My clematis has bloomed. My question is should I dead head. Will it bloom again this season?
You should first of all find out the name of the clematis and then which pruning group it belongs to. There are three, and it is important that you treat the plant according to the group it falls in to. Some plants which flower early - say before June - can be trimmed back and with luck you may get a second late summer flowering. Find the pruning group before you do anything else.