My rowan trees are very lucky. One day when I was coming back from a countryside walk, I noticed something in the gutter near our Natural Burial ground- I went to investigate, and there were several trees, in pots, lying down in gutter. I went back some weeks later and they were still there- fortunately not dead as it had rained heavily. When I went there again in the autumn, they were still there- so I went to get car and trailor and 'adopted/saved' them. Two rowans, 1 oak and 3 silver birch. Two years later, they made the long journey to the Swiss mountains- 1 silver birch has died- but all others are doing really well. No oaks at this altitude- so I protected oak tree during first two winters, both trunk and head- but no protection for past two years- just coming into leaf now, good lad. Those trees are very special to me.