How to Care for Flowering Viburnum Shrubs. Viburnum dentatum, commonly called arrowwood viburnum, is an upright, rounded, multi-stemmed, deciduous shrub which typically matures to 6-10' tall with a similar spread, but may reach a height of 15' in optimum growing conditions.Non-fragrant white flowers in flat-topped corymbs (to 4" diameter) appear in late spring. I've had a Viburnum a couple of years now - when it first arrived (via post) it was a mere stick, and I didn't expect much the first year. It can also be used for hedging. Getting a viburnum shrub to bloom isn’t rocket science, but it does require that you pay close attention to placement, care, and pruning. Viburnum burkwoodii is very easy to grow however it may be helpful to know that a very small plant which is planted in the ground will take about 1/8 – 1/4 cup of fertilizer. Viburnum are one of the most popular groups of shrubs with a wide range of growth habits and flowering times. Plants need to bloom so they can reproduce. It has always in the past but not this year. In the southernmost areas of their range, they may need protection from the blaze of afternoon sun. Lack of sun is another possibility. Overall, they're looking sparse. The white flower clusters are nicely rounded and very fragrant. The second number, P, stands for amount of phosphorous. Viburnum, like other spring bloomers, must be pruned immediately following blooming. Trimming them during dormancy will result in … Most flower either in winter or late spring. The flowers start as pink buds and change to white blooms with a hint of the early pink color. Fruit is red aging to black; it is showy, if not always profuse. There are several potential reasons for your lack of blooms. Viburnums. Protect winter and early spring flowering forms from strong winds and morning sun. A non-blooming viburnum is usually the result of the plant's young age (or recent transplant) or ill-timed pruning. Another common cause for non-flowering viburnums is improper pruning. Those who grow viburnum say one of their charms is that you really don’t have to prune them. There are more than 150 varieties of viburnum, a flowering shrug that includes semi-evergreen, evergreen and deciduous cultivars. Lawn fertilizer will have a large ratio of N. You don’t want that for your viburnum. Viburnum spp. A. It’s a popular choice for hedging but may also be grown as a specimen shrub in a mixed border. Viburnum, also known as Snowball, is a diverse family of shrubs. Vie-BUR-num. Another common cause for non-flowering viburnums is improper pruning. If your viburnum doesn’t bloom, it could be because the species you have planted isn’t appropriate for your growing zone. Non-flowering viburnums can be a huge disappointment, especially if your plant is well-established. We have a large viburnum. If your viburnum doesn't bloom, it could be because the species you have planted isn't appropriate for your growing zone. Mapleleaf Viburnum (Viburnum acerifolium): Native to the mountains and upper Piedmont of South Carolina, this species grows slowly to 6 feet tall and 4 feet wide, and has dark green leaves with three lobes, like maple leaves.This species has excellent fall color with leaves turning bright pink to reddish purple in fall. The age of your plant can be another factor. Most viburnums have eye-catching berries to top off the pretty flowers and foliage. Don’t prune until after the viburnum blooms. I don't think we are doing anything different. Asked May 30, 2019, 2:54 PM EDT. Water thoroughly during dry weather until well established. Start by removing weeds and grass within a metre of your desired planting hole, then dig a square hole as deep as the root mass and approximately 2x as wide. are not very precise and in a few cases (e.g., V. prunifolium) seem to be inaccurate. Sign up for our newsletter. If they’re getting too much nitrogen, a flowering plant can get “lazy” and not bother to bloom. Add Answer. Too much nitrogen in the soil, or added as a fertilizer, will encourage your bush to put out a lot of lush, vegetative growth instead of putting energy into forming blooms. It's in a pot & sits on a north facing balcony & only gets sun in the morning. Although he listed the order of bloom, he indicated nothing about the length of the flow-ering period or any overlap in flowering times. Many cultivars bear ornamental fruits, but viburnums are best known for their spectacular blossoms that can range from cream and white to partly or wholly pink. It was previously included in the honeysuckle family Caprifoliaceae.. Many are native to North America, but their range extends to Southeast Asia and South America. Viburnums near fertilized lawns may be soaking up excess nitrogen fertilizer from run-off – carefully fertilizing your lawn will both save you money and encourage your viburnum to bloom once most of the nitrogen in the soil is used up. A multi-season beauty, Viburnum plicatum f. tomentosum 'Shasta' (Doublefile Viburnum) is a dense, multi-stemmed, deciduous shrub without equal when it comes to flowering. They also like moist, acidic soil that is well drained. Now that you know some of the most common reasons for viburnums not blooming, you’ll be better able to manage this problem in the future. Plant does fruit in December. Viburnum is a genus of about 150–175 species of flowering plants in the moschatel family Adoxaceae.Its current classification is based on molecular phylogeny. In full sun it could be because the species you have planted is n't appropriate for your zone! 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