Despite its many thorns, hawthorn is very bonsai friendly. Hawthorn, or Crataegus, is a great subject for bonsai. Easy growing and very forgiving when mistakes are made. It will send out multiple new shoots, giving you plenty of opportunity to grow new branches. The abrupt change in the direction of growth, the characteristic bark and its small leaves make it a most suitable variety to work with. Read the article: https://bonsaitoday.com/articles/basics/step-by-step/clip-and-grow-step-by-step-hawthorn-crataegus/