I am quoting a job that is a 1/4 circle in the corner of a backyard against a stockade fence. It is about 10-12' out with a curved front. The customer wants to cover a manhole that is about 2.5-3' diameter and about 8" high. about dead center of the proposed bed. THe customer requested that bushes/ hedges be planted to cover manhole then some annuals planted to border the bed. It is located in Oklahoma and it is going to be full sun mostly afternoon sun, but if planted close to the fence would help shade some. Was thinking nandina with some sort of yellow bush in front to contrast, any suggestions???