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Viburnum | Growing and Care Guide Australia

Often known as the joy of plants, the viburnum, Viburnum spp, belongs to the 150-strong plant, shrub, and decorative tree family. Since the plant's beautiful and scented flowers often cause the branches to bend under their weight, the plant is named after the Latin word 'viere,' which means to bend/weave.

Read on to learn how to grow and care for viburnum plants in your garden. 

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Viburnum Plant Details

Viburnum is commonly found in subtropical and temperate climates, usually in the northern hemisphere

The plant is commonly found in subtropical and temperate climates, usually in the northern hemisphere. Some species are commonly grown in other environments as well. The viburnum can grow to a height of 2 meters.

As an addition to your garden, the plant's densely green leaves interspersed with magenta and white buds are a perfect choice. During winters, viburnum flowers are a pale pink or white shade and fuse the air with a light, talcum-y fragrance.

The dark berries of the viburnum are the perfect adornment for your bushes, and the plant is only without flower and fruit for a very short while.

With viburnum, you don’t have to fight the urge to eat the small, brightly-coloured berries, because they are entirely safe for consumption. To find out more about eating and cooking with Viburnum.

Viburnum Varieties

Viburnum Odoratissimum

Viburnum odoratissimum is an iconic hedging plant grown throughout Australia

Viburnum odoratissimum is an iconic hedging plant, grown throughout Australia thanks to its highly scented blossom, and its ability to regenerate from old wood. This makes it perfect for hedging and easy to form into neat rows.

Despite its popularity as a hedging plant, V. odoratissimum grows naturally as a compact tree, reaching around 2m tall after 5-10 years with beautiful bark and waxy evergreen foliage.

Viburnum Tinus

Viburnum tinus hedge plant, known by its Latin name of Laurustinus, blooms beautifully during the winter months

Tired of having a dreary garden every winter? The Viburnum tinus hedge plant, known by its Latin name of Laurustinus, blooms beautifully during the winter months.

With clusters of stunning white blooms that range from pink buds in mid-December to spring, with dark green foliage contrasting the flowers, the Viburnum tinus is an instant beautifier of your garden space. Its hedging also features blue-black fruits that are appealing to foraging birds.

Viburnum Opulus

Viburnum opulus, sometimes known as European cranberry bush, is a highbush cranberry native to Europe, Asia, and North Africa

Viburnum opulus, sometimes known as European cranberry bush, is a highbush cranberry native to Europe, Asia, and North Africa. It is a deciduous shrub with a rounded spreading habit that can reach a height of 10-15 feet.

It has small lace-cap shaped white flowers, and wide cymes of minuscule florets that are surrounded by larger ones. The three-lobed, dark green leaves in contrast to the florets make  a visually appealing combination.

The red berries of the plant resemble cranberries, and are edible, but very bitter in taste. During autumn, the foliage sometimes changes from bright green to a reddish hue. 

Viburnum Plicatum

Viburnum plicatum has white flowers, and the black fruit attracts pretty foraging birds to your garden space

Viburnum Plicatum is an Asian shrub that may grow to be 10 feet tall, and 10 feet wide at the same time! The plant has white flowers, and the black fruit attracts pretty foraging birds to your garden space.

If you are worried about your plants losing colour in the winter, the Viburnum Plicatum mitigates that worry through its beautiful crimson and purple hues in fall. The plant can thrive in nearly all conditions, from full sun to shade, and also all variations of soil. 

Viburnum Carlesii

Viburnum carlesii thrives in a range of environmental conditions from full sun to moderate shade and all kinds of well-drained soils

The fragrant Korean Viburnum thrives in a range of environmental conditions from full sun to moderate shade and all kinds of well-drained soils. The plant has strong, straight branches and the flowers are vibrant and fragrant.

Since the Korean Viburnum blooms on old wood, you should only prune the plant right after the blooming season is over. The plant can be grown in many ways, ranging from as a hedge, as borders for shrubs, or as a foundation plant.

Flowers with a strong fragrance develop in the middle to late spring, and noticeably fill your garden with their scent. The plant doesn't lose colour and dull out during fall, instead adopting a beautiful reddish-burgundy shade.

Viburnum Davidii

Viburnum Davidii blooms in May with bunches of white flowers and is very easy to cultivate

Viburnum Davidii blooms in May with bunches of white flowers and is very easy to cultivate. The plant grows very quickly when young, but slows down with age and can be pruned beautifully per your wishes.

The plant likes bright sun, but can thrive in partial, even full shade. However, for you to enjoy the full bloom of its many flowers, you should grow it in areas with brighter sunlight.

A range of environmental conditions can keep the viburnum happy, from alkaline soils to slightly acidic It is not appropriate for use as a formal, neatly cut hedge, but it does produce a lovely informal border with bright colours during fall and winter. 

How to Grow Viburnum

How to Grow Viburnum

Growing Viburnum from Seeds

Growing viburnum from seeds is a labor-intensive process, so you should instead look to propagate. However, if you want to use seeds, use warm stratification for at least two months on the seeds.

This involves keeping some environmental factors to imitate summer, like keeping the seeds with wet sand at 79-85 degrees in a sealed container or bag. Next, you should use cold stratification by keeping the sealed container in a refrigerator for a couple of months.

Use seedling trays in either a cold frame or an outdoor climate appropriate for the plant. The seeds may not germinate if there's a slight issue with any factors, so make sure you know the specifications for the type of seed you have. 

Transfer the seedlings to a pot around, and only plant the seedlings into the soil in late springtime.

Propagating Viburnum

Viburnum propagation is the easier way to grow it where you want. You can use both softwood and hardwood cuttings. You can also layer branches during autumn and use the new plant to grow the type you want.

