Viburnum
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How Fast Does Viburnum Grow? (Growth & Fertiliser Guide)
Viburnum hedges, including popular varieties such as Sweet Viburnum (Viburnum odoratissimum) and Viburnum tinus, are fast-growing screening plants in Australian gardens. Growth speed depends on the species, climate, and feeding program, but with the right care, they can form dense hedges within a few years.
Typical Growth Speeds
On average, Viburnum grows:
- Sweet Viburnum (V. odoratissimum): 30โ60 cm per year once established, reaching 3โ5 metres at maturity.
- Viburnum tinus: Slower, usually 20โ40 cm per year, growing 2โ3 metres over time.
- Snowball Viburnum (V. opulus): Moderate growth of 20โ40 cm per year, best for decorative use.
Growth is fastest during warm spring and summer months. In cooler areas, growth slows dramatically in winter, even with fertiliser support.
How Fertiliser Influences Growth Speed
Although Viburnum is hardy, it grows much faster and denser when given regular fertiliser. Nutrient-rich soil ensures multiple flushes of foliage each year and helps the hedge fill in quickly.
- Nitrogen (N): Essential for strong green leaf growth. Without it, Viburnum grows slowly with pale foliage.
- Phosphorus (P): Strengthens roots, vital in the first 1โ2 years of hedge establishment.
- Potassium (K): Improves overall plant strength, keeping foliage lush and resistant to pests and leaf spot.
- Magnesium & micronutrients: Prevent yellowing leaves and keep growth steady.
Regular liquid feeding every 4โ6 weeks during the growing season increases Viburnumโs growth rate, often doubling the speed compared to unfed hedges. Pruning combined with feeding stimulates new growth and encourages a thicker, bushier hedge.
Common Reasons Viburnum Grows Slowly
If your Viburnum is not growing as expected, the cause is usually one of the following:
- Planted in poor or sandy soil without additional fertiliser.
- Lack of water during establishment โ shallow roots dry out quickly.
- Planted in heavy shade, slowing leaf production.
- Over-pruned without follow-up fertilisation.
To avoid these issues, maintain consistent watering and feeding. Complete Grow All Purpose Liquid NPK 20-20-20 is ideal for Viburnum hedges, delivering balanced nutrition for fast establishment and lush seasonal flushes.
FAQ โ Viburnum Growth Speed
How fast does Viburnum grow per year? Sweet Viburnum can grow 30โ60 cm annually once established, while Viburnum tinus is slower at 20โ40 cm.
Which Viburnum is the fastest-growing? Sweet Viburnum (V. odoratissimum) is the fastest, often used for tall privacy screens.
Does fertiliser make Viburnum grow faster? Yes, consistent feeding significantly increases growth speed and hedge density.
Why is my Viburnum growing slowly? Common reasons include nutrient deficiencies, poor soil, shade, or drought stress.
What fertiliser is best for Viburnum? A complete NPK liquid like Complete Grow 20-20-20 ensures steady growth and vibrant foliage.
More Viburnum Care Guides
- How Fast Does Viburnum Grow? (Growth & Fertiliser Guide)
- What Is the Best Fertiliser for Viburnum?
- When to Prune Viburnum in Australia
- How to Plant a Viburnum Hedge in Australia
- Why Are My Viburnum Leaves Yellow?
- How to Make Viburnum Grow Faster
- Are Viburnum Roots Invasive in Australia?
- How to Treat Viburnum Leaf Spot
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What is NPK 20-20-20 Fertiliser?
