Looking great decent growth rate at 7 days won't be long before you need to transplant. How are you growing ? Lights? Good luck and welshpony is right start a journal
Lovely! Be sure to keep your lights as close as possible without burning them, to reduce the amount of stretch, as seedlings like to do. When you transplant, you can set them lower (or lay the stem on its side under the soil) and bury any excess stem.