Can I leave the top of my weed tent cracked?

My tent is 2x2 if I leave the top half open will the light affect veg or flowering. The humidity is high an that’s the only way to keep it low.

No exhaust fan? You need active air movement.

If smell is not an issue, getcha an exhaust fan, you can place it outside the tent with a 4” hose running into the tent (on a low port) on the opposite side of the tent put a 2ft piece of 4” exhaust pipe out of a top port, allow ing a ft or more to hang outside the tent angled downward (this should be long enough to not allow light in). You’ll pull outside air in from the top and out of the floor.

This is a very basic setup but all I would bother with given the size of your tent / light.

It won't hurt a thing light wise, I leave my door unzipped until it starts to stink in flower.. Then zip it up and turn on the extraction fan.. Do you have a fan in there?

Yea I have a fan

DadaMink said:

Yea I have a fan

Click to expand...

Something like this would be a good investment. Actively moving air in/out of the tent is pretty helpful for controlling humidity.

This is a super cheap one, but better than nothing.

I use a cheap carbon filter inside and a 4" biscuit fan on the outside of my 2 x 2 x 4 tent.

I use a Inkbird humidity controller to control the humidity where I set it. It works great.

If you're growing autos it shouldn't be a problem with light getting in. But photos I wouldn't do it.

A Fan is most important to Move air around and through the plants, During thick veg minute amounts of stagnant gases build up around and through the thick vegetation and will cause powder mildew and mold during bloom. Be careful and move that Air around. During budding I keep my exhaust running with a fan inside and a small fan at the bottom outside vent pushing air around the pots, besides bugs hate moving air and they love to leach out of freshly watered pots. Flying Gnats, Spider Mites and such.

This is my controls.

I have a 6" oscillating fan inside.

The thing with the display controls my humidity. I have it controlling the exhaust fan.

looks good.