Growing Magnolias In Australia: A Step-By-Step Guide

how to grow a magnolia tree in australia

Magnolias are a popular choice for Australian gardens due to their variety, perfumed blooms, and year-round appeal. They can be grown as trees or shrubs and are celebrated for their stunning beauty and timeless elegance. With their wide range of cultivars, there is a magnolia to suit any outdoor space, big or small. In this guide, we will explore the different aspects of growing and caring for a magnolia tree in Australia, including the ideal climate, soil, watering requirements, and more.

Characteristics Values
Height 3-20 metres tall, depending on the variety
Foliage Oval-shaped, quite broad, around 15cm long x 10cm wide, with a definite pointed tip
Climate Warm temperate in cooler locations and cool temperate in warmer spots. Sub-tropical in cooler, elevated locations
Soil Rich, free-draining, prefers acidic conditions
Watering Requires reliable moisture during periods of flowering and leaf growth, and in hot weather
Sunlight Full sun to part shade, with shelter from hot afternoon sun and strong winds
Pruning Prune just above a node (growth point). Prune off anything that is dead, diseased or damaged
Flowers Large, cupped, bowl or goblet-shaped, with colours including white, pink, yellow, purple, ivory and green
Varieties Evergreen, Deciduous, Magnolia x soulangeana, Magnolia grandiflora 'Greenback', Magnolia 'Teddy Bear', Magnolia 'Little Gem', Magnolia 'Kay Parris', Magnolia 'Coolwyn Gloss'

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Choosing a variety: from 'Teddy Bear' to 'Little Gem', there are many types of magnolia

Magnolias are a magnificent addition to any Australian garden, offering year-round appeal with their bright, beautiful blooms and green, glossy foliage. With so many different varieties to choose from, it's easy to find a magnolia to suit your outdoor space, whether you're looking for a statement tree or a privacy screen. Here are some popular varieties to consider:

Teddy Bear Magnolia

The Teddy Bear Magnolia is a charming variety that can grow to a height of 4-5 metres. It produces large, showy flowers and has a compact, rounded habit, making it ideal for smaller gardens or for creating a privacy screen.

Magnolia Vulcan

The Magnolia Vulcan is a striking variety that can reach up to 5 metres in height. With its vibrant, richly coloured blooms, it adds a spectacular touch to any garden. Its flowers are usually large and fragrant, and its colour range includes bright pinks, vivid purples, and iridescent ivory.

Magnolia x soulangeana

This variety can grow up to 8 metres tall and 5 metres wide, forming a multi-stemmed shrub or a single-trunked small tree. It is known for its exquisite flowers, which can resemble fine bone china teacups or a ballet dancer's tutu.

Magnolia 'Exmouth'

The Magnolia 'Exmouth' is a true statement tree, reaching impressive heights of up to 12 metres tall and 5 metres wide. It is perfect for larger gardens and can create a stunning focal point.

Little Gem Magnolia

The Little Gem Magnolia is an evergreen variety that is perfect for those with limited space. It can grow up to 4 metres tall but can be pruned to maintain a height of 2 metres. It bears creamy white flowers in spring and summer and has beautiful deep green leaves with bronze colouring on the underside.

With such a diverse range of varieties available, it's no wonder that magnolias are a popular choice for Australian gardeners. Each variety has its own unique characteristics, from the size and shape of the tree to the colour and fragrance of its blooms. When choosing a variety, consider the amount of space you have, the climate and soil conditions, and the overall aesthetic you wish to achieve.

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Planting: plant in a hole twice as wide as the pot, then backfill and mulch

When you're ready to plant your magnolia tree, start by preparing the soil. Dig a hole that is twice as wide as the plant's original pot, and ensure that it is of the same depth. If you're planting in a pot, choose one that is at least 2 to 3 times bigger than the original nursery pot.

Next, gently remove the magnolia from its nursery pot, taking care to lightly tease the roots if they are compact. Place the plant into the hole or pot and backfill around it with fresh soil or potting mix. The final level of mix should match the current level of the plant.

Keep the soil moist as the plant establishes itself, and be sure to water it well. Applying an organic mulch around the base of the tree (keeping it away from the trunk) will help to retain moisture and prevent soil moisture loss. For potted magnolias, spread mulch over the surface of the potting mix, again, keeping it away from the plant's main stems.

