First choose a rootstock because this decides how big the tree will grow. Dwarfing trees on Pixy stock are best for smaller areas but if you have an orchard then vigorous St Julien stock will be more appropriate. Damsons are very hardy and can grow well even in the North. Good fertile reasonably drained soil is best. Pruning consists of removing lower branches and shortening long leaders in late Summer.
Although for some there may be no choice when it comes to exactly where to plant your trees, if there are options available some thought as to the trees’ requirements will pay dividends in the long term. No fruit tree really likes to be in the shade so for a start choose the sunniest spot you can. Shelter from prevailing winds is also key; blossoms and developing fruits are prone to spring gales and established trees too can suffer in strong winter winds.