Renewal may affect the succeeding year’s bloom, so limit its use to overgrown plants or plants whose bloom has fallen off. How to Prune Snowball Bushes. Viburnums range in height from 2 feet to 30 feet. An avid perennial gardener and old house owner, Laura Reynolds has had careers in teaching and juvenile justice. Prune panicle hydrangeas such as “Limelight” or “Tardiva” back to within 4 to 6 inches of the main stem. Prune the bush after the flowers bloom in spring. Pruning buds destroys the flowers. Only during prolonged drought will established plants require supplemental irrigation. This Japanese snowball bush flowers earlier than the other varieties. Hard prune your snowball viburnum for shape and size every few years or as needed. (Blooms on "old wood.") Pruning Viburnum isn’t necessary. In Southern gardens, smooth-leaf hydrangea (H. macrophylla) is also called snowball. Prune to shape immediately after flowering. Viburnum plicatum ‘Popcorn’ opens Japanese snowball type flowers in spring. One of the more well-known species is the old-fashioned Snowball viburnum (V. opulus) with beautiful, white snowball … A hardy shrub that does well in zones 2 to 9, it is easy to plant and care for, and requires very little maintenance. While there are over 150 varieties of viburnum, one of the most popular is known as the "snowball bush." Snowball viburnum is a white blooming varietal of viburnum that produces round-shaped flower heads made up of multiple blooms that resemble snowballs. It is better to take cuttings between November and February, Summer in Australia. Every couple of years, it can benefit from a more severe pruning to help encourage more plentiful growth. Rejuvenation pruning can be performed on old, overgrown plants. It grows up to 20 feet in height at maturity and though it does not require regular heavy pruning, it might need to be pruned every few years to control its shape or size. Viburnum opulus and Viburnum lantana - if they need pruning at all - can be kept under control, by cutting out 1 in 3 branches at near to ground level. The 7.6cm flower clusters are apple-green when they start and then change to white. There are several different types of viburnums. In addition to being time-critical, annual pruning needs vary: For example, viburnum requires little regular pruning, while Annabelle stays tidy but productive only with annual renewal pruning. To propagate cuttings take softwood cuttings from fully grown snowball trees, do this early in the morning. Tip Water your snowball viburnum deeply after pruning to support the plant through a stressful period. However, if pruning is desired for size or shape control, shear or trim these bushes after flowering. The individual florets grow in clusters usually found at the ends … Chinese viburnum (Viburnum macrocephalum), Annabelle hydrangea (Hydrangea arborescens "Annabelle") and panicle hydrangea (H. paniculata) are all called snowball bushes. How to Prune Snowball Viburnum. Plan the perfect garden with our interactive tool →. Prune lightly to maintain the shrub's natural roundish shape or shear and cut the branch tips back more dramatically to create hedging or a trained-tree form. Use clean, sharp secateurs and place all cuts at least a quarter inch above a leaf node or bud. This will lead to quick blooming. … Pull each off cut out of the shrub and inspect your work before making the next cut to give a professional and natural looking result. Prune these shrubs based on how they form their flowers. The three-inch clusters of snowball flowers start out apple-green and morph to white, eventually fading to a rosy color, as do some hydrangea shrubs. These showy shrubs bloom with large clusters of tiny white flowers, which resemble snowballs. It is often used as hedging or specimen plantings and can be formed into tree form by topiary pruning. Viburnums typically form their flower buds for the following year during the summer after flowering. Prune lightly to maintain the shrub's natural roundish shape or shear and cut the branch tips back more dramatically to create hedging or a trained-tree form. Japanese snowball viburnum has, as the name suggests, a connection to Japan. The guelder rose, Viburnum opulus, is a hardy, vigorous native shrub suited to growing in woodland gardens or a shrub border.It offers interest for most of the year, bearing large, lacecap-like, white flowers from late spring to early summer, followed by bunches of small, bright red, fleshy fruit in autumn. A: The best time to prune a snowball bush, Viburnum macrocephalum, is after it finishes blooming and the white flowers have turned brown.Keep in mind that this shrub is naturally quite large. Spectacular landscape specimen. Hard prune your snowball viburnum for shape and size every few years or as needed. Do this each year, always cutting out the older branches of course, and you will have a steady supply of new growths, and flowers/berries on the older growths. [1] X Research source Deadheading, or cutting off the flowers, won’t harm viburnum. It is best to plant your Viburnum plicatum or Japanese snowball in fall to favor root development before winter and renewed growth in spring. Expect viburnum snowball bushes to blossom in May. With rejuvenation pruning, the old bush is replaced completely over a period of three to five years. Japanese snowbell tree is e prized for its graceful spreading canopy and waxy white or pink bell-shape spring flowers. 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