How to Save Mizuna (Brassica juncea) Seeds

Seed Saving Guide #2719
Family: Brassicaceae
Binomial name: Brassica juncea

Flower Type Perfect, self-fertile
Pollination Self-pollinated and insect pollinated
Isolation Distance 500m
Other Isolation Methods Alternate-day isolation caging
Population Required for Viable Seeds 5
Population Required to Maintain Variety 20-50
When to Harvest When seed pods (siliques) are dry and change colour from green to tan. Mature seeds are light to very dark brown.
How to Harvest

Cut stalks with seed pods over a container or drop cloth to catch any seeds that are released. Spread seed pods on a cloth and leave to dry for 1-5 days. Rub seed pods between hands to break them open and release the seeds.

How to Clean

Screen or winnow to remove remaining stalks and chaff. If further cleaning is needed, roll seeds down a felt-lined ramp; the chaff will stick to the felt and the clean seeds can be collected at the bottom.

Image of Seeds Mizuna (Brassica juncea)

What is Seed Saving?

Seed saving is the practice of collecting and storing mature seeds from open-pollinated plants. By allowing plants to reach full maturity and harvesting the seeds, they can be cleaned, dried, and stored for future use. 

  • To learn the techniques and methods needed to save seeds in your garden, we recommend reading our seed saving series.
  • To view a combined table of all our seed saving guides view our Seed Saving Chart.
  • To browse our seed saving guides individually click here.