Osaka Purple Mustard
Osaka Purple Mustard: 21-40 days to harvest, 4-7 days to germinate, 4-6 inches between plants, pH 6.0-7.5, hardy in zones 8-9. Fruit runs to about 4-6 inch leaves. Give it full sun to partial shade (4-6+ hours) and high water. It will crop in a container.
Sowing
Direct sow 2-4 weeks before last frost. Succession plant every 2-3 weeks. For fall crop, sow 8-10 weeks before first fall frost.
Cultivation
- Sun
- Full sun to partial shade (4-6+ hours)
- Water
- High — consistent moisture needed
- Soil
- Rich, well-drained soil with good organic matter
- Soil pH
- 6.0-7.5
- Spacing
- 4-6 inches
- Height
- 12-18 inches
- Season
- Fall, Winter and Spring
Appearance & flavour
- Colour
- Deep purple leaves with bright green stems and veins
- Size
- 4-6 inch leaves
- Shape
- Broad, flat leaves with scalloped edges
- Flavour
- Mild mustard flavor when young, becoming more peppery and pungent as leaves mature
In the kitchen
Baby greens for salads, microgreens, stir-frying, braising, adding color to mixed greens
Pests, disease & resistance
- Pests
- Flea beetles, aphids, cabbage worms
- Diseases
- Downy mildew, white rust, black rot
- Resistance
- Good bolt resistance in cool weather
Planting calendar by USDA zone
| Zone | Start indoors | Transplant | Direct sow | Harvest |
|---|---|---|---|---|
| 1 | April – May | June – July | June – July | July – September |
| 2 | April – May | June – July | May – July | June – September |
| 3 | March – April | May – June | May – June | June – October |
| 4 | March – April | May – June | April – June | May – October |
| 5 | February – March | April – May | April – May | May – November |
| 6 | February – March | April – May | April – May | May – November |
| 7 | February – March | April – May | March – May | April – November |
| 8 | January – February | March – April | March – April | April – December |
| 9 | January | February – March | February – March | March – December |
| 10 | January | February – March | January – March | February – December |
| 11 | January | January – February | January – February | January – December |
| 12 | January | January – February | January – February | January – December |
| 13 | January | January – February | January – February | January – December |
Companion planting
8 beneficial pairings indexed for this variety, 3 to avoid.
Avoid
Nutrition (per 100 g)
- Calories (per 100 g)
- 31
- Protein (g)
- 2.57
- Fat (g)
- 0.34
- Carbohydrate (g)
- 6.27
- Fibre (g)
- 2.4
- Vitamin A (µg)
- 8
- Vitamin C (mg)
- 91.3
- Vitamin E (mg)
- 0.15
- Vitamin K (µg)
- 102
- Vitamin B6 (mg)
- 0.191
- Folate (µg)
- 65
- Calcium (mg)
- 46
- Iron (mg)
- 0.69
- Magnesium (mg)
- 21
- Phosphorus (mg)
- 67
- Potassium (mg)
- 303
- Zinc (mg)
- 0.42
- Selenium (µg)
- 1.6
Where to buy seed and equipment
Some links are affiliate links. If you buy through them we may earn a commission at no extra cost to you.
Cultivar facts compiled from public horticultural references including USDA GRIN and NC State Extension. Descriptions are original to this catalogue.
Grown Osaka Purple Mustard?
Post a crop report — day counts, reservoir readings, what worked. Variety-specific logs are the most useful thing on the forum.
Similar varieties
Other brassicas with a comparable time to harvest, so a season that suits Osaka Purple Mustard suits these too.
- Mizuna 21 days
- Tokyo Bekana 21 days
- Arugula 'Rocket' 20 days
- Charbell 28 days
- Ruby Red or Rhubarb Chard 32 days
- Purple Top Turnip 37 days