I collected this hawthorn from farmland about 17 years ago. Its been in a pot all of that time but never produced any flowers. In recent years, its been subjected to a lot of work, a number of re-pots and several transformations to get it down to the size it is now.
About 6 years ago, before it was chopped back to its current height, I took a hardwood cutting from this tree and placed it in a pot to root. It rooted quickly and was placed in the pot you see in the next picture about 5 years ago. I have done very little to it since. It is pot bound and has never been re-potted. It is rarely fertilised and gets no winter protection in my greenhouse. The following picture was taken this week and shows the result of this neglect.
If there is a lesson I can learn from this that will encourage my other shohin hawthorns to flower, it is this. I will delay any future re-potting to ensure the roots are truly filling the pot to their maximum extent. I will reduce fertilising to the minimum necessary to maintain the health of the tree and I will only provide winter protection if freezing conditions become unusually prolonged and there is a danger of loosing the tree.