When to plant Poppy in Temperate Australia

Temperate zone — applies to Sydney, Melbourne, Adelaide, Perth, Newcastle and similar areas. Growing elsewhere? Cool · Subtropical · Tropical · Arid.

Sow poppies direct in February and March, scattering the dust-fine seed onto the surface and barely covering it at 3 mm. Germination is slow at 14–28 days, and being hardy the plants sit through winter before running to flower over a long 140–150 days, blooming in spring. Poppies hate transplanting, so always sow where they are to grow, thinning to 20–30 cm apart with 15–30 cm between rows. In Melbourne and Adelaide gardens this autumn sowing gives the classic drift of spring poppies that a spring sowing rarely matches.

Sowing calendar — temperate zone

Green months are your sowing window: February to March.

Growing notes

Field poppies are hardy annuals best sown direct in autumn, in February and March, so the young plants overwinter and flower in spring. Because the seed is extremely fine, the reliable method is to mix it with a little dry sand and scatter thinly over prepared ground, then barely rake it in. Do not bury it; a light 3 mm covering is plenty.

The long lead time is normal. Between slow 14–28 day germination and the 140–150 day run to flower, poppies test your patience, but the autumn sowing is what delivers the strong spring display. Sowing in spring instead usually gives weaker, shorter-lived plants that flower briefly before summer heat ends them.

Poppies resent root disturbance absolutely, which is why they are never transplanted. Thin seedlings in place to 20–30 cm rather than moving them. Keep the bed weed-free early, as the small seedlings are easily swamped, and water gently so you do not wash the surface-sown seed away. Once flowering, leave a few seed heads to dry and shatter and poppies will self-sow through Perth and Newcastle gardens for years. Cut flowers for the vase at the point the bud is just splitting and sear the stem ends to make them last.

Poppy at a glance

Common questions

when do you sow poppies in temperate Australia

Sow direct in February and March so plants overwinter and flower in spring. This autumn sowing gives a far stronger display than a spring start. Expect slow germination of 14–28 days and a long 140–150 day run to flower.

can you transplant poppy seedlings

No, poppies resent root disturbance and rarely survive transplanting. Always sow them direct where they are to flower and thin the seedlings in place to 20–30 cm apart. This is why the seed is never raised in trays.

how do you sow fine poppy seed evenly

Mix the dust-fine seed with a little dry sand and scatter it thinly over prepared ground, then barely cover it at 3 mm. Water gently so you do not wash the surface seed away. Even sowing avoids dense clumps of seedlings.

do poppies come back every year

Field poppies are annuals but self-seed readily if you leave a few seed heads to dry and shatter. In temperate gardens they will return year after year from dropped seed. Thin unwanted seedlings as they appear.

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