Lavender — How to Grow Lavender in Australia

☀️ Sun

Full Sun

💧 Water

Low

↔ Spacing

60cm apart

↕ Height

Up to 90cm

📅 Harvest

180 days

Growing Guide

Planting: The best time to plant lavender in Australia is spring (September to November) or early autumn (March to April), when temperatures are mild and roots can establish before extreme heat or cold arrives. Avoid planting in the peak of summer.

Soil Preparation: Lavender demands excellent drainage above all else. Amend heavy clay soils generously with coarse sand, perlite, and gritty gravel. Raise garden beds if needed. Lavender prefers a slightly alkaline to neutral pH of 6.5–7.5. Incorporate a small amount of lime if your soil is acidic.

Watering: Water regularly for the first 6–8 weeks after planting to help establishment. Once established, lavender is highly drought-tolerant — water deeply but infrequently, approximately every 2–3 weeks in summer. Overwatering is the most common cause of lavender failure in Australian gardens. Always allow the soil to dry between waterings.

Feeding: Feed sparingly. A light application of slow-release low-phosphorus fertiliser in early spring is sufficient. Avoid high-nitrogen feeds, which promote lush foliage at the expense of flowers and fragrance.

Harvesting: Harvest flower spikes just as the buds begin to open, in the morning after dew has dried. Cut stems long for drying. Regular harvesting encourages fresh growth and prolongs flowering. Avoid cutting into old woody stems when harvesting.

🤝 Good Companions

Lavender pairs wonderfully with roses salvias catmint (Nepeta) and echinacea — these companions share similar sun and drainage preferences while creating a pollinator-rich visually stunning cottage garden display. Lavender's strong scent also helps deter aphids and other pests from neighbouring plants making it a genuinely protective companion.

❌ Avoid Planting With

Avoid planting lavender near moisture-loving herbs such as mint basil or camellias as their high water requirements create soggy soil conditions that will quickly cause lavender roots to rot. Plants that prefer acidic nutrient-rich soils are also poor neighbours as the growing conditions required are fundamentally incompatible.

🐛 Pests & Diseases

Lavender is generally robust in Australian gardens, but root rot caused by Phytophthora fungus is the most serious threat, typically triggered by poor drainage or overwatering — improve soil structure and reduce irrigation as the primary organic remedy. Lavender can occasionally attract spittlebugs and aphids, which can be controlled with a strong jet of water or a spray of diluted neem oil. Grey mould (Botrytis) may appear in humid coastal regions during wet seasons; improve airflow by spacing plants adequately and pruning after flowering.

🌱 Fertilising

Apply a light top-dressing of low-phosphorus, slow-release granular fertiliser (such as a native or low-P blend) once in early spring to support the new season's growth and flowering. Avoid over-fertilising — excess nutrients, particularly nitrogen, reduce the essential oil content, weaken fragrance, and cause floppy, disease-prone growth in Australian conditions.

✂️ Pruning & Training

Prune lavender twice yearly in Australia — once lightly after the first spring flush fades, and again more firmly in late summer or early autumn (March) to shape the plant and remove spent flower spikes. Always cut back into the green leafy growth and never prune into old bare wood, as lavender will not regenerate from leafless stems.

🔬 Propagation

Lavender is most reliably propagated from semi-hardwood cuttings taken in late summer to early autumn — select 8–10 cm non-flowering shoots, strip the lower leaves, dip in rooting hormone, and insert into a free-draining propagating mix of perlite and coarse sand. Seed propagation is possible but slow and variable in quality, so cuttings are strongly preferred for maintaining the characteristics of named cultivars.

🗓 When to Plant

Spring Summer Autumn Winter

🌾 Harvest

Spring Summer

🌏 Australian Climates

Mediterranean Temperate Cool Temperate Arid

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