What kind do you have -- American or Oriental? One is a native, and the other is an aggresive and invasive alien that is displacing the native. The American is becoming rare and the Oriental, while beautiful, is taking over. I had it on a fence and it climbed onto everything within it's reach, including getting high up into a maple, smothering branches and generally trying choke things out. If you have Oriental bittersweet, it may not be legal to grow it in your state; check with your state's DNR and their invasive plant list (should be on the web). You definitely don't want to plant Oriental bittersweet near a wooded area. I love the berries but it's a real problem plant.