Hey theo b , basically you want to start reducing the any nutes with N in it right about now, they've clearly had enough and won't need as much starting next week as it is . temp wise any cannabis plant likes highs max around 26 lows at 16°C and humidity progressively lower so that in four weeks' time you're around 35-40% and green crack is no different, you can get really buff plants but depends on the light, so far she's taking nutes like a champ, so congrats on that ! hope this answers you question bro 🚀