Yep. Like Mechlasher said, hedge can grow pretty fast if it is growing in good conditions. I've got a small hedge tree that came up by itself about 6 years ago, and it's already got a couple limbs that are over an inch in diameter. The thing that can take hedge a lot of time though, is growing long enough to produce straighter limbs that are long enough. Don't be surprised if you, the kids, AND the grandkids end up reeping the benefits of your seeds. Heck, who knows, could be such a thing that 3 generations or more could get a bow all from the same tree as family heirlooms.
CP