Wasabi (Wasabia japonica) packet of 10 seeds, organic

$7.95

Fresh harvest from 2019 now in stock!

Family: Mustard (Brassicaceae)

Hardy to Zones 7 to 12

Herbaceous perennial native to mountain streams of Japan.  Our variety is MAZUMA, which is one of the main types–beautiful, vigorous and HOT.  This is the true wasabi. These cold-stored seeds must be planted in potting soil, about 1/2 inch deep, and mulched with coir or peat, and placed in COOL MOIST SHADE (not soaked in water or in running water or hydroponic setup, etc.) Germination of this summer or fall planted seed is in the very early spring. By March, the seedlings will have formed 2 sets of true leaves and its time to pot them up.  In colder climates, where the propagation beds may be frozen hard, germination will occur later, usually in April or perhaps as late as May. Please note that hard freezing of the germination beds or flats may prove to be harmful for the seed, so if winter temperatures go below 20 degrees F (Zone 7), greenhouse culture is advised. Plant prefers aquaculture or shaded beds of compost, misted daily. Space plants 1 foot apart.

10 Seeds per packet, Certified Organically Grown

Note: No replacements on wasabi seed. International sales now OK!

In stock

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  1. Question

    Patrick C.

    It will take about a month before i get the seeds since i’m in another country, will the seeds still germinate?

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    • Richo Cech

      Richo Cech

      The wasabi is dried sufficiently to remain stable in storage and in shipment. The seeds will germinate if the right conditions are provided.

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  2. Question

    Doc

    Are these wasabi or horse radish . I’m looking for wasabi

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    • Richo Cech

      Richo Cech

      They are wasabi. Horse radish doesn’t make seeds.

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  3. Question

    JDJ

    Mr. Richo . . . I want to buy these seeds today but I’m going out of town Tuesday. Would they survive six weeks waiting to be planted or must they be planted immediately?

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    • Richo Cech

      Richo Cech

      Hello JDJ,
      I suggest you buy them when you get back in town. They can be stored, but in the refrigerator is best, and they can be planted anytime from now until fall. r

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    • Richo Cech

      Richo Cech

      Please wait until you get back. We’ll have plenty to fulfill your needs on into fall.

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  4. Question

    SHARON KOSKI

    HELLO WHEN DO YOU EXPECT THESE SEEDS TO BE AVAILABLE?

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    • Richo Cech

      Richo Cech

      Hi There,
      Wasabi seeds are sold from fresh crop only. Last year the first pods came ripe on May 4th. r

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    • Richo Cech

      Richo Cech

      May 2019

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    • Robert Lee Lei

      It would be great to see you making the wasabi beds, as well as hearing your advice and insight on growing that variety of wasabi! Do you have a youtube channel?

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    • Richo Cech

      Richo Cech

      Hello, Yes, here’s the link to the youtube channel, there is indeed a video on wasabi. https://www.youtube.com/strictlymedicinalllc
      Richo

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    • Juliet

      Kindly advise when you get them, need them here in south africa, email julietmuchavhaira@yahoo.com

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    • Richo Cech

      Richo Cech

      OK, will do. r

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  5. Question

    Scott Sultzbaugh

    Hello! I am interested in wasabi seeds. I know they should be coming into season soon and wondering about your availability. I fyou could contact me please.

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    • Richo Cech

      Richo Cech

      OK, will do, was building wasabi beds yesterday and today. it will be awhile. r

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  6. Question

    Brett Riske

    What type of Wasabi is this? Should I assume Daruma? Just trying to do my research. Thanks, Brett

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    • Richo Cech

      Admin Richo Cech

      Mazuma

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    • Gabriella

      Hey. Is there some wasabi seeds to buy?
      I would like buy 50-100 pieces.
      What is the process to buy and send them to Boston?
      Thanks a lot, Gabriella

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    • Richo Cech

      Admin Richo Cech

      Hello Gabriella,
      I think you’re familiar with fresh seed requirement on Wasabi. The mother plants are not in flower yet, they will make seeds around April of 2019 and we will enable packets at that time. Please check back!
      Richo

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  7. Question

    Becky Hering

    When will the seeds be available again?

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    • Richo Cech

      Admin Richo Cech

      these come ripe around june or so and will be enabled for purchase at that time, until they run out. richo

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  8. Question

    Liv

    Hi
    I am wondering when your wasabi seeds will be available again 🙂

    Thankyou

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    • Richo Cech

      Admin Richo Cech

      Fresh seed is essential and the new harvest begins April of 2019.

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    • Mike

      Sales of seeds will begin in April? Can they be pre ordered? Also what size are your plants?

