unhealthy

Hi there forum. Trying to find the source of my problems here. I have a few plants from barneys farm in my 1.2m grow tent. some liberty haze, cookies kush and blue cheese. they are about 6 weeks into veg except for 1 which was planted 2 weeks late but I am putting them into flower now as the...

My plant is 3 weeks old from sprouting temp:76 humidity:30 ph is from 6-7 the plant looks extremely healthy and is always attentive to the light. my best guess for the tips browning would be maybe the pot is to big and the soil is staying moist to long or using lemon to ph down, but would...

I thought it was just humidity, but I've been airing out the room for the last 3 days and I'm not seeing change on the new growth. I want to top her soon but I also don't want to cut into an unhealthy plant.. any suggestions?