Sumner is a great tree. I have 68 acres of those myself. This tree has the ability to fill out nuts even on the inner shaded branches. However it is becoming more susceptible to scab. And black aphids love it. It is a good producer. It will alternate bare but this is easily controlled by shaking off the excess in late summer at 1/2 to 3/4 elongation. We average 1750 lb per acre on sumners.