Komatsuna
Brassica rapa var perviridis
A vegetable, sown April to October.
In September: sow another batch of komatsuna and pick a few of its leaves at a time. It can be sown under cover or sown outdoors now.
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Komatsuna, month by month
Bar: the usual months. Sprout: this month.
| Sowing, planting or job | Sep | Oct | Nov | Dec | 2027Jan | Feb | Mar | Apr | May | Jun | Jul | Aug |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sow under cover. | usual | none | none | none | none | none | none | usual | usual | usual | usual | usual |
| Sow outdoors. | usual | usual | none | none | none | none | none | usual | usual | usual | usual | usual |
| Protect the komatsuna over winter. | none | none | none | usual | usual | usual | none | none | none | none | none | none |
| Sow another batch of komatsuna. | usual | usual | none | none | none | none | none | usual | usual | usual | usual | usual |
| Pick a few komatsuna leaves at a time. | usual | usual | usual | none | none | none | none | none | none | none | none | none |
What to do, and when
The usual months for a UK garden. Your own plan gives the week.
Sowing and planting
Sow under cover April to September, 1cm deep. Moderate source: Kings Seeds. Weaker source for the depth: Grown Local.
Sow outdoors April to October, 2.5cm deep, 25cm apart. Moderate source: Kings Seeds. Weaker source for the spacing: Grown Local.
Plant out, 20 to 50cm apart. Moderate source: Kings Seeds.
Protect the komatsuna over winter
Under a cloche it keeps giving cut-and-come-again leaves through winter. From RHS.
Usually December to February. Moderate source: Kings Seeds.
Sow another batch of komatsuna
Gardeners call this successional sowing.
Sow again every 21 days.
Usually April to October. Moderate source: Kings Seeds.
Pick a few komatsuna leaves at a time
Gardeners call this cut-and-come-again harvesting.
Usually September to November. Moderate source: RHS.
What the source words mean
Moderate: another trusted UK source, or the RHS on its group.Weaker: a blog, a forum, a small website or a page from outside the UK. Treat it as a guide.
Every line above names the page it comes from. Where we found no good source for a job, we left it out. Where the name “Komatsuna” comes from.