A question from a fellow grower:
just need some advise on his current 1st grow attempt.
Closet size is, (1meter wide, 600mm deep and 1.7meter tall). Grow medium is Peat moss mixed with vermiculite and perlite. Nutrients are Bio-grow 1ml per liter + Bio-bloom 2.5ml per liter at the start of week-5 of bloom.
Plants are 2 UK cheese from clone and 1 Jack Harer from seed, in 11 liter pots and under scrog with a 250w HPS. 1 small fan under scrog pointing up toward light and 1 exhuast fan 100mm diameter with rating of 2.12m squared per minute. (roughly 2 times air exchange per minute.) Light is about 30cm from tops.
Plants are in 5th week flower and buds look like they are just starting to fill out on the cheese but still stretching slightly on the Jack.
Its winter here so temps during daytime (lights off) is roughly 10-15 degrees celcius with up to 90% RH (inside closet and out in room) and night time, (lights on) 22 - 24 degrees celcius with around 47% RH.
Humidity during lights off is extremely high even going over 90% but swim added 2 passive de-humidifying tubs bought from a hardware store that uses calcium chloride to extract moisture. These work a bit but RH stills get up 80% on cold rainy days when lights are out and temps drop to around 10 degrees Celsius. All fans are off during light off period because swim doesn’t want the cold air from the room to be brought into the closet and cause even more RH.
So question is…should he try running the fans during lights off period or would the colder air shock the plant? OR is it okay to have such a high humidity during lights off since the temp is so low (could mould still grow in these cold temps with high RH). Swim has grown mushrooms before and know that mould grows in high temp + high humidity but is unsure whether it would still grow in low temp with high humidity.
There is no extra cash to put into the grow and will upgrade the extraction fan, side lighting and also add a dehumidifier during the 2nd and further grows, but for now swim can only run fans and maybe put some more passive de-humidifiers in the closet to try and remedy the high RH BUT swim is unsure whether it would be necessary and needs advise.
BTW: the Jack Harer was grown from a feminized seeds from ILG and in 5th week flower it has a extremely potent lemon smell when touched or gently rubbed, - is this normal for a JH strain?