If you massed your plantings in one large container, I found this cool tool at Gardener’s Supply Company that I think would work especially well for separating the individual plants for transplanting into their new outdoor homes.
The serrated edges allow you to easily cut through roots and the wide, curved, spoon-shaped scoop makes easy work of moving seedlings into their new individual homes.
Your seedlings have been transplanted into single pots for the last few weeks and have been hardened off slowly. Now you are ready to set them out into the garden. Handle them carefully being gentle with the tiny leaves and the stems. Tomatoes can be planted down as far as the first set of leaves. Firm the soil around and water with a transplanting solution if you wish. Little seedlings grow well when the temperatures are not too hot. Because it has been such a cool spring, however, you may need to provide protection. You can use good old-fashioned tomato cages wrapped with plastic for any seedlings until the weather warms, or you can check out some high-tech gardening accessories like Red Tomato Teepees or Kozy Coats.
I’ve always liked the looks of those Victorian cloches and even have a couple for fun, but they’re not very practical for a real garden. Long ago, we used old clay tiles - they protected seedlings from the wind and absorbed heat to warm them as well. They are a little hard to find nowadays.