I usually plant out around mid May if the 10 or 15 day forecast looks safe. I'm hoping that at least a few trays can start living on the front porch soon. I'll bring them in for overnight cold weather. Their pots are now too small and they're big enough to not fit on the light shelves any more. Window light in my house is poor. It would be a shame to loose them now after babying them all winter.
Within a few weeks I'll probably plant my two Bloommaster pots too, and that will thin out what's on the light shelves. Those take a lot of little plants. Once planted they could be on the porch for day time and sleep in the garage overnight.
Karen