I grow David Barber in my "hell strip" between the street and sidewalk, by my mailbox. It survives tip hardy in my zone 5 Nebraska garden, and is totally no care for me. I don't spray, and the foliage stays clean. My three-year-old plant has put out very long but low arms of blooms in every direction, and I prune it back hard after blooming to keep it in bounds. It has very large clusters of thick white blooms, some of which die off early needing some micro-pruning or "crunching" of the dead flowers to keep the remaining cluster looking nice. Like all my Tantau roses, it's tough and vigorous, and repeats well in a full sun situation. It stays low, so it's appropriate to a mailbox garden, with the arms and clusters never getting above about 2 feet. The arms stretch at least 3-4 feet in each direction if I let them, making a wide base for the plant.

Highly recommended for an easy care hardy groundcover rose in a tough situation
Nippstress