Robina pseudoacacia 'Umbraculifera'
Very useful tree for poor, dry soil. Fully hardy. Needs a sunny position. Grows in any soil except very waterlogged conditions.
This tree rarely flowers. Pollard the crown in March to maintain shape and keep smaller. Will get to 6m.
As with all woody plants, plant high, exposing as much of the taper at the base of the trunk Content gas possible. Allowing soil to accumulate around the base of a tree can be fatal.