Growing in Uk

18/6 the best i prefer normal led not purple light try mars hydro ghe the bes just put like they write on back sticker temp u neeed 23-26 and humidity 40-60%

Hey there @ukraineGrow C02 is fantastic for gardens without the ventilation! You are able to maintain a higher PPM without as much cost. The drawback of course is having no ventilation to help with the regulation of the humidity and temperatures. However according to your diary the temperatures are at 82F which is actually perfectly fine with added C02 due to the increased ability for the leafs stomata to exchange gases with the air. Its recommended to keep the C02 PPM between 1200 and 2000 and NEVER over 3000 as it can become bad for humans and lethal around 5k. Also the GH series is best given at 1/4 of advertised strength depending on strain. Happy growing my friend 😎

So many questions, and to me one answer... look for a good growing book ( there are plenty) or a nice helping site in the internet. onl about using co2 you can write for minutes... Happy growing and you got an PM