Posted: 09/06/2013 at 13:59
Agree with Dove - get them in the ground (in a nice deep hole, filled with compost) if you can.
They look like Group 2 (early large-flowered) types, so will continue growing after flowering and should have a second flush later in the year. Once the current flowers finish, cut each flower off and they will sprout new sideshoots from just below the flower stem. Group 2 types aren't pruned back much, so they will cover a larger area next year. In early spring, starting from the tip of each stem, work backwards until you see a pair of healthy looking buds and cut the stem just above them.