autos don't need all the ferts that photoperiods need. Plus, if you are going the organic route then all the nutes should be in your soil base on a slow release. Try starting out real low dose to prevent burn. Start a compost collection before next grow so...