ADHD2THCanswered grow question 4 years ago Put a small hygrometer directly in the foliage if you can to get a "surface reading." Get a box fan if you have one, or something with decent push to it, and aim it directly at your plants, this will help with humidity and moisture reduction. Make sure you have a decent exhaust system. If you can decrease the size of your grow area, do so. The less you have to worry about dehumidifying, the better.