I planted a Buckeye tree in my yard two and a half years ago when I built my house.  It was only about 7 feet then.  Now it is close to 10 feet tall  Today I found my first dropped Buckeye when mowing.  I have two or three more on the tree.  It will only grow to about 20X20 but is having a bit of Ohio up here in Minnesota makes me happy.  Of course we named it Brutus.