Blue Muffin? is a useful viburnum variety. More compact than other Arrowwood viburnum, it fits easily into the residential landscape. Clean white flowers make for a crisp contrast with the glossy green leaves in early to mid-summer. The remarkably intense blue fruit that inspired the Blue Muffin? name appear in late summer and fall. The fruit add interest to the fall landscape, and attract songbirds to the garden. Berries are not edible. USDA Zone 3-8 Good to grow 7 Change Light Needs Full sun, Partial sun Water Needs Water regularly in extreme heat for best performance. Requires less water once established.