The other two I put in pots because I wanted to create a Laburnum Arch, sometime and somewhere in the garden but hadn't decided where. They have lived in those pots ever since, pruned and staked to produce one leader. Because they have been in pots they are only half the size of the two that were planted out.
This year, as the garden grows organically, I found the perfect spot. We found a metal arch the right size, it needed to be large! It arrived a couple of days ago and HEY PRESTO! I love it. It finishes off this area of the garden. All I need now are the steps to be built. But one step at a time!