What to Plant in Your Adelaide Garden in Autumn

Written by Susan – Plant Lover, Adelaide

Here's something most gardeners don't realise: autumn is the best time to plant in Adelaide. Not spring. Not summer. Autumn.

The logic is simple. When you plant in March, April, or May, your new plants get a full cool season to establish their roots before facing their first Adelaide summer. By the time the heat hits in December, your plants have 6–7 months of root development behind them. Compare that to spring planting, where a new plant faces its first scorching January just 3–4 months after going in the ground.

Here's what to plant right now to make the most of Adelaide's best planting season.

🌳 Trees: Autumn Is Prime Time

Deciduous trees and most feature trees transplant most successfully in autumn because the tree is heading into dormancy (or slowing down) and doesn't have the energy demands of a full canopy.

• 🍂 Liquidambar Styraciflua — Plant now for stunning first-autumn colour. These establish beautifully over winter and hit the ground running in spring.

• 🍂 Ornamental Pear (Pyrus Calleryana) — Autumn planting means spring blossom arrives right on schedule in your first year.

• 🍂 Jacaranda Mimosifolia — Autumn is ideal. Establishes over winter and spring, then delivers that iconic purple canopy in its first summer.

• 🍂 Crepe Myrtle (Lagerstroemia) — Autumn or winter planting is the preferred method for best results in Adelaide.

• 🍂 Acer Truncatum x Platanoides 'Ruby Sunset' — Brilliant autumn colour right from the first season — a stunning feature tree for Adelaide gardens.

🌿 Hedges & Screening: Plant Now, Screen by Spring

Hedge plants put on their most vigorous root growth in the cooler months. Autumn-planted hedges arrive at spring looking established and ready to grow.

• 🟢 Lilly Pilly (Syzygium Australe 'Backyard Bliss') — Autumn-planted Lilly Pillies will flush beautifully with new growth in spring. This is the best time to establish a new hedge.

• 🟢 Viburnum Odoratissimum — Ideal autumn planting. Flowers in winter while roots establish strongly.

• 🟢 Photinia Fraseri Robusta (Red Robin) — Autumn planting gives it a long establishment period before the first summer heat.

• 🟢 Westringia Fruticosa 'Grey Box' — Reliable year-round planting, but autumn establishment reduces first-summer watering demands significantly.

🌺 Natives: Autumn Is Their Season

Australian native plants are evolved for a Mediterranean climate — autumn rain, cool winters, and dry summers. Autumn is almost always the best time to plant them.

• 🌿 Grevillea — Autumn planting timed to coincide with the first autumn rains. Flowers often appear in the first winter.

• 🌿 Callistemon Viminalis 'Wildfire' (Bottlebrush) — Establishes beautifully over autumn and winter. Spring brings the first flower flush.

• 🌿 Lomandra longifolia & Dianella Caerulea 'Breeze' — Clumping natives that establish with minimal care when planted in autumn.

• 🌿 Westringia Fruticosa 'Grey Box' & Correa pulchella 'Dusky Bells' — Native coastal and garden shrubs that thrive in autumn planting.

🌱 Groundcovers: Cover the Ground Before Summer

Autumn-planted groundcovers spread through winter and spring, meaning by December they're already doing the job of shading soil and reducing evaporation.

• 🟢 Myoporum parvifolium 'Yareena' — The ultimate Adelaide groundcover. Plant in autumn and it will spread 30–50cm in its first season.

• 🟢 Scaevola aemula 'Touch Blue' (Fan Flower) — Spreads vigorously over winter and spring. Stunning blue flowers through the warmer months.

• 🟢 Dianella Caerulea 'Breeze' (native flax lily) — Hardy, low-maintenance grass alternative that establishes perfectly in autumn.

💡 Autumn Planting Tips for Adelaide

• ✅ Water in well on planting day — even if rain is forecast. This removes air pockets around the root ball.

• ✅ 2 deep soaks per week for 8 weeks — then reduce as winter rain takes over.

• ✅ Mulch immediately — 7–10cm keeps soil temperature stable and reduces autumn watering.

• ✅ Don't fertilise at planting — wait until spring when plants are actively growing. Autumn fertilising can encourage soft growth that gets hit by unexpected frosts.

💚 Final Thoughts from Susan

"If I could give one piece of advice to every Adelaide gardener it would be: plant in autumn. The results speak for themselves — plants that go in now will look 12 months ahead of equivalent spring-planted specimens by the following Christmas. Our winter rainfall does most of the work for you."

Browse our full range or use the category menus to find the perfect plants for your autumn project. As always, we're here to help if you need advice.