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    • Richo Cech

      Admin Richo Cech

      Hello Mike, Yes, seeds are produced round-about April. We will enable purchase when we see the pods forming. Plants are in 4 inch pots and have currently made many smaller leaves around the crown, which is what they do in the autumn. The front and center photo online is meant to be representative of the actual plant we sell. During the summer, the same plants were 18 inches tall. Plants vary in size according to the season, we aim to provide a plant that will work well for you, which to the nurseryperson translates to: a vigorous root. Richo

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  9. Question

    Nathan

    When will the seeds become available?

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    • Richo Cech

      Admin Richo Cech

      We’re currently filling backorders on these and will enable the item again if we have extra seed. Check back 6/30/2018.

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  10. Question

    Judy

    I live in Southern California. Upon receipt of the wasabi seed, can I plant it right away outside where it is ( day time) 65-75′ Fahrenheit? Is it too hot to grow wasabi outdoors? How many hours of sunlight does it need?

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    • Richo Cech

      Admin Richo Cech

      Hello Judy,
      Thanks for getting in touch with us. Upon receipt of the wasabi seed, you probably cannot successfully plant it right away outdoors. It takes about 8 months to germinate, and by then your spot would probably be weeded up. at 65 to 75 degrees F it is not too hot to grow wasabi. The plant requires shade, not sun, and standard temperate daylength is fine. Here are some notes pasted from the directions we have given: These cold-stored seeds must be planted in potting soil, about 1/2 inch deep, and mulched with coir or peat, and placed in COOL MOIST SHADE (not soaked in water or in running water or hydroponic setup, etc.) Germination of this summer or fall planted seed is in the very early spring. By March, the seedlings will have formed 2 sets of true leaves and its time to pot them up. In colder climates, where the propagation beds may be frozen hard, germination will occur later, usually in April or perhaps as late as May. Please note that hard freezing of the germination beds or flats may prove to be harmful for the seed, so if winter temperatures go below 20 degrees F (Zone 7), greenhouse culture is advised. Plant prefers aquaculture or shaded beds of compost, misted daily.
      Bottom line, at this time of year, buy plants. They are in very good shape right now and will soon be ready to ship. This will assure your success.

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  11. Question

    Kristy

    How well could these be grown potted indoors, at least to start? I have zonal heating, so it wouldn’t be exposed to 70F+ room temp. I was thinking in the bathroom window where it would get misted daily from the shower steam? Thanks

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    • Richo Cech

      Admin Richo Cech

      Unless you have a shadehouse setup, at this current writing, approaching spring, I suggest getting the plant instead of trying seeds. You can grow it indoors, it loves shade, high humidity, moderate temperatures.

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  12. Question

    jushin8848

    Hello there.

    I am writing form South Korea, and much interested in growing Wasabi, I got some question.
    1. Could you tell me the that what is maximum temperature of air and water during summer. hope you could share your knowledge about Wasabi growing.
    coz in Korea we have very hot summer weather around 35 C degree.
    Thank you so much for your kind reply in advance.

    Best regards.
    Shin.
    jushin8848@gmail.com

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    • Richo Cech

      Admin Richo Cech

      Hi Justin,
      We can try to send seeds to South Korea but cannot guarantee receipt. Wasabi grows best at temperatures between 10 to 16 degrees C. Temperatures below 6 degrees C slow growth, and the plant may die off if temperatures dip lower than -2 degrees C. Water temperature should test between 7 and 15 degrees C. Use shade cloth or lath to create shade and reduce temperature.

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  13. Richo Cech

    Admin Richo Cech

    Large roots can be produced in a single year by starting early, keeping the bed protected from frost.  Most growers wait 2 to 3 years before harvesting roots that range from 4 to 8 inches long.  Plant prefers part shade at the edge of cool running water or a shaded and misted garden bed.  We set our misters for 2 cycles daily, 10:00 and 2:00, for only 10 minutes each cycle.  The beds stay soaked.  Our greenhouse plants are in full flower by February, and begin to make seed in May.  These seeds we sell are harvested from our own plants and kept refrigerated.  Upon receipt, our cold stored seed is best planted immediately in cool, moist, shady conditions (in pots or flats left outdoors, in the shade house or a shady spot in the unheated greenhouse).  We have received many correspondences from people trying to plant their seeds in streams or in baby pools.  This is not likely to give any results at all. 

    Germination note.  Due to many inquiries for more quantitative information on Wasabi seed germination, we took careful notes in the year 2012/13.  The seed was planted on 6/20/2012 and germinated on 2/08/2013, an induction period of 199 days.  The germ rate was 98%.  RAC 

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    • Luke

      Hello, Are you sure you dont have any Wasabi seeds left?

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    • Richo Cech

      Admin Richo Cech

      Actually we do but they tend not to last very long so we are waiting for the new harvest to list them. Should be late spring 2019. Richo

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