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): 30โ€“60 cm per year once established, reaching 3โ€“5 metres at maturity.
  • Viburnum tinus: Slower, usually 20โ€“40 cm per year, growing 2โ€“3 metres over time.
  • Snowball Viburnum (V. opulus): Moderate growth of 20โ€“40 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.

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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 1โ€“2 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 4โ€“6 weeks during the growing season increases Viburnumโ€™s growth rate, often doubling the speed compared to unfed hedges. Pruning combined with feeding stimulates new growth and encourages a thicker, bushier hedge.

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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 30โ€“60 cm annually once established, while Viburnum tinus is slower at 20โ€“40 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.

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