I just started flowering and my humidity is right at 50%ish. I kno i need to get it as close to 40 as possible, should i get a dehumidifier or the bucket full of drying crystals. Or if i get a dehumidifier, wuts a good one for a 3.5ftx3.5ftx7ft grow box? Thanks guys

K.I.S.S. I'd try the drying crystals first, it would be one less appliance sucking power.
I saw them at the local dollar store a while back, if you have any near you it would probably save you about 5 bucks. De-humidifiers are a bit more pricy, $75-150 at the start of this winter.

you can buy a stronger exhaust fan or just get another one. also be careful of how much humidity your pushing in the room if its more than 40% then reduce the speed of the fan by covering up some of the intake to the fan pushing air in the room. but i have not tried the crystals, i also think u should give that a try first

50's to mid-50's is actually acceptable RH in my opinion. I have never had a mold or mildew outbreak at or around those levels. In fact, my RH right now is 56%... No mold, mildew or bud-rot. The more important aspect here is the difference between night-time humidity and day-time humidity. If your RH percentage stays pretty consistent and does not jump around but a couple points, you should be fine. I have seen other grows however where the day-time RH was kept at 50-55ish, then it swung to almost 70-72% with lights off! This is what you don't want, and letting the plants be subjected to such a high differential is what causes mold/mildew outbreaks.
Just keep an eye on the difference between your lights on and lights off humidity levels. It is best to check the lights off humidity at least 8 hours into the dark cycle as it will give an accurate assessment of what is happening through the night.
Don't begin to freak out and treat a problem before you know it is a problem for sure... It will save you money in the long run.

Peace, E1

In dark time the lowest ive seen it is 46% and highest with light on is 54%. So its not jumping too bad, i wanted to stabilized it in the 45-50 range but ill keep an eye on it incase. And my temp goes from 73 at night to 80 with the lights on, so i think with both light and rh im within acceptable means, just gotta monitor like a hawk.

Yep, you'll be fine! Just monitor for swings.
You can also do a preventative foliar treatment with organocide during weeks 1-2 of 12/12 ONLY before the buds start forming. As soon as you see buds forming and not just a barrage of pistils, stop foliar treatment. I treat my clones right before I get ready to place them into their medium(coco, rockwool etc.). I find that preventative treatment is your best defense especially with powdery mildew. Once you have a powdery mildew outbreak, you'll just be fighting it back. It never really dies completely because it is a systemic disease. It just goes dormant for a while and when your plant's tissues have the right PH for spores to germinate, you get another outbreak.

With the organocide, I use 10mL/Liter of warm water. Shake it vigorously between spraying because the oils will separate from the water. All my clones receive a preventative treatment of organocide, never had a PM outbreak since! If you ever get PM real bad on small clones or vegging plants, you can make a SAFER(brand) sulfur solution in a 5 gal bucket and dunk the clones/plants in for around 30 seconds. The sulfur will coat the entire surface of the plant changing the PH to make it inhospitable for mildew!

Peace, E1

ok here is an update on some of the main colas, im pretty sure i got fems!!!!!!




plant on left





thats a hard stick on the right to show size reference

as u can see i still have alot of vertical space in the box, but im still a lil nervous cuz they seem to be growing an inch a day still once i when to 12/12

monsters in the grow box, may we all have such problems

yard stick**

Coming along nicely, keep it up.