When to plant Wormwood in Temperate Australia
Temperate zone — applies to Sydney, Melbourne, Adelaide, Perth, Newcastle and similar areas. Growing elsewhere? Cool · Subtropical · Tropical · Arid.
Raise wormwood seedlings under cover from August to November, surface-sowing the fine seed no deeper than 3 mm and pressing it lightly onto the mix rather than burying it. Germination runs 10–28 days, and plants reach a usable, aromatic size in about 90–120 days. Transplant seedlings out at a generous 60 cm spacing, with rows of 60–90 cm, because a mature wormwood becomes a broad, silvery shrub. This hardy perennial herb sails through frost in Melbourne and Canberra-fringe gardens and asks for little once it is settled in.
Sowing calendar — temperate zone
Green months are your sowing window: August to November.
Growing notes
Wormwood is grown as much for its ghostly silver foliage and reputed pest-repelling scent as for any culinary use, and it is close to unkillable once established. It wants full sun and sharp drainage, thriving in the dry, lean soils that defeat fussier herbs, which makes it well suited to the drier temperate gardens of Adelaide and Perth.
The main failure mode is kindness. Rich soil and heavy watering make wormwood leggy, floppy, and prone to root rot; it genuinely prefers to be a little starved. Plant it in poor, free-draining ground, water sparingly once established, and cut it back hard in late winter to keep a dense, tidy mound.
One thing to know before siting it: wormwood releases compounds that can suppress the growth of nearby plants, so keep it away from vegetable beds and give it its own corner. It pairs better with other tough Mediterranean herbs than with lettuces or beans. Left to its own devices in a hot, dry spot, it will outlive most things in the garden.
Wormwood at a glance
| Sowing depth | 3 mm |
|---|---|
| Plant spacing | 60 cm |
| Row spacing | 60-90 cm |
| Germination | 10-28 days |
| Days to maturity | 90-120 days |
| Frost tolerance | Hardy |
| Method | Plant Seedlings |
Common questions
- does wormwood repel pests in the garden
- Wormwood's strong scent is traditionally used to deter some insects and grazing animals, and dried sprigs are sometimes tucked into cupboards. Its effect on garden pests is modest rather than a cure-all. Grow it for the foliage and scent, and treat any pest benefit as a bonus.
- can wormwood be planted near vegetables
- It is best kept away. Wormwood releases compounds that can inhibit the growth of nearby plants, so give it a separate spot rather than tucking it into a vegetable bed. It sits happily among other tough Mediterranean herbs instead.
- how do you prune wormwood
- Cut it back hard in late winter, before new growth pushes, to keep a dense silvery mound rather than a leggy shrub. A light trim through the season also tidies it. It responds well to firm pruning.
- does wormwood survive frost
- Yes, wormwood is fully hardy and shrugs off temperate frosts, including the sharper cold on the Melbourne and Canberra fringes. It dies back a little in a hard winter but reshoots strongly in spring. Sharp drainage matters more than cold protection.
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