I collected a nice little apple tree with a 2.5 inch trunk and approximately 2 ft tall that our cows have kept pruned low for years. Was collected as it was budding and it did real well till a late frost (minnesota). Some of the foilage didn't do so well and the leaves seem to be stunted but the tree is definitely still alive and I'm sure will be fine next year. I wanted to prune back some longer thick branches this fall but am worried that might stress it out too much. Thoughts? I'm thinking I should just wait but it's going to be hard to get into my greenhouse this winter without some pruning.