Seed Swaps

Japanese mustard spinach

Brassica rapa var. komatsuna

  • 57 plantings
  • 12 for swap
  • 7 wanted
  • 67 stashed

Japanese mustard spinach is part of the Brassica (Mustard) genus and its scientific name is Brassica rapa var. komatsuna.

A type of edible vegetable, it mainly grows as an annual plant - which means it typically only grows best for a single growing season.

Normally grows with a mound-forming habit. This plant tends to bloom in early summer, followed by first harvests in late spring.

Japan is believed to be where Japanese mustard spinach originates from.

Japanese mustard spinach is great for inexperienced gardeners and those that like low maintainance gardens.

This plant info is provided by the myfolia gardener's wiki. All details about Japanese mustard spinach have been kindly provided by our members.

How to grow Japanese mustard spinach

  • Partial Sun

  • Medium

Japanese mustard spinach likes a position of partial sun and remember to water moderately. Use Zone 3 - Zone 14 as your guideline for the appropriate climate for this plant.

See our list of companion Plants for Japanese mustard spinach to see which plants you should plant in close proximity to encourage growth.

Growing Japanese mustard spinach from seed

Try to aim for a seed spacing of at least 2.97 inches (7.62 cm) and sow at a depth of around 0.25 inches (0.64 cm).

Transplanting Japanese mustard spinach

How long does Japanese mustard spinach take to grow?

These estimates for how long Japanese mustard spinach takes to sprout, grow and harvest are from real observations from real gardeners, right around the world.

Start logging and journaling your observations to participate!

Days to Germination How long does it take Japanese mustard spinach to germinate?
5 days

Average 5 days | Min 2 days | Max 15 days (13)

Days to Transplant How long until I can plant out Japanese mustard spinach?
+ 60 days

Average 60 days | Min 60 days | Max 60 days (1)

Days to Maturity How long until Japanese mustard spinach is ready for harvest / bloom?
+ 65 days

Average 65 days | Min days | Max days (0)

Total Growing Days How long does it take to grow Japanese mustard spinach?
= 130 days

Other names for Japanese mustard spinach


Brassica rapa var. pervirdis,Brassica campestris (rapifera group)

Misspellings: komsuna, komtsuna, komasuna


Japanese mustard spinach Forums

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