Posted: 11/05/2012 at 00:52
I am planning a similar border of trees to line a formal lawn. As most trees grow much larger than 3m X 2m, I have decided that the acers may be the best option on my acid soil as they have so much colour intrest all year round. You could go for any fruiting tree on dwarf root stock and the blossom is great for 2-3 weeks. But I'm tempted by the prehistoric 'stag's horn sumach' for it's fantastic autumn colour and unusual flowers/fruit. Best of luck!