Lyla Lindsey
Lavender is a fragrant, low-maintenance plant with delicate purple blooms and silvery-grey foliage that is well-suited to the Australian climate. It is a popular choice for gardeners due to its beauty and versatility, and its ability to thrive in a range of climates, from temperate to subtropical. Australia's diverse climate offers opportunities to grow a wide range of lavender varieties, each with its unique characteristics and growing requirements. This paragraph will explore the topic of growing lavender in Australia, including the best conditions for its growth and the benefits it offers to local gardens.
| Characteristics | Values |
|---|---|
| Climate | Cool, temperate, arid, or subtropical |
| Soil | Well-drained, light, free-draining, slightly alkaline (pH 7.0-8.0) |
| Watering | Requires deep, infrequent watering, drought-tolerant |
| Sunlight | Full sun, 6-8 hours of direct daylight |
| Humidity | Tolerates mild humidity, sensitive to high humidity |
| Frost | Tolerates light frost |
| Pruning | Requires regular pruning to maintain shape and promote growth |
| Fertiliser | Requires fertilising once every 6 months |
| Pests and diseases | Relatively pest and disease-free, may be affected by aphids, spider mites, or fungal diseases |
| Varieties | English, French, Spanish, Italian, Lavandin, Fernleaf, Hidcote Blue |
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What You'll Learn
Best time to plant lavender in Australia
Lavender grows best in Australia's cool, temperate, or arid climates. It can be grown in pots or planters with good drainage and well-drained soil that's slightly alkaline (pH 7.0-8.0). Avoid clay soils as they retain too much moisture, which can lead to root rot. French lavender, for example, thrives in hot, dry climates and is one of the more heat and drought-tolerant varieties. It can also withstand moderate humidity and cold temperatures down to about -7ºC.
When it comes to the best time to plant lavender in Australia, it depends on the type of lavender and the specific region's climate. Generally, lavender seeds must undergo a cold period to germinate, so planting before winter is ideal. Seedlings or starter plants can be planted in spring (September to November) so they can establish themselves before the growing season. In mild to cool climates, such as Victoria, and temperate climates, like Sydney, you can plant lavender from mid to late autumn. In subtropical climates, such as Brisbane, try planting between mid-autumn and early winter.
Lavender cuttings are typically taken in autumn after flowering, and they should be planted at this time as well. Autumn is an ideal season for planting because it allows the plants to establish themselves before the hot summer months.
It's important to note that lavender is not well-suited for tropical regions in Northern Australia or extremely cold regions of Tasmania. However, with the right variety, some places in Tasmania have climates similar to Provence, France, which are suitable for growing lavender.
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Soil and drainage requirements
Lavender grows best in well-drained soil that is slightly alkaline (pH 7.0-8.0). It is important to avoid clay soils as they retain too much moisture, which can lead to root rot. To improve drainage in heavy or clay soils, add organic matter such as rock or pea gravel, or plant lavender in raised beds. The plant does not like acidic soil, so consider adding agricultural lime, finely ground eggshells, or a liquid lime and dolomite fertiliser to raise the pH.
When growing lavender in pots, choose a well-draining potting mix with chunky elements like pumice, sand, and coco chips. Make sure the pot has enough drainage holes and keep an eye on the moisture level, using a moisture meter or wooden chopstick to keep track. For potted plants, the potting mix should be kept slightly moist, and the plants should be watered regularly.
Lavender is a hardy plant that is adapted to poor soils in dry climates. It thrives in warm, dry summers and mild winters, similar to the Mediterranean climate. It prefers low humidity and does not do well in tropical climates with high humidity. In subtropical regions, Lavandula dentata or a hybrid variety may be more suitable.
In Australia, lavender grows well in most climatic zones except tropical zones, where it struggles with high humidity. It is important to choose the driest part of the garden for planting lavender and to ensure that plants have enough space around them for airflow in more humid areas.
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Varieties of lavender for different Australian climates
Lavender is a hardy, fragrant shrub that is well-suited to the Australian climate. While it thrives in cool, temperate, and arid climates, it struggles in tropical regions with high humidity, such as Northern Australia. Here are some of the best lavender varieties for different Australian climates:
French Lavender (Lavandula dentata)
French lavender is perfect for hot, dry climates and is one of the most heat and drought-tolerant varieties. It can also tolerate moderate humidity and is cold-resistant down to -7°C. French lavender has richly fragrant foliage and mildly scented flowers, which peak in summer and autumn. This variety is ideal for Australia's warm, humid climate.
English Lavender (Lavandula angustifolia)
English lavender, also known as "'true lavender," is native to the Mediterranean. It prefers warm, dry summers and cool winters, with mild frosts. This variety has blue-purple flower spikes, grey-green foliage, and a long flowering period. It is one of the edible lavender varieties and is perfect for herb gardens. English lavender is also deer and rabbit-resistant and attracts bees and butterflies.
