There is a tree in our neighborhood that looks like it was chopped to get out of the way and then started growing again. I was thinking of collecting it and placing into a pot. Since it is winter now, I was considering doing this sometime in the spring. My thoughts are to collect it with a wide base (6 inch soil diameter and 1 foot deep) and place into a large training pot (18") with bonsai soil. It looks like something within the pyracantha genus. There are similar shrubs nearby that look similar and have red berries with spines on the branches. Any suggestions or tips?