Pleaching means to remove all the branches from a certain height down, usually on a hedge, baring the trunk of the plants. We do this to neaten the foliage, create airflow and to make room for underplanting. It creates a wonderfully classic look, basically an elevated hedge on clear, strong trunks.
Pleaching works especially well with certain plants. Check out our article on the Top 10 Best Plants for Pleaching.