The top disadvantages of viburnum come in three forms. You face pest damage, tricky pollination needs, and suckering. You get real beauty from these shrubs in your yard. But you also get headaches you need to know about before you add one to your garden.
In my experience, the worst viburnum problems start with a tiny insect called the viburnum leaf beetle. I watched this pest wreck an arrowwood viburnum in a client's garden up in Connecticut. The larvae hatched in early May and chewed leaves from below. Within three weeks, every leaf looked like lace with only veins left. That shrub lost all its leaves twice in one summer. It never came back to full health after that beating.
Cornell University research shows why this beetle hits our native shrubs so hard. European viburnums evolved a twig defense that crushes beetle eggs in the bark. Our native types like arrowwood never built this defense. The beetle wasn't part of their world until it arrived from overseas. Cornell ranks arrowwood among the most at-risk species. Heavy feeding kills a mature plant in just two to three seasons of repeat attacks. This is one of the most serious viburnum problems you can face in the Northeast and upper Midwest.
Pollination is the second big headache you'll face. Most viburnums need a second plant nearby to set any fruit at all. You can't just plant one and expect berries. Snowball viburnum 'Roseum' won't fruit because it's sterile. Even fertile types need a partner within 50 feet (15 meters). That means you need to buy two plants just to get the berry show you wanted from your garden.
Suckering rounds out the top three complaints you'll hear about viburnums. Several species send shoots from their roots that pop up far from the main plant. European cranberrybush spread so fast it turned invasive in the upper Midwest. You can spend hours each spring cutting back stems in your lawn or garden beds. When I first grew one, I had no idea how far those suckers would reach into my yard.
Other viburnum cons add to your workload too. Some species get powdery mildew in humid summers that coats your leaves in white fuzz. Others suffer leaf spot that creates dark blotches across the foliage. A few types grow so large they outgrow your space within five to seven years. You need to check the mature size before you buy. These smaller issues won't ruin your plant but they add to the care you'll need to keep it looking good.
When I tested different species side by side, resistant types like Korean spice and doublefile came through clean. Their leaves stayed whole while arrowwood got shredded by beetles in the same yard. That test showed me that species choice fixes most viburnum cons before they even start. You pick the right plant and half your problems go away on their own.
Here is my best advice for you to dodge these drawbacks. Choose Korean spice or doublefile viburnum if you live where the leaf beetle is active. Both rank high on Cornell's resistance list. Buy your plants from different nursery stock so you get proper pollination. Pick clump-forming types that won't send suckers into your lawn or flower beds.
Know the disadvantages of viburnum, pick the right species, and plan for two plants from the start. You'll avoid the worst surprises and still enjoy the flowers, fruit, and fall color that make viburnums worth your time. Your garden will thank you for doing the homework up front instead of learning these lessons the hard way like so many of us did.
Read the full article: Best Viburnum Shrubs for Every Garden
