An oscillating fan is a very important part of growing marijuana. It helps distribute air within the grow area, preventing hot spots. Having a fan on will also stress the plants a bit, causing them to grow more and stronger roots. I set the fan in the grow tent on low speed and have it oscillate the entire time that the grow lights are on.
- Fan size should be proportionate with grow tent/room size
- Multiple fans may be necessary for a large grow
- Don’t stress your plants too much, low speed only