The 2' height of the wall is fine for preventng rhizomes from going under the wall into your lawn, but there are other concerns. If the wall is made of mortared stone, rather than reinforced concrete, the bamboo may eventually crack and break the wall. Another concern is how close to your house it is. Most bamboo leans out at least some, so if there is a pathway beteen the bamboo and the house you might not have enough room to get through. Also, you don't say how big the crabapple is now, but you might want to have that be a focal point and not have any bamboo of similar height near it. If it's 28' from the tree to the end of the wall, you could probably have room for a clump or two of bamboo near the end of the wall. There are many varieties, but you will be limited by your zone 5. You might want to browse through the species list at the ABS website.

Here is a link that might be useful: ABS website

Sorry for the left-out info. It is a dwarf coralburst crabapple that is 3 inches diameter at the base (approx. 7 feet wide and 9 feet tall). I do want this to be a focal point, but not sure what else to put along the rest of the house length. I figured a clump of bamboo would look nice. It is an ordinary landscacping wall--4 inch high by 12 inch wide x 8 inch deep stones. It's not mortared or reinforced by any means. Each stone has a lip on the back where the weight of the stone ontop and the pressure from the soil behind keep it in place. I guess you can say it's porous. There is no walkway between the house and the wall. It simply grass, then 2 feet vertical of wall (stacked stones), then 4 feet horizontally of soil, then the foundation/siding. The bamboo would go within the 4 feet of soil. Would this work? Any type that you would recommend?

I would reccommend one of the many fargesias unless you plan on digging and splitting every 5-7 years. Runners will fill that little space in no time and let me tell you digging bamboo is not for the faint of heart. It is extremely hard to dig out. I have dug 10 groves so far and I would much rather dig a clumper than a runner. But If you don't mind the hard work I think runners look better. A good runner for your zone would be phyllostachys aureasulcata or yellow groove, or phyllostachys bisetti, or P. nuda, or p. atrovaginata or p. rubromarginata. In clumpers I would go with fargesia rufa, or fargesia scabrida. It just depends on what look you are going for and the amount of work you are willing to put into it. I also think that once your running bamboo runs out of growing area that it might travel deep enough to escape your wall especially if the dirt inside the wall is loose enough for the rhizomes to travel easily. In loose soil runners have been known to travel deeper than normal. I hope this helps.

Just be aware that, even with the hardiest bamboo, you are probably going to get substantial plant damage in the winter in your Zone. This would include foliage/culm loss, and -- in severe winters -- loss of the entire plant. For example, below is a link to a photo of Ph. nuda, one of the hardiest runners, exposed to winter temperatures of -12F.

Here is a link that might be useful: Ph. nuda in winter