From a seedling into young plant

They’re growing up fast and becoming very promising young plants compared to what they were three and a half weeks ago.:) A little observation of mine: the egg carton plants (left) are developing at much slower rate than the plants I planted in aluminum baking trays (right). Total mystery to me, since I planted them at the same time and with the same type of soil. But I think it will work to our advantage – some tomatoes will be giving us fruits at a later date.
Can't you just hear how the bigger plants are screaming at me for deeper containers?
Re-potting this weekend is a MUST!