Japanese Maple - should I prune a second leader?
Hi! I planted this Japanese maple in my front yard about 3 years ago. It is starting to develop a second leader as shown in the picture below, which is about 1/3 of the plant now. I never pruned it because it was really struggling to get established at first. Now it is healthy and getting very bushy and I think it needs pruning. My question is - should I cut off the second leader? I do not know what variety it is, so I also included a close up of the leaf. I am hoping someone here can help me identify it and can help me figure out what type of growth habit to expect from it. Also, it is located about 4 or 5 feet away from a concrete retaining wall - do you think this will be problematic? Will the roots damage the retaining wall when the tree is larger? Thank you in advance for your help - I am new to caring for Japanese Maples, and I want to learn about and take good care of my tree so it grows to be healthy and beautiful :D