The Alleghany viburnum (Viburnum rhytidophylloides Alleghany) is an upright evergreen to semi-evergreen shrub with dense foliage and a rounded shape. Alleghany viburnums bloom during spring with large clusters of white, fragrant flowers. This shrub grows rapidly to 10 feet tall and wide, making it an excellent shrub for creating privacy screens, hedges and windbreaks. The Alleghany viburnum also produces red ornamental, berry-like fruits that emerge reddish in color and turn to black. Alleghany viburnums are low-maintenance shrubs that provide year-round interest and beauty. This shrub grows best in USDA hardiness zones 5 through 8, where winter temperatures rarely dip down to minus 15 degrees Fahrenheit.
Water your Alleghany viburnum deeply to soak the soil down to and around the roots once each week during summer when rainfall is less than 1 inch. During the first year after planting the viburnum, water once each week to thoroughly soak the soil regardless of rainfall.
Spread a 1-inch-thick layer of organic compost on the ground around the Alleghany viburnum each year in early spring, spreading the compost to cover the entire canopy area. Instead of compost, you can apply an all-purpose tree and shrub fertilizer before new growth emerges in spring, following the dosage instructions on the label.
Spread a 2-inch-deep layer of mulch on the ground around the Alleghany viburnum to control weeds and preserve soil moisture. Add fresh mulch each spring to maintain the layer’s thickness and extend the mulch over the entire root area.
Prune away all damaged, dead or diseased branches throughout the year. Cut these branches back to the crotch at the main trunk, and avoid removing more than one-third of the Alleghany viburnum’s canopy in a single season.
Prune to shape your Alleghany viburnum each year immediately after the bush finishes flowering. You can shear the shrub to shape it or perform selective pruning and trimming of individual branches.