Adelaide, SA · Autumn
What to sow, plant, and harvest in Adelaide across March, April, May, the full seasonal list, in the order an almanac would lay it out.
Months
March, April, May
Crops to sow
14
Seedlings to plant
11
Climate
Mediterranean/Temperate
Autumn in Adelaide is the underrated second planting window, brassicas, leafy greens, garlic, broad beans all go in as the heat eases. The city sits in mediterranean/temperate territory, winter lows around 7°C, summer highs around 33°C, and the autumn months (March, April, May) carry a recognisable rhythm that's worth knowing before you plant.
From seed in Adelaide this autumn: Broccoli, Cauliflower, Kale, Spinach, Asian Greens, Carrot, Beetroot, Radish, Garlic, Broad Beans, Peas, Silverbeet, Snow Peas, Turnip. That's a long list, which is the upside of Adelaide's mediterranean/temperate conditions in autumn, direct-sowing into raised beds gives you the best germination and the strongest root systems for the season ahead.
As seedlings in Adelaide this autumn: Tomato (last chance), Lettuce, Silverbeet, Asian Greens, Leek, Broccoli, Cauliflower, Onion, Celery, Cabbage, Brussels Sprouts. Buying seedlings from a local nursery shortens the calendar by 4-8 weeks compared to seed, which matters most in Adelaide's shoulder windows.
Harvesting in Adelaide this autumn: Tomato, Capsicum, Eggplant, Zucchini (last), Beans, Sweet Potato, Tomato (final), Capsicum (last), Pumpkin, Broccoli (early), Broccoli, Lettuce, Asian Greens, Silverbeet, Radish, Carrot (early). The harvest peak runs across the season's middle month, when warm-season crops planted in the previous shoulder are coming into full production.
Adelaide's extreme summer heatwaves (40°C+) can kill vegetable plants within hours, keep shadecloth on hand and water deeply the day before forecast heatwaves. The Adelaide Hills is its own microclimate, if you garden above 400m, treat your conditions more like Canberra and expect frosts from June to September. If you want the printable, see the full Adelaide planting calendar.
Adelaide's autumn suits raised beds for the simple reason that raised beds drain faster and let you control the bed mix, both of which matter when the season's weather extremes try to either drown or bake your crops. The raised bed calculator sizes the bed; the companion planting guide fills it out.
For the month-by-month read, see the full Adelaide planting calendar. To convert this season's list into an exact bed plan for your household, Plant Planner reads your postcode, your bed dimensions, and your family size and does the maths.
Sow from seed
Plant as seedlings
Harvest
In Adelaide's autumn (March, April, May), you can sow from seed: Broccoli, Cauliflower, Kale, Spinach, Asian Greens, Carrot, Beetroot, Radish, Garlic, Broad Beans, Peas, Silverbeet. From seedlings: Tomato (last chance), Lettuce, Silverbeet, Asian Greens, Leek, Broccoli, Cauliflower, Onion, Celery, Cabbage.
Across Adelaide's autumn months, you'll be harvesting: Tomato, Capsicum, Eggplant, Zucchini (last), Beans, Sweet Potato, Tomato (final), Capsicum (last), Pumpkin, Broccoli (early), Broccoli, Lettuce, Asian Greens, Silverbeet.
The strongest autumn performer in Adelaide depends on what you already grow, but high-yield, low-effort choices include Tomato (last chance), Lettuce, Silverbeet. The full crop-by-crop guides are linked above.
Frost risk in Adelaide: Frost-free (plains), light frosts July-August in Hills. Frost is less of a concern in this season, heat protection and irrigation matter more.
Tell us your postcode and your bed size. We’ll lay it out, size it for your household, and email reminders the weekend before each task.
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