Mustard Osaka Purple Vegetable Seeds Bulk


  • Spicy, Japanese mustard variety.
  • Suitable as a microgreen or baby leaf.
  • Bulk value packs.
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Mustard Osaka Purple Vegetable Seeds – Bulk & Heirloom

  • A popular choice with chefs.
  • Attractive green leaves with purple highlights.
  • Suitable for microgreens, baby leaf & full maturity.

Growing Instructions (Microgreens)

  • Do not presoak seeds.
  • Sow rate: 28 grams for a 10 x 20″ growing tray.
  • Add 2 – 3 cm of soil or coir peat to tray. Flatten soil to level. Moisten soil. Sprinkle seeds evenly over surface. Lightly water.
  • Cover seeds with a growing tray. Store in a well ventilated, dark spot to germinate. Water 1 – 2 times daily. Keep covered for 2 days.
  • Remove top tray and expose it to indirect light. Water twice daily.
  • Harvest: 8 – 12 days. (Level of difficulty: Easy).
  • A 10 x 20″ growing tray yields approx. 270 grams.

Osaka Purple Mustard (Full Maturity)

  • Fast and easy to grow crop.
  • Use as a salad mix green or leafy vegetable.
  • Suitable for hydroponic growing methods.

Growing instructions

  • Space rows: 45 cm apart.
  • Space plants: 50 cm.
  • Sowing depth: 0.5 cm.
  • Soil temperature: 10-30 °C.
  • Grow in late Spring – Autumn (cool season crop).
  • Hardy, annual variety. Light frost tolerant.
  • Well drained soil. Keep well watered.
  • Part or full sun.
  • Maturity: 45 days. (baby leaf after 25 days).

Product specifications

  • Non-GMO.
  • No chemical treatment.
  • Open Pollinated, heirloom variety.
  • Botanical name: Brassica juncea var. rugosa.
  • Seeds per gram: 250 – 300.
  • We do not ship to WA or Tasmania due to quarantine restrictions.


Seed Germination Guarantee

Seed Guarantee

Our seeds come with a satisfactory germination rate guarantee for 3 months from date of purchase if stored correctly. Store seeds in a cool, dry place (under 10°C) or in an airtight container in the fridge. Do not expose to moisture or direct sunlight, Grains, cereals & pulses should be refrigerated. This warranty is limited to the purchase price only and no further warranty is expressed or implied. Australian consumer protection laws apply to any purchase made with Seedmart Australia.