The p[lants won't die from low humidity. But it has been pretty conclusively shown that they veg best around 80 degrees and more like 60% humidity. If you have a target size for flowering, you might be better off to add humidity if that gets you to the growth target a week or more early.
Plants wont die, but they will struggle if your temps are 80+ and the humidity is 30% - espesh when they are young. Tbh, low humidity is so easily fixed it's worth doing so - just buy a cheap humidifier for like 15 bucks and hang some wet towels in your grow room and you'll be at 60%+ no problemo
i used 1 scoop ov miracle grow per gallon and a half.. comes in at 6.4 p.h....
wat temprature should i keep it at?,
closet is at 80 degrees with lights on..
is humidity important in vege stage??