The Copenhagen hawthorn, or Crataegus intricate Lange, is also known as the entangled hawthorn. It is deciduous and is considered to be either a small tree or large shrub (growing from 3 to 10 feet in height), which is used as a specimen tree or shrub border in landscape design. It is very tolerant of wind and pollution and is chosen for urban settings.
Reasons to prune the Copenhagen hawthorn are as follows: to remove any broken branches, to maintain its size within your landscape, to ensure safety (walkways), and to remove suckers or stems from the roots.
Cut away any dead or damaged branches as soon as possible, making sure to make a clean cut so that proper healing can take place. This can be done at any time during the year.
Visually inspect your tree or hedge and decide where you need to prune to maintain the size of your tree or the shape of your hedge within your landscape design. Also check to make sure that branches are not a safety hazard near walkways.
Prune away the undesired branches by locating the branch collar (this is on the underside of the branch where it connects to the trunk) and the branch bark ridge (this is on the topside of the branch where it connects to the trunk). Prune in front of the branch bark ridge and the branch collar. Do not leave a stub, and do not cut into the branch collar or the branch bark ridge, this must be left in tact for the health of the tree. This pruning procedure should be done in the winter or early spring.
Visually inspect for any suckers that may appear during the growing season as they drain the nutrients from the main part of the tree or shrub. Remove these as soon as you notice them -- this can be at any time of the year.