Any tips on planting yellow/river birch? From what I've read it is recommended to plant them in moist, open fields. That fits my backyard pretty well. I guess they have an aggressive rooting structure so keep it away from the house, well, septic, etc.
Most of the potted trees I see come with the desired clumps of 3 already, but I've seen some here and there with a single trunk. Do the singles tend to grow larger and healthier than the clumped versions?