How To Use Progressive Web App aka PWA On 420 Magazine Forum
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Your question doesnt provide enough imformation for us to give you and exact answer...
Theres several ways to grow cannabis. Soil, Hydroponics, Aeroponics.....Theres different lighs you can use..Floros, HID...
Please follow the link that Boss provided you and read through the OverGrow FAQs...You will find an answer to ALL of your questions there.