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Watering: ensure reliable moisture during flowering and leaf growth, and in hot weather

Watering your magnolia tree is critical to ensuring its survival, especially during flowering and leaf growth, and in hot weather. Here are some detailed tips for watering your magnolia tree in Australia:

Firstly, it is important to understand that magnolia trees prefer slightly acidic, well-drained soil. They do not like to have wet roots, so ensure the soil is damp but not waterlogged. You should also consider the type of soil your tree is planted in, as this will influence the amount of water required. For example, if your soil is sandy, you may need to water more frequently, such as three times per week, to prevent the roots from drying out. On the other hand, clay soil holds more water, so watering twice a week should be sufficient.

When establishing your magnolia tree, deep watering is essential to promote root development. Newly planted trees should be watered two to three times per week for the first three to six months. A general guideline is to use about 10-20 litres of water per one metre of tree growth. You can also create a saucer-shaped depression around the tree to funnel water directly to its roots. Applying mulch is another effective way to retain moisture in the soil and protect shallow roots.

Once your magnolia tree is mature, you can reduce watering frequency. A good rule of thumb is to water established trees once per week, providing two to three gallons of water for every inch of trunk diameter. However, during hot and dry weather, it is crucial to increase watering and maintain moisture to prevent leaf damage and wilting.

In summary, by understanding your soil type and providing adequate watering schedules, you can ensure your magnolia tree receives the necessary moisture during critical stages of flowering and leaf growth, especially in hot Australian weather. Remember to adjust your watering habits according to the season and the maturity of your tree. With proper care, your magnolia tree will thrive and flourish.

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Soil: rich, moist, free-draining, and slightly acidic

When it comes to soil, magnolia trees require it to be rich, moist, free-draining, and slightly acidic. While they can grow in average garden soil, it must drain freely. In their natural habitat, magnolias grow in soil that is deep and rich in rotted organic matter.

To prepare the soil for planting, mix a good compost and well-composted manure, such as cow manure, into the soil. You can also add a specially formulated, nutrient-rich mulch to give your magnolia tree the nutrients it needs to produce flowers. Apply the mulch around the base of the tree, keeping it away from the trunk, to prevent soil moisture loss.

If your soil is clay-like and always wet, you can improve its drainage by using a soil improver such as Yates Gypsum Clay Breaker Soil Improver Granules. Alternatively, you can bring in garden soil and create a raised garden bed or plant your magnolia on a gently sloping mound.

When planting a magnolia tree, create a saucer-shaped depression around the tree to funnel water directly into the root zone. Keep the soil moist, especially during hot and dry weather, but avoid letting too much water sit around the roots.

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Climate: full sun to part shade, with protection from hot sun and strong winds

Magnolia trees prefer a sunny spot, but they can also grow in partial shade. They require shelter from the hot afternoon sun and hot winds, and they must be planted in the coolest possible spot in hotter zones. In frost-prone areas, young plants will need to be protected from frost for the first few winters.

Magnolias are relatively low-maintenance trees that can thrive in various climates and soil types. They prefer a temperate climate and dislike temperatures below zero for extended periods. They grow naturally in soils that are deep and rich in rotted organic matter, and they require reliable moisture during flowering and leaf growth, as well as in hot weather.

To retain moisture, you can apply a product such as Yates Droughtshield during very hot weather. Keep the plants well-watered during dry weather, but don't let too much water sit around their roots. The soil should be moist but not wet, as magnolias require well-drained soil.

In terms of soil type, magnolias prefer a slightly acidic, rich, and moist soil with additional organic matter such as quality compost or well-composted manure. However, they will grow in regular garden soil as long as it drains freely and has a reliable source of moisture.

When it comes to choosing a magnolia tree for your garden, it's important to consider the size of the tree and the amount of space you have available. Magnolias come in a range of sizes, from small and compact dwarf cultivars to large majestic feature trees. For smaller gardens, consider the 'Little Gem' or 'Teddy Bear' varieties, which can be grown in pots or planters with good drainage.

Frequently asked questions

Magnolias thrive in full sun to part shade, with shelter from hot afternoon sun and strong winds. They prefer a temperate climate and a moist, free-draining, slightly acidic soil. They can be grown in pots or in the ground.

If planting in the ground, dig a hole twice as wide as the original pot and the same depth. Remove the magnolia from its pot and place it in the hole, backfilling around the roots with fresh potting mix. If planting in a pot, choose a pot at least 600mm wide and fill it with a quality potting mix. Remove the magnolia from its pot and place it in the new pot, backfilling around the roots. Keep the soil moist as the plant establishes.

Magnolias need reliable moisture during flowering and leaf growth and in hot weather. They will benefit from fertilising 2-3 times per year. Pruning is not necessary but can be done to encourage bushy growth. Apply mulch to the base of the tree to prevent soil moisture loss.

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