When to plant Wallflower 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 wallflower seedlings and transplant from March to August, sowing the seed around 6 mm deep and allowing 14–21 days for germination in cool conditions. Wallflowers are hardy and take a long time — roughly 180 days — to reach their scented spring display, so autumn sowings in Alice Springs and Broken Hill mature to flower as the cool season closes. Space transplants 20–30 cm apart with rows 25–30 cm apart in full sun and free-draining, limed soil. Their strong perfume and warm colours make them a classic cottage flower well suited to the long, cool desert winter.

Sowing calendar — arid zone

Green months are your sowing window: March to August.

Growing notes

Wallflowers are a slow, patient crop that rewards an early start: from autumn sowing to flower is close to six months, so the plants spend winter building up before their scented spring show. Raise seedlings under cover and transplant into full sun, giving them the sweet, well-drained soil they prefer — a dose of garden lime helps on acid ground, and good drainage is essential because they rot in cold, wet feet.

The most common failure in arid gardens is losing plants over winter to soggy soil or, at the other extreme, letting the display run into spring heat that cuts flowering short. Plant into raised or improved ground so water drains away, and time the sowing so the flowering flush lands in the cool weeks before Mildura and Port Augusta warm up in earnest.

Pinch out the growing tips of young plants to encourage a bushier habit with more flowering stems rather than a single spike. Water steadily but never keep the crown wet, and mulch to buffer the swing between hot days and cold nights. As biennial-type plants they can be short-lived in the heat, so treat them as an annual display, enjoy the perfume through spring, and pull them out once flowering finishes and the plants tire in the warmth.

Wallflower at a glance

Common questions

when to sow wallflowers in arid gardens

Raise wallflower seedlings and transplant from March to August. Because they take around 180 days to flower, an early autumn start is important so the scented display lands in cool spring weather.

why did my wallflowers rot over winter

Wallflowers hate cold, wet soil around their roots and rot readily in it. Plant into raised or well-improved, free-draining ground, add some lime on acid soil, and avoid keeping the crown wet.

how long do wallflowers take to flower

Wallflowers are slow, taking roughly 180 days from sowing to flower. Sow in autumn so the plants establish over winter and bloom in spring before arid heat arrives.

should I pinch out wallflower seedlings

Yes, pinching the growing tips of young wallflowers encourages a bushier plant with more flowering stems. Do it while plants are still small for the best branching.

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