The top disadvantages of viburnum are leaf beetle damage, a need for two plants to get berries, and an odd flower scent. You can handle each one with some planning. But know these disadvantages of viburnum before you buy your first plant so you can prepare ahead of time.
Viburnum leaf beetle is the worst of all viburnum problems. Wisconsin Extension calls it a severe threat to arrowwood. I walked out one June morning and found my arrowwood stripped bare of every single leaf. The shock hit hard. Tiny larvae had eaten through the whole canopy in about two weeks flat. Female beetles lay up to 500 eggs per season by carving small holes into twig bark each fall.
Arrowwood viburnum ranks among the species most at risk from this pest. Larvae hatch in spring and chew leaves from the bottom up. A bad outbreak strips a shrub bare two or three years running. After that, even a strong plant may die. My defoliated shrub took two full seasons to recover after I started cutting out egg-laden twigs each winter. That winter pruning made all the difference.
Cross-pollination is a viburnum problem that catches people off guard. NC State Extension says arrowwood needs a different genetic strain to fruit. One shrub alone gives you flowers but zero berries. You need two different cultivars within about 50 feet. In my experience, adding a second cultivar to my yard changed everything. I went from no berries at all to heavy clusters in just one season.
Viburnum Leaf Beetle
- Threat level: Can kill arrowwood viburnum after 2-3 years of heavy leaf loss if left unchecked in your yard.
- Prevention: Check twigs in winter for rows of small egg holes and prune out infested branches before spring hatch.
- Treatment: Hand-pick larvae in late spring or spray targeted insecticidal soap when you first spot feeding damage on leaves.
Cross-Pollination Needed
- Requirement: You must plant at least two different arrowwood viburnums to get any berry set at all.
- Spacing: Keep plants within 50 feet so bees can carry pollen between them during the bloom window.
- Common mistake: Clones from the same parent plant share genetics and won't cross-pollinate each other.
Flower Scent Concerns
- Scent profile: U of Illinois Extension notes arrowwood flowers have a slightly unpleasant smell during bloom.
- Duration: The off scent lasts about 2-3 weeks at peak flowering in late spring before fading away.
- Placement fix: Plant arrowwood at least 10-15 feet from seating areas if scent bothers you or your family.
U of Illinois Extension notes the flower scent issue with arrowwood. The blooms give off a mildly unpleasant smell for about 2-3 weeks during late spring. It won't fill your whole yard, but you'll notice it when sitting close to the plant. Sweet-smelling species like Korean spice viburnum are a stark contrast. That scent gap between viburnum types can surprise first-time growers who expect all viburnums to smell nice.
Each of these viburnum downsides has a clear fix. Prune beetle egg sites in winter before larvae hatch. Plant two or more cultivars so they cross-pollinate. Keep the shrub away from your patio to dodge the flower smell. A few simple steps knock out every major complaint.
I still plant arrowwood viburnum despite every one of these issues. The wildlife value, gorgeous fall color, and tough native roots outweigh the negatives by far. Just go in with open eyes and a solid plan for each drawback. The effort pays back fast once your shrubs hit their stride in year two or three. Birds will flock to the berries each fall. The red-purple foliage looks stunning against green conifers in the background of your yard.
Read the full article: Arrowwood Viburnum: Complete Growing Guide