How to Care for Viburnum

How to Care for Viburnum

Fertilisation

While it isn't among the plants that need a lot of fertilisation to get by, sporadic fertilisation makes it grow well. If your plant is in the ground, you need to follow a different fertilisation procedure than if your plant is in a container.

The best time to fertilise your plant is right after they bloom, to keep them looking sprightly and ensure healthy growth. Use tree food, organic food, and a slow-release fertiliser.

Here is our complete Australian garden fertilisers guide to help you choose the right fertiliser for this plant. 

Make sure that the fertilisation is done well in advance of wintertime since lower temperatures can ruin fertilisation. In varieties that are well-suited to the type of viburnum you have, water-soluble plant food is a good option for potted plants. 

Slow-release granular fertiliser or any other semi-solid liquid plant food can give your plant the extra boost it needs to grow into a robust and healthy plant.

The amount of fertiliser depends on many factors, such as the height and width your plant type is likely to grow into. Make sure when you are purchasing seeds for your viburnum, you also ask the seller to clarify the kind of fertiliser you should give them.

Understanding the structure of the this plant is essential to maintaining that you aren’t over-feeding your plant and thus, in turn, killing it. 

Some species grow roots around 18-20 inches below the ground, and only the first ten or so inches are responsible for absorbing nutrients.

Therefore, some fertiliser on the surface area of the base of the roots is enough. Make sure each shrub gets an even distribution of fertiliser, 11-12 inches away from the base of the trunk and drip line.

Optimum Soil Conditions 

On the pH scale, viburnum thrives best in moderately acidic conditions to slightly alkaline levels, ranging from 5.5-8. It is essential here, too, to create soil acidity per the requirements of the specific type of Viburnum plant you are using.

Viburnum propagation is the easier way to grow it where you want

Watering Viburnums

This plant prefers water, but not to the extent that the plant is waterlogged. Mushy, soggy, or turgid soil conditions cause the plant to sicken and become more vulnerable to bacteria-borne diseases.

Well-drained soil is sufficient for all species of viburnum to be adequately hydrated. Different species have different levels of tolerance towards drought and waterlogging. 

Giving a different species the incorrect amount of water can result in root rot, pests, and your plant sickening and dying. You should also frequently check soil moisture levels to ensure your plant gets only as much water as it needs.

The perfect water quantity mixed with a growth simulator at the planting time ensures a healthy, vibrant growth for your viburnum. As soon as you have sowed the seeds or propagated the shaving, soak the planting area/container liberally with a water-growth simulator mixture.

Since viburnum as a seedling plant is very susceptible to root shock and decay, a growth simulator mixed with water may give it an extra edge of strength.

Watering Viburnum at Later Stages

A young plant needs precise, required amounts of water to give you the kind of blooming shrubbery you are envisioning. The sure-fire way to kill a young viburnum plant is by watering it every day.

Waterlogged soil causes many issues like root decay that a young plant is not equipped to fight. If you live in areas of Australia that have summer rain, you needn't bother watering your Viburnum frequently.

However, keep the root area and surrounding soil between damp-moist during dry spells and droughts. Many people presume that splashing plants with water is the correct way to water them.

Instead, opt for deep-soaking the soil infrequently, letting it dry, and then watering the plant again balances the water quantities out perfectly.

Since most viburnum shrubs bloom best when planted during fall-winter, evaporation is slower, and they need less water. Assuming that the dry leaves and bugs represent a dry plant is a grave mistake.

Planting Viburnum

When and How to Prune Viburnum

Pruning viburnum encourages a well-branched shrub with denser growth. Light pruning can be done at any time during the growth season, but heavy pruning should be done in late winter or early spring if necessary. 

It is critical not to prune too late in the year because then you can kiss a pleasant-smelling, heavy bloom goodbye until next year.

Light pruning can be done soon after the blooming season is over, and you are noticing some decaying leaves and growth weighing down the plant’s branches. 

When feeling compelled to eat the berries during the pruning period, remember that you must leave the blossom heads intact. Maintenance pruning and sucker removal can be done at any time of year. 

Pruning to narrow out overgrowth should be done between February and right before flowering. Heavy pruning is best done in March or early April to allow new shoots to develop. 

Even if you prune in the wrong season, the viburnum will not be harmed. You may miss a period of bloom, but the shrub will not die as a result.

Need a new pair of secateurs? Check out our review on the best secateurs you can get online

Common Viburnum Pests and Diseases

While viburnum is generally pest-free, it can be susceptible to pests and diseases if certain environmental conditions are compromised.

  • Powdery mildew can appear on leaves, but do not spray with sulfur-based sprays as this may cause harm to the foliage. There can be only some things causing your plant’s disease, and cutting those out will make the plant recover quickly- overwatering.

    Avoid over watering when not needed, use a fungicide if the disease is severe, and discard any damaged leaf material. Make sure to routinely check the level of moisture in the soil and use a drainable pot to store the plant. 
  • Botryosphaeria canker is a devastating disease that affects many ornamental plants, including the viburnum. It is distinguished by dead or wilted leaves.

    There is no cure for viburnum infection, but on the occasion that the plant fights off the canker, it can typically tolerate the fungal attack many more times. 

Wrapping Up Our Viburnum Growing Guide

You can pick off the flower heads and press them into books or enjoy the berries some species produce in juices, salads and drinks- the opportunities are endless! 

There is no denying that the pretty foliage of viburnum will spruce up any garden space indoors or outdoors. Learning to grow and care for it is pretty simple, and viburnum doesn't disappoint in the blooming and brightening department.

Viburnum Growing and Care Guide Australia

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Author:

Gary Clarke

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