Burr oak are a tree that can bear acorns at a fairly young age but grow pretty slow. Reds and Whites grow at least twice as fast (dia and height) but just about all my burrs had acorns before 10 years. One started at year six, when it was most stunted of ones planted around same time and has stayed that way over the last dozen or so years.
I like em because they can give acorns quick without even being hybrids. A challenge if you have bears however. Being a smaller tree and having acorns is not a good combo if bears take a liking to them and don't want to wait until they drop. They will take a 3" dia tree and just push it over and looks like the St Louis Arch. It's an oak, so tuff stuff and does not bust off, but will have to be corrected with multiple stakes.
In full sun and decent rain first couple years would say between 80-90% if tubed. I swear the first two years looks like they practically grow nothing while I have had a few vigorous red oak jump out of 5 ft tube the first summer.
