It’s the season for getting bare-rooted trees into the ground, so last weekend I bought a chestnut tree for the farm. I was getting ready to plant it out when I saw on the back of the tag that it grows to 10m high and 10m wide. The spot beside my cattle yards would only accommodate a 5m diameter tree, and I certainly didn’t want a large overhanging branch to drop its spiny chestnut burrs into the yards, damaging the hooves of my cattle.