I read somewhere that "gas filled" windows block a measure of natural light, so maybe that is my culprit. Weather has been too up and down to get them outside yet. We were in the 30s last night.
The way the plants are all leaned over and stretching out for the light makes me think they need more light. The low E glass could be the culprit. My little seedlings were actually dying on me until I got some grow lights. BigBonner said my low E windows were probably the cause. He said not even house plants do well in front of them. Artificial light made all the difference in the world for mine. I bought the cheap two ft. undercabinet fluorescents from Walmart and Lowe's. I think Lowe's was cheaper. About $10.00 each. I bought grow bulbs for some, and the others I'm just using the bulb that came in them. So far, I can't tell much difference between bulbs.