First time grower. Growing some autos outside and they really slow down after the second node shows. They're in 5 gallon pots just below a window. At first I thought I was watering too much so didn't water for a week and no change. Then I thought it was the soil so tried different soil and no change. Now I'm wondering if the issue is glare/reflection from a window damaging the little plants. I've read about that issue with grass lawns and other plants. Thoughts?