Viburnum
Viburnum
Viburnum blooms from April through May.
Mature size, hardiness zones, sun and the trait tags were checked against named botanical sources for this plant. The bloom months and water need on this page were not.
Growing Viburnum
Plant it in full sun. It prefers moderate water. It is hardy in USDA zones 3–8. Expect it to reach about 6.6 ft tall and 6.6 ft wide at maturity, in roughly 4 years.
When to plant Viburnum
Plant Viburnum in early spring as soon as the soil is workable, or in early fall at least six weeks before your first frost, so roots establish in cool weather. For the middle of its hardy zones 3 to 8 range, spring means April to June and fall means August or September. Once settled, it blooms from April to May.
Month-by-month timing for your zone is on the planting calendar: for the middle of its range, start with zone 5 in April.
Comes in 6 varieties
Same plant, same care - pick the variety you are growing.
Good to know about Viburnum
Curated from university extensions, botanic gardens and other primary sources, with the source named on every note.
Worth knowing
For a heavy berry crop most viburnums need a second, genetically different viburnum blooming nearby: a lone plant or two identical clones fruits poorly. per NC State and Clemson
Eating the berries
Sweeter species like blackhaw are pleasant raw, but the cranberrybush types (V. opulus) are bitter and astringent raw and are better cooked or juiced into jam. per NC State and PubMed Central
Watch for viburnum leaf beetle
Larvae skeletonize leaves in spring and adults chew holes in summer; heavy repeat infestations fully defoliate and can kill the shrub. per Wisconsin and University of Maryland
Some species resist the beetle
The beetle hits arrowwood and cranberrybush hardest but largely spares Koreanspice, doublefile, leatherleaf and dawn viburnum, so species choice is your first defense. per Wisconsin and University of Maryland
Prune right after flowering
Viburnums bloom on old wood, so shape them right after flowering; a dormant or spring cut removes next year's flowers and the berry crop. per Clemson
A huge, varied genus
More than 150 species range from 0.6 to 9 m, deciduous or evergreen, USDA zone 2 to 10, so choose by species, not just the word viburnum. per Clemson
What pairs well with Viburnum
Good companions share its growing conditions and add something it lacks: an earlier or later bloom, a lower carpet in front, or structure through winter.
Aster
Shares full sun and moderate water; blooms in early fall, extending the bed's season; both offer pollinator forage, in different months; its seed heads stand through winter, for structure and the birds.
Black-Eyed Susan
Shares full sun and low to moderate water; blooms in midsummer, extending the bed's season; both offer pollinator forage, in different months; its seed heads stand through winter, for structure and the birds.
Purple Coneflower
Shares full sun and low to moderate water; blooms in midsummer, extending the bed's season; both offer pollinator forage, in different months; its seed heads stand through winter, for structure and the birds.
Lavender
Shares full sun and low to moderate water; blooms in early summer as this one finishes; both offer pollinator forage, in different months; evergreen, so the bed keeps its shape through winter.
Trumpet Vine
Shares full sun and moderate water; blooms in early summer as this one finishes; both offer pollinator forage, in different months; climbs to 26 ft behind it, height without the footprint.
Lobelia
Takes full sun to part sun and moderate water; overlaps, then carries the display into early fall; low at 8 in, to carpet the ground beneath; both offer pollinator forage.
Calibrachoa
Shares full sun and moderate water; overlaps, then carries the display into mid fall; low at 8 in, to carpet the ground beneath; a soft color beside the white.
Fan Flower
Shares full sun and moderate water; overlaps, then carries the display into mid fall; low at 8 in, to carpet the ground beneath; a soft color beside the white.
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