kowhai tree size

How Big Does a Kowhai Tree Grow?

Kowhai tree size depends on the variety in question. Most commonly, mature kowhai trees range from small to medium height in domestic gardens, but in the wild, some species can become surprisingly large. On average, you can expect a well-established kowhai to reach between 5 and 12 metres tall, with a spread of 3 to 6 metres depending on the species. Take note that kowhai trees grow slowly at first, but once established, they can quickly rise to fill their space.

Kowhai Tree Size by Species

Not all kowhai are created equal. Here’s a breakdown of kowhai tree size according to some of the most popular species found in New Zealand gardens:

Sophora tetraptera (Large Leaved Kōwhai)

Known for its lush, large leaves and impressive stature, Sophora tetraptera (Large Leaved Kōwhai) is one of the largest kōwhai species in New Zealand. Mature specimens can reach up to 12 metres tall and develop a rounded crown up to 6 metres wide, making it a stunning feature tree for bigger gardens or lifestyle blocks.

Sophora microphylla (Small Leaved Kōwhai)

A favourite due to its classic look and manageable size, Sophora microphylla (Small Leaved Kōwhai) typically grows to around 8 metres tall, with a spread of about 4 to 5 metres. Its slightly smaller form makes it suitable for urban gardens seeking a native touch without overwhelming the space.

Sophora longicarinata (Limestone Kowhai)

Renowned for its delicately weeping habit, Sophora longicarinata (Limestone Kowhai) is one of the more compact kōwhai options. It typically matures at 4 to 6 metres high, perfect for smaller gardens or as a distinctive understorey planting.

Sophora godleyi (Godleys Kowhai)

With elegant foliage and a graceful shape, Sophora godleyi (Godleys Kowhai) regularly reaches around 8 to 10 metres tall and about 5 metres wide, striking a happy medium for most larger suburban gardens or shelter belts.

Sophora chathamica

Often found growing naturally near the coast, Sophora chathamica can reach up to 10 metres tall. Its spreading canopy is a favourite for providing dappled shade and its size makes it a perfect candidate for feature planting or wildlife corridors.

Choosing the Right Kowhai for Your Garden Size

When selecting a kowhai tree, always consider both the mature size and the growing space available. Smaller gardens benefit from graceful species like Sophora longicarinata (Limestone Kowhai), while those with more room might opt for Sophora tetraptera (Large Leaved Kōwhai) or Sophora chathamica to create a stunning, wildlife-friendly focal point.

Final Thoughts

Understanding kowhai tree size will help you make an informed decision for your New Zealand garden. Whether you’re dreaming of towering branches filled with tuis or a compact specimen tucked into a courtyard, there’s a kōwhai to suit your space. Explore our range of kōwhai species to find the perfect tree for your landscape.