Leaves Are Browning

[Bombard]

Hi all. My plants leave tips are just starting to brown and curl. I am growing in soil, watering with rain water and the lighting is 600 watts LED. The only change is I changed the lighting from 24 hours of light to 20 hours of light. The temp does drop from 72 degrees to 64 degrees. Would the temperature drop cause this?

 

[CaliRooted]

Keep your PH in check

 

[MissBotany]

Keep your PH in check

I agree. Rain water is naturally acidic.

 

[Bombard]

Keep your PH in check

Thanks I will.

 

[Bombard]

I agree. Rain water is naturally acidic.

Thanks MissBotany. I just checked the water and in fact the ph was high