When to plant Mizuna in Perth

Brassica rapa subsp. nipposinica

Mizuna
Mizuna · Brassica rapa subsp. nipposinica

A fast Japanese mustard green for the UK garden. Sow a little at a time, keep the soil evenly moist, and give light shade in heat so plants do not bolt.

30 cm · Full Sun · Moderate Water

Add to garden

Calibrated to Perth · last frost ≈ 9 May

Sow outdoors April to September, harvest May to October. Frost risk October to May.
ActivityJanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecember
Sow outdoorsNoNoNoYesYesYesYesYesYesNoNoNo
HarvestNoNoNoNoYesYesYesYesYesYesNoNo

Growing guide

What to do through the growing season

Growing guide for

Change the guide to see different planting timelines and tips.

Sow small batches outside for a long season of cut-and-come-again leaves. This is the usual UK way to grow mizuna in a bed.

  1. 01

    Sow a small batch

    25 Apr to 4 Sept Optional · repeat every 2 weeks

    Sow thinly around 25th April - 4th September in shallow drills. Cover with of fine compost. Sow a fresh batch every 14 days.

    • Fork in some compost and rake to a fine tilth before you sow.
    • In hot weather, a little light shade and even moisture help stop plants bolting.

  2. 02

    Thin seedlings

    5 May to 9 Oct Dates as each sowing reaches this stage

    After each sowing, once seedlings are large enough to handle, thin to apart. Snip extras at soil level so you do not disturb the roots you want to keep.

  3. 03

    Protect from pests

    25 Apr to 9 Oct

    From 25th April, protect each sowing from slugs as soon as it germinates. Use mesh if flea beetle is pinholing the leaves. Keep this up through 9th October.

  4. 04

    Water regularly

    25 Apr to 9 Oct Dates as each sowing reaches this stage

    After each sowing, keep the soil evenly moist from 25th April through 9th October. Dry spells make plants bolt. Water at the base.

  5. 05

    Harvest leaves

    23 May to 9 Oct Dates as each sowing reaches this stage Optional · repeat every week

    Start picking after each sowing from 23rd May, once baby leaves are big enough to eat. Take outer leaves, or cut about above the soil so the plant resprouts. Keep picking little and often through 9th October.

Companion plants

Tap a plant to see why it works (or doesn't) with Mizuna.

Good companions

Plants to avoid

Why companion planting matters

Companion planting can deter pests, improve pollination, and make better use of space. Some plants confuse pests or attract beneficial insects; others improve soil or offer shade to neighbours that need it.

Suggested varieties

Popular varieties of Mizuna to consider

Mizuna

The standard green form, with finely cut leaves and a mild mustard flavour.

Red Mizuna

A red-tinged selection with the same quick growth and peppery bite.

Kyoto

A common green mizuna type, valued for its neat leaf shape and steady cutting.

Purple Mizuna

A darker ornamental strain that is still good to eat when picked young.

Mizuna guides by town

See how Mizuna timing shifts in other towns with different frost dates.