Italian Lavender (Lavandula stoechas)
Italian lavender, also known as Spanish lavender, has distinctive 'wing' petals and highly scented flowers in shades of purple, pink, or white. It tolerates humidity better than other varieties, making it suitable for coastal areas. This variety is excellent for shrub borders, cottage gardens, and hedges.
Lavandin (Lavandula x intermedia)
Lavandin is a hybrid variety that combines the cold tolerance of English lavender with the heat tolerance of Portuguese lavender. It has an abundance of long, slender, highly fragrant flowers during spring and summer and is frost-resistant. Lavandin is ideal for hot, dry gardens and is perfect for mass plantings, hedges, and garden borders.
Fernleaf Lavender (Lavandula pinnata)
Fernleaf lavender has fern-like grey-green leaves and does not have the typical lavender smell. It prefers well-drained soil and at least six hours of sunshine daily. This variety is a unique addition to any Australian garden.
Hidcote Blue Lavender
Hidcote Blue is a popular variety of English lavender known for its deep purple-blue flowers and upright, bushy habit. It is deer and rabbit-resistant, attracts bees and butterflies, is frost-hardy and drought-tolerant. This all-rounder variety is perfect for informal edging, low hedges, and wildlife gardens.
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Pruning and fertilising lavender
Lavender is a fragrant, shallow-rooted shrub that is perfect for cottage gardens and borders. It is a hardy plant that does not require much maintenance, but pruning and fertilising at the right time are crucial to keep your plant healthy.
Pruning
Lavender should be pruned regularly to promote denser growth, better flowering, and to reduce the development of leafless woody stems in the centre of the plant. The best time to prune lavender is in the springtime and again after flowering. When pruning in the spring, wait for new leaves to sprout to avoid cutting into the woody section of the plant. Pruning in the spring allows you to shape the plant more easily and encourages more vigorous growth and bushier stems.
After flowering, cut back the plants by one-third to promote fresh leafy growth and more flowers. Most lavenders should be pruned back by two-thirds after flowering to help maintain a bushy growth. If your lavender is showing signs of damage in late winter, cut any broken or cracked stems before spring growth begins and cover any exposed roots with soil.
Fertilising
Lavender is a Mediterranean plant that needs lots of sun and fast-draining soil. It will not survive long in shady, damp, or extremely cold conditions. It prefers poor, dry, or moderately fertile soil, including chalky and alkaline soils. The soil pH should be neutral to slightly alkaline. If the soil is too acidic, increase the pH with Yates Hydrangea Pinking Liquid Lime & Dolomite.
Lavender will need fertilising once every 6 months in late winter or early spring with a controlled-release fertiliser. Once established, lavender is fairly drought-tolerant but will be much healthier if watered regularly. In extended periods of hot and dry weather, lavender will benefit from a good deep watering once or twice a week, but take care not to overwater.
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Pests and diseases
Lavender is a relatively pest-free and disease-free plant. However, it can be susceptible to certain issues, particularly when not grown in ideal conditions.
Pests
Lavender is seldom attacked by pests, but whitefly, aphids, and scale can sometimes be a problem. These sap-sucking pests are also associated with the disease Sooty Mould. Caterpillars have also been known to chew the leaves. To control these pests, you can treat them with sprays such as OCP eco-oil, horticultural oil, or Defender Pyrethrum Insect Spray. Additionally, improving light and air circulation around the plants by removing some of the lower leaves can help manage whitefly, aphids, and scale infestations.
Diseases
When grown in ideal conditions, such as full sun, free-draining calcium-rich soil, and low summer humidity, lavender is generally trouble-free. However, in conditions with higher humidity, lavender can be prone to fungal diseases, commonly root rot, which can cause the death of lower foliage, making the bushes look scraggy. To prevent and manage fungal problems, it is recommended to improve airflow by removing lower branches and applying treatments such as OCP eco-seaweed or Yates Anti-Rot Phosacid Systemic Fungicide.
Additionally, overwatering, heavy and prolonged rain, poor drainage, or clay soil can lead to the plant turning brown, black, or dying.
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Frequently asked questions
Yes, lavender grows in Australia.
Autumn is the best time to plant lavender in Australia, but spring is also an option.
Lavender grows best in full sun with well-drained, slightly alkaline soil. It requires deep, infrequent watering and is drought-tolerant. It prefers hot summers and dry winters but does not do well in high humidity.
English lavender is well-suited to cooler regions of Australia with mild winters. French lavender thrives in warmer regions with hot summers and mild winters. Spanish lavender, with its distinctive 'wing' petals, is a drought-tolerant variety that performs well in dry, Mediterranean climates.
Lavender is a low-maintenance plant that requires minimal care to thrive in Australia. Pruning is essential for maintaining the shape and vigour of the plant, and it should be done just after the flowering season finishes. Lavender does not require frequent fertilisation, but a balanced, slow-release fertiliser can be applied in spring to promote healthy growth.
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