I bought a "hardy silk tree" from a catalog store this spring and it is growing, but I'm not sure what the bark of this tree should look like. For instance, at first I thought it had scale, but now I'm not so sure. This might be something that is normal for this tree. We live in the north midwest, so there are not any of these trees around that I know of. The "scale" I'm talking about are white bumps, but I did see these same 'bumps' on a hawthorne tree at a nursery not long ago. Any help here would be wonderful. Thank you.
Hardy Silk Tree
Certified GKH Gardening Expert
Well, it certainly sounds like scale to me. This article should help with treating it: https://www.gardeningknowhow.com/plant-problems/pests/scale-bug-how-to-control-plant-scale.htm
We have found neem oil to be effective against these pests. Here is more information: https://www.gardeningknowhow.com/problems/pests/neem-oil-uses.htm