When to plant Aquilegia in Arid Australia

Arid zone — applies to Alice Springs, Mildura, Broken Hill, Kalgoorlie, Port Augusta and similar areas. Growing elsewhere? Temperate · Cool · Subtropical · Tropical.

Raise aquilegia (columbine) from seedlings sown in August and September, then transplant, giving this cottage perennial its cooler-season start in the desert. Surface-sow the fine seed just 3 mm deep, as it needs light, and expect slow, uneven germination over 14–28 days. Aquilegia takes 190–220 days to reach flowering, so a late-winter start brings blooms into the milder shoulder of the year rather than the peak of summer. Space plants 30–40 cm apart in rows 30–40 cm apart. In Alice Springs and Mildura, treat it as a partly shaded, well-watered plant and it will reward you with its distinctive spurred flowers.

Sowing calendar — arid zone

Green months are your sowing window: August to September.

Growing notes

Aquilegia is frost-hardy and actually benefits from a cold spell, which arid winters supply through their sharp desert nights. The challenge is the other end of the year: this is a woodland-edge plant that resents relentless summer heat and dry air.

Seed germination is the first hurdle. The seed needs light, so surface-sow at no more than 3 mm and keep it damp; some gardeners in Kalgoorlie and Broken Hill chill the seed in the fridge for a couple of weeks first to improve the strike. Be patient, as 14–28 days is normal and cool trays germinate better than warm ones.

Once planted out, the main failure mode is summer scorch. Site aquilegia where it gets morning sun and afternoon shade, mulch heavily, and never let the root zone dry out. Plants that sail through spring can crisp badly in a January heatwave, so a shaded, irrigated position is worth the effort. Deadhead to prolong flowering, but leave a few seed heads late in the season, because aquilegia self-seeds and the volunteers often prove tougher and better adapted to your garden than the parents.

Aquilegia at a glance

Common questions

Can columbine grow in a hot dry climate?

Yes, with care. Aquilegia is frost-hardy and enjoys the cold desert nights, but it dislikes summer heat, so give it afternoon shade, heavy mulch and steady moisture to carry it through the hottest weeks.

How do I get aquilegia seed to germinate?

Surface-sow at 3 mm because the seed needs light, keep it damp, and be patient over the 14–28 day germination. A couple of weeks of cold in the fridge before sowing often improves the strike.

When will aquilegia flower after sowing?

It takes 190–220 days to reach flowering, so an August or September sowing brings blooms into the milder shoulder of the year rather than peak summer heat.

Does aquilegia come back each year?

It is a short-lived perennial that also self-seeds freely. Leave a few seed heads to ripen and you will get volunteer plants that are often better adapted to your local conditions than the originals.

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