Posted: 07/06/2017 at 09:28
You've probably heard about avoiding 'root rock' .......... this is because in the winter if the roots move around in the soil air pockets are created which fill up with water and then freeze solid and this can damage the roots of some plants. This is why we cut buddleja half-way back in the autumn so it doesn't catch the winter winds so much.
However, hawthorns are tough as old boots ... they cope in the worst winds and survive ... some even develop wonderful sculptural forms after years and years in the teeth of wind coming from one direction
Don't worry, yours won't end up like that
Just do as has been suggested by the others above and it'll be fine.
Congratulations on your choice of a wonderful wildlife friendly native tree ...