As far as what kind of chokecherry, the nursery guy said it was a Canadian chokecherry, so I don't have any more detail.
Yes, we've seen pictures online of chokecherries that have been allowed to sucker. We are open to letting it sucker and become more bushy if it keeps the tree alive. It was my understanding that by letting it sucker, the tree's energy goes to producing suckers rather than top growth, leaves, etc.?
The other issue is the dead branches at the bottom of the tree. I've attached a pic of the branches. I should saw any dead branches off?
<a href="http://www.flickr.com/photos/71126519@N00/3476869620/" title="000_0726 by gbig2, on Flickr"><img src="http://farm4.static.flickr.com/3588/3476869620_618c25321f_o.jpg" width="1200" height="900" alt="000_0726" /></a>
Here are more pics after I dug deeper:
<a href="http://www.flickr.com/photos/71126519@N00/3476866576/" title="000_0718 by gbig2, on Flickr"><img src="http://farm4.static.flickr.com/3660/3476866576_a53b64cb9e_o.jpg" width="1200" height="900" alt="000_0718" /></a>
<a href="http://www.flickr.com/photos/71126519@N00/3476866980/" title="000_0719 by gbig2, on Flickr"><img src="http://farm4.static.flickr.com/3323/3476866980_8d6ec677e3_o.jpg" width="1200" height="900" alt="000_0719" /></a>
<a href="http://www.flickr.com/photos/71126519@N00/3476058733/" title="000_0721 by gbig2, on Flickr"><img src="http://farm4.static.flickr.com/3297/3476058733_055cb58338_o.jpg" width="900" height="1200" alt="000_0721" /></a>
<a href="http://www.flickr.com/photos/71126519@N00/3476059475/" title="000_0723 by gbig2, on Flickr"><img src="http://farm4.static.flickr.com/3400/3476059475_cab8b93b64_o.jpg" width="900" height="1200" alt="000_0723" /></a>
<a href="http://www.flickr.com/photos/71126519@N00/3476868940/" title="000_0724 by gbig2, on Flickr"><img src="http://farm4.static.flickr.com/3650/3476868940_794ee57fae_o.jpg" width="1200" height="900" alt="000_0724" /></a>
And here's a video if it helps. I did my best to keep the camera steady.
http://www.youtube.com/watch?v=eN2oxi2qFs0
Hopefully that's deep enough because getting that deep almost killed my back.