Incorporate approximately 3 inches of organic matter, such as compost, into the top 6 to 8 inches of soil where you plan to transplant the clematis seedlings.
Dig a hole that is 2 inches wider than the pot the clematis are growing in, but just as deep.
Take the clematis seedlings out their pots; keep the soil around the roots.
Plant clematis seedlings about 3 to 4 feet apart. Note, though, that spacing differs among varieties.
Water them well and add 2 inches of mulch, such as bark mulch, to keep the roots cool-- a must for clematis.