I know what you mean. The only thing keeping me from starting them waaaay to early is to keep repeating to myself: "aphids. aphids. aphids. aphids."
Dash-That's one of my worries too. Had a bunch of babies get covered inside last year. Don't know how the little bastiges get inside tho.
Dash: aphids are like bloody mary or beatlejuice, you say their name three times and they come out to play. Just sayin