When to plant Yarrow 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 yarrow seedlings from August to September and transplant them out once established, surface-sowing the tiny seed no more than 1 mm deep since it needs light to germinate. Expect sprouting in around 10 days and flowering plants within 90–100 days. Space transplants 60 cm apart in rows 30–60 cm wide. This tough, hardy perennial is well matched to arid gardens in Alice Springs and Broken Hill, coping with dry heat and poor soil once its roots are down, though the fine seed needs gentle handling at the start of the cool-season window.
Sowing calendar — arid zone
Green months are your sowing window: August to September.
Growing notes
Yarrow is one of the easier perennials for a dry inland garden, but the seed stage trips people up. Because the seed is tiny and needs light to germinate, it must sit on the soil surface or be barely dusted over; bury it and nothing comes up. Press it into moist seed-raising mix, keep it lightly damp with a fine mist, and it germinates quickly, often in about 10 days.
The main failure mode after that is pampering. Yarrow evolved for lean, dry conditions, so rich soil and frequent watering make it flop, grow leggy and flower poorly. Plant it into ordinary or even sandy soil, water it to establish, then back right off. Once settled it draws on deep roots and needs only occasional deep watering through the hottest Kalgoorlie summers.
Give plants their full 60 cm because yarrow spreads by rhizomes and clumps up over the seasons; crowding invites poor airflow. It flowers reliably in flat white or coloured heads that pull in hoverflies, ladybirds and other beneficial insects, which makes it a useful companion at the edges of vegetable beds. Cut spent flower stems back to encourage a second flush and to stop it self-seeding everywhere. Divide congested clumps every few years in the cool season to keep them vigorous.
Yarrow at a glance
| Sowing depth | 1 mm |
|---|---|
| Plant spacing | 60 cm |
| Row spacing | 30-60 cm |
| Germination | 10-10 days |
| Days to maturity | 90-100 days |
| Frost tolerance | Hardy |
| Method | Plant Seedlings |
Common questions
- How do you germinate yarrow seed?
- Surface-sow it no deeper than 1 mm because it needs light to sprout. Press the seed onto moist seed-raising mix, keep it lightly damp, and it usually germinates in about 10 days. Do not bury it or germination fails.
- Is yarrow drought tolerant in hot climates?
- Yes, it is very drought-hardy once established and suits dry inland gardens like Alice Springs and Kalgoorlie. It prefers lean soil and infrequent deep watering. Overwatering and rich soil make it flop and flower poorly.
- Why is my yarrow floppy and not flowering?
- Too much water or overly rich soil is the usual cause. Yarrow wants lean, dry conditions and full sun. Cut back on feeding and watering, plant it in poorer soil, and it will grow sturdier and flower better.
- Does yarrow attract beneficial insects?
- Yes, its flat flower heads draw hoverflies, ladybirds and other beneficials, so it makes a useful companion planted at the edge of vegetable beds. Leaving some flowers to bloom through the season supports pest-eating insects in the garden.
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