How to Grow Mizunas Canada
On this page
Sow mizuna once soil temperature reaches 4°C.
The short answer
- Site
- soil pH 5.5–6.8
- Biggest risk
- White blister
Core growing advice on this page is checked against named horticultural sources — see References.
Mizuna (Brassica rapa subsp. nipposinica)
3 sources cited · Verified
Quick Facts
| Factor | Value |
|---|---|
| Soil pH | 5.5 - 6.8 |
| Germination temp | 4°C |
| Soil texture | chalk, clay, loam or sand (RHS) |
| Drainage | well-drained |
| Lifecycle | biennial, harvested in its first year as a fast-growing compact plant |
| Edible parts | leaves |
| Documented problems | 3 diseases, 3 pests |
At a Glance
Diseases
Pests
Soil & Growing Conditions
Water: moist but well-drained; prefers cooler conditions especially in summer (RHS)
Soil pH range
Span reflects genuine variation between the cited authorities, not a single agreed figure.
Growth Stages
| Stage | BBCH | Notes |
|---|---|---|
| Sowing | 0 | Sow in spring about two weeks after the last frost, or again near end of summer for autumn/winter harvest; germinates in 4-7 days at 45-85°F (Harvest to Table). |
| Establishment | 3 | Fast-growing compact rosette to about 20cm; full sun or part shade, moist well-drained soil (RHS). |
| Baby leaf harvest | 8 | Pick baby leaves 4-6 weeks after germination once 4-6in tall (Harvest to Table). |
| Mature harvest | 8 | Leave to 6-8 weeks for fuller heads; slow to bolt in hot weather, very cold-hardy into winter (Harvest to Table, RHS). |
Harvest & Storage
When to pick: Baby greens from 4-6 weeks after germination, once leaves reach 4-6in tall; fuller heads at 6-8 weeks (Harvest to Table). Very cold-hardy, harvestable well into winter under row covers or cold frames.
Plan your Mizunas planting
When to sow and plant Mizunas depends on your own frost dates. Check the Canada vegetable planting calendar. To work out where it fits in your beds, sketch your plot in the free Garden Layout Planner.
Growing Mizuna in another region
Sowing dates, frost timing and local advice differ by country. Use the guide for where you garden.
Sources
The full list of 3 sources behind this guide (Harvest to Table, Royal Horticultural Society, Useful Temperate Plants) is in the references of our UK guide to mizuna; they describe the plant itself, which is the same wherever it grows.
Frequently Asked Questions
What soil pH does mizuna need?
A pH of about 5.5–6.8. That span reflects genuine variation between the authorities we cite rather than a single agreed figure — the References section lists each source's exact range.
What problems affect mizuna?
Our data links 3 diseases and 3 pests to this crop. See the sections above for each one and how to manage it.
Plan next season before the problems start
Short-season growing is arithmetic before it is technique: days to maturity against frost-free days decides what will finish at all. The Canada Garden Planner does that subtraction for your region before you sow.
Get the Canada Garden Planner →Instant PDF download · Written for Canadian growing conditions
How this guide is put together
The growing data on this page — sowing windows, pests, diseases, soil and site requirements — comes from named horticultural sources, listed in References below, checked against Canadian hardiness-zone and frost-date data, with provincial agriculture and university extension sources cited directly where one exists for a crop. An automated pipeline assembles that verified data into the page you're reading: it selects which facts to lead with and builds the surrounding prose and layout. It does not invent a date, a source or a number — where a verified value for a field isn't available, the page leaves it out rather than guessing. A person reviews and publishes each page; nothing goes live unverified.
Vegetable Growing Guides Canada
Related Problem Guides
Last verified 2026-08-29
Mizunas in the month-by-month guides
The Canada month guides that include mizunas:
More from the same group (brassicas & mustards):
Growing advice for your part of Canada
Timing and conditions change a lot inside one country. These guides cover frost dates and growing seasons region by region.
Where To Go From Here
Take this crop from reading into a written plan for your own beds.
Keep going
Plan the next step
Use the printable SoilCommander planner for your region to turn this guide into sowing dates, bed layouts and weekly garden tasks.