I know this is an old post but still comes up on search engine so thought I would add for someone.may help.I grow in winter in MI.Temp in tent 70 degrees-75 degrees @ night 63 degrees, humidity 25%-32% absolutely no stunted growth at all,nor any problems.Just understand a little more water needed. no reason to go crazy.Using organic soil 60% fox farm to 40% sohum never get nutrient burn because of more water intake through roots,works great in late flowering and brings out strain traits for Kush really well.All things will never be equal for comparing one style of grow to another.If everything else I do is based on what I read when growing at 70% humidity then it will not turn out well but if everything else I do is based on growing in 30% humidity them my results will be just fine and so will yours.plants are grown all over the world in different climates.There is no only one climate for good results.Know your strain.There are so many misleading things stated when blanket statements are made.Like the Marines say adapt and overcome.Oh by the way forearm size tops in 30% humility,please don't tell me it will not work.No bug problems and no mold problems.Not for everyone. I know, but for me just fine.