I took will always look for abandoned or neglected plants. Some years ago my wife and a friend visited Heligan and came back with a stick of a plant. It was a very poorly Rhododendron which with nurturing has since become a beautiful bush, currently in bloom with soft pink flowers. We lost the label so emailed them a while back to be told is was quite a rare specimen and that we were lucky to have her.
Two week ago my non-gardening son told me to dug up a tall Rosa glauca from his childr friendly back garden. It's now doing well in ours.