What is your outside relative humidity? How big is your grow? Do you have single pane, or double pane or better windows?
I only ask because I can't see a non-commercial sized grow doing this. I guess you could put a dehumidifier in the basement with your grow. Do you have standing water near your grow, like buckets of water or watering cans? How moist do you keep the soil? Do you humidify the grow room?
Have you checked your furnace to see if it has a humidifying feature? Perhaps the two together are putting to much humidity in the air.
Before we got new windows, I'd get condensation every year, grow or not.