How to Plant, Grow, and Care for Viburnum
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As viburnum blooms on old wood, pruning should be undertaken only after the bloom period. Broken, dead, or diseased branches should be removed as soon as you notice them. Tree forms of this plant may require some pruning to achieve the desired shape. You can propagate viburnum from softwood or hardwood cuttings. Growing viburnum from seed can be done, but it's a laborious process. Most experts suggest propagating from cuttings instead. Carefully choose your cultivar for planting in pots; some types of viburnum must have the space an outdoor planting provides, while others are ideal for smaller habitats. Plant the viburnum in large containers with drainage holes; the pot should be at least 8 inches wider than the root ball. This plant needs well-draining soil and full sun. To avoid soggy soil, add 10 to 20 percent perlite to the mix. Viburnum is hardy but might drop leaves in colder weather. Prune off dead leaves and branches.
Come spring, your shrub will recover. The fact that few pests bother viburnums is one of the reasons they have become so popular in the landscape. The best way to combat viburnum leaf beetles is to remove egg-infested leaves and encourage predatory insects. Some organic pesticides are also effective, but avoid synthetic pesticides, which also kill beneficial insects. If your viburnum is not blooming, look at the location—though it can handle some shade, those kept in full sun will form blooms more readily. Watering might also be an issue, as viburnum needs to be in well-drained soil. Remember that too much nitrogen can encourage lush foliage but stunt the explosion of blooms. Since the plant blooms on old wood, don't trim them during dormancy, as this will eliminate the bloom-producing buds. Fortunately, viburnum has few issues for gardeners to contend with. However, if you notice any of the following, treat the problem immediately to ensure the health of your plant.
This is often the result of a fungal disease, such as powdery mildew , downy mildew, or fungal leaf spots. To prevent this, avoid watering the plants from overhead, use a fungicide on affected plants, and destroy parts of the plant that are already affected. This might be the result of Armillaria root rot, which can be determined by a white fungal growth under the bark and at the crown of the tree or shrub. If this problem has made its way into the trunk, the only solution is to dig up and discard the viburnum. Viburnum could be affected by canker, which is a fungal problem. This often occurs with trees that are already stressed. The most effective treatment is restoring the plant to health, as it can likely fight off this particular issue on its own. To get the best blooms, keep the plant on a sunny windowsill. You can even do this during the winter, assuming you choose a hardy variety that can handle potential drafts.
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This plant can grow between 12 and 24 inches in one year. However, some dwarf varieties are very slow-growing and only clock in at about 6 inches in a year. How to Plant, Grow, and Care for Viburnum Varieties offer beautiful summer blooms, fall foliage, and evergreen leaves. By Marie Iannotti. Marie Iannotti. Marie Iannotti is a life-long gardener and a veteran Master Gardener with nearly three decades of experience. She's also an author of three gardening books, a plant photographer, public speaker, and a former Cornell Cooperative Extension Horticulture Educator. Marie's garden writing has been featured in newspapers and magazines nationwide and she has been interviewed for Martha Stewart Radio, National Public Radio, and numerous articles. Learn more about The Spruce's Editorial Process. Reviewed by Barbara Gillette. Barbara Gillette is a Master Gardener, herbalist, beekeeper, and journalist.
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She has 30 years of experience propagating and growing fruits, vegetables, herbs, and ornamentals. Keep me logged in. Forgot password? Back to login. Share Share this article on social media. There are more than a species of viburnum, ranging from deciduous shrubs with showy white hydrangea-like flowers to bushy evergreen viburnums that make a perfect hedge. They are very tough plants and there are different varieties to suit most climates. How to grow viburnum in a garden Choose a sunny spot with well-drained soil. In areas with heavy or clay soil, to help improve soil structure and drainage, add gypsum and mix in well. Dig the planting hole twice as wide and to the same depth as the root-ball. Remove the shrub from the container, gently tease the roots and cut away any circled or tangled roots. Position in hole and backfill with potting mix, gently firming down. Form a raised or doughnut shaped ring of soil around the outer edge of the plant's root zone.
This helps keep water where it's needed. Always water in well after planting to settle the soil around the roots and keep the soil moist for several weeks while the new plant establishes. Mulch around the base with organic mulch like bark chips, woodchip or pea straw, keeping it away from the trunk. Water deeply, once or twice a week, depending on weather conditions. How to grow viburnum in a pot Pick a variety that can be grown in a pot. Choose a pot at least mm wide and deep. Position in full sun. Fill pot with quality potting mix, such as Yates Premium Potting Mix. Water in well. More Plants. Daphne Daphne is an evergreen shrub with glossy green leaves and beautifully fragrant flowers in shades of white and pink. Dwarf Pohutukawa Dwarf Pohutukawa Tahitian Pohutukawa is a fantastic flowering shrub or small tree ideal for use as a feature plant, hedge or screen. Smoke Bush Smoke Bush is an ideal shrub to add a splash of foliage colour to gardens. Picea Piceas, or Spruces, are evergreen coniferous trees from the Pinaceae family with a lovely conical shape, needle-like leaves and ornate pendulous cones.
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