Yea wind is actually NEEDED to circulate the air around the plants to make sure they have fresh CO2. Plus the stem rocking back n forth in the wind creates micro tears in the stem and when they heal they heal stronger then they were (like a broken knuckle on boxers.) But a lot of people say that you're supposed to keep the fan on 24/7 but I think that the plants need to take the time to actually heal so I just have my fan plugged into the timer along with the lights. And I also water them at their "night" because when it rains in nature there usually isn't very much sunlight is there? Plus at night the ground gets pretty wet.