I would be surprised if your plum is “Burbank” because Asian plums are rarely if ever sold on their own roots (it’s just a very inconvenient way to propagate them). Based on the fact that your tree is a seedling that tends to sucker and based on your location in Georgia, I would suspect that it is a particularly good selection of Chickasaw plum (Prunus angustifolia). For example, check this thread about improved Chickasaw plums that were handed down through family lines in Southeastern states. Chickasaw plums are characterized by their narrow leaves (this is what “angustifolia” means; see leaf photos in the aforementioned thread). It is also mentioned that most plums, except Chickasaws, rarely survive for many years in places like Georgia.
3 Likes