I took home a rather sad looking silver birch from alongside a local footpath, it was growing from a slope with the taproot sticking out sideways and the sapling in danger of just falling over and breaking off.
The tree is now about twenty foot tall, having had some of the top trimmed out, with a trunk about a foot across.
There are loads of ash around, they self-seed like weeds, so one or two of those, or last year’s rowan seedlings potted until they get a bit bigger should be ok.
Carefully cutting a new soft growth twig and getting it to root would be worthwhile, I’ve got a hawthorn cutting in a glass of water waiting to be potted to see if I can get it to grow, to fill up a space formerly occupied by a really scraggy elder.
Hopefully, if it takes it’ll fill the space nicely, it won’t spread suckers like blackthorn, it’ll make a nice early display of blossom and berries for the birds in the winter, plus extra cover for birds to possibly nest in.