{"product_id":"wasabi-seeds-for-planting-150","title":"Wasabi Seeds (Eutrema japonicum) – 150 Seeds","description":"\u003ch2\u003eWasabi Seeds: A Practical Guide to Starting a Cool-Climate Crop\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWasabi seeds for planting, listed as 150 seeds of \u003cem\u003eEutrema japonicum\u003c\/em\u003e\u003c\/strong\u003e, also known as Japanese wasabi or Japanese horseradish. This listing is for planting seeds, not ready-to-eat wasabi paste, mature stems, or live plants. \u003cstrong\u003eThe 150-seed count and species name are the current listing information; physical packet count, seed-lot identity, cultivar and freshness have not been independently authenticated.\u003c\/strong\u003e Keep the packet label and request lot-specific instructions from the supplier before applying any pretreatment.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQuick answer:\u003c\/strong\u003e Wasabi is a demanding, moisture-loving perennial that prefers a cool environment, deep shade and an organic-rich medium that drains well. Seed dormancy is a major challenge. Washington State University (WSU) reports that cold, moist stratification helped particular cultivars, but its recommended duration cannot be assumed to work for an unidentified retail seed lot. Plan a small, labeled germination trial instead of promising quick sprouting.\u003c\/p\u003e\n\n\u003ch2\u003eQuick Facts: What Is Known and What Needs Verification\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eAttribute\u003c\/th\u003e\n\u003cth\u003eGardening guidance\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eListed product\u003c\/td\u003e\n\u003ctd\u003e150 wasabi planting seeds; packet quantity pending physical verification\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eListed botanical name\u003c\/td\u003e\n\u003ctd\u003e\n\u003cem\u003eEutrema japonicum\u003c\/em\u003e, also widely listed as \u003cem\u003eWasabia japonica\u003c\/em\u003e; lot identity not independently verified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePlant family\u003c\/td\u003e\n\u003ctd\u003eBrassicaceae, the mustard family\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePlant habit\u003c\/td\u003e\n\u003ctd\u003eCool-season, herbaceous perennial when conditions allow\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLight\u003c\/td\u003e\n\u003ctd\u003eHeavy shade or filtered light; WSU describes approximately 50–80% shade for outdoor nursery production\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature\u003c\/td\u003e\n\u003ctd\u003eCool conditions; WSU describes roughly 43–68°F (6–20°C) for field production, with risk increasing in hot conditions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGrowing medium\u003c\/td\u003e\n\u003ctd\u003eOrganic-rich, airy and moisture-retentive with reliable drainage\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMoisture\u003c\/td\u003e\n\u003ctd\u003eConsistent moisture and humidity, avoiding saturated stagnant roots\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSuitable location\u003c\/td\u003e\n\u003ctd\u003eProtected shaded containers, cool nursery beds or specialized greenhouse conditions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeed pretreatment\u003c\/td\u003e\n\u003ctd\u003eMay require cultivar-dependent cold, moist conditions; obtain supplier guidance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUnverified lot details\u003c\/td\u003e\n\u003ctd\u003eActual cultivar, harvest date, storage history, treatment, purity, germination test, certifications and seed count\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhy Wasabi Is Different From an Ordinary Herb-Garden Seed\u003c\/h2\u003e\n\u003cp\u003eTrue wasabi naturally grows in cool, shaded, water-influenced habitats. A sunny kitchen windowsill that works for many herbs can be too hot for wasabi seedlings. WSU documents field, nursery and semiaquatic production systems, while Utah State University (USU) recommends heavily shaded, organic-rich growing conditions. Those publications explain the species; they do not establish what is inside this particular retail packet.\u003c\/p\u003e\n\u003cp\u003eWasabi's root-zone moisture requirement is easy to misunderstand. The plant wants regular moisture and humid surroundings, but waterlogged potting soil can encourage rot. A pot with functioning drainage, breathable medium and a cool shaded position is a more sensible first trial than a sealed, permanently flooded container.\u003c\/p\u003e\n\u003cp\u003eWasabi can take a long time to become an established crop. USU notes roughly two years to harvest mature stems under appropriate conditions, beginning with established plants. \u003cstrong\u003eThat is not a harvest promise for seeds or a timeline for this lot.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch2\u003eEight Steps for a Careful Wasabi Seed-Starting Trial\u003c\/h2\u003e\n\u003ch3\u003e1. Confirm what the packet says\u003c\/h3\u003e\n\u003cp\u003eRead the physical label for the scientific name, harvest or packed-on date, storage instructions and any treatment directions. Record the supplier, lot number and date you received it. If the packet provides no growing protocol, request one before starting all the seeds. Flower or leaf images alone cannot prove cultivar, seed freshness or botanical origin.\u003c\/p\u003e\n\n\u003ch3\u003e2. Plan a small trial before using the whole pack\u003c\/h3\u003e\n\u003cp\u003eDivide only a modest portion into a labeled test batch so that you can observe its response. Reserve the remainder according to the supplier's recommended storage conditions. Seed viability may have been affected before delivery; no lot test or germination percentage is available for this listing.\u003c\/p\u003e\n\n\u003ch3\u003e3. Check whether dormancy treatment is appropriate\u003c\/h3\u003e\n\u003cp\u003eWSU describes cold stratification near \u003cstrong\u003e41°F (5°C) for approximately two months\u003c\/strong\u003e as successful in studies of the named ‘Daruma’ and ‘Shimane’ cultivars. Its publication also emphasizes that requirements differ among cultivars. Treat this as a documented research example, \u003cstrong\u003enot an automatic treatment instruction for unidentified seeds\u003c\/strong\u003e. Match any chilling method to the supplier's lot-specific directions, and keep the treatment date separate from the sowing date in your notes.\u003c\/p\u003e\n\n\u003ch3\u003e4. Prepare a cool, free-draining seed-starting setup\u003c\/h3\u003e\n\u003cp\u003eUse a clean nursery container with drainage holes and an airy, organic-rich propagation medium. WSU describes a loose mix and careful irrigation in a sheltered nursery environment. Pre-moisten the medium so water does not displace small seeds during sowing. Avoid a dense, sealed pot or stagnant tray of water.\u003c\/p\u003e\n\n\u003ch3\u003e5. Sow using the verified lot guidance\u003c\/h3\u003e\n\u003cp\u003eFollow the packet or supplier for depth and timing. If no reliable instructions exist, avoid assuming that generic vegetable-seed depths apply. WSU's published nursery-box procedure gives one method used in wasabi propagation, but its results are tied to the seed and environment studied. Label the tray and document the chosen method so you can assess the outcome rather than guessing afterward.\u003c\/p\u003e\n\n\u003ch3\u003e6. Protect from direct sun and heat\u003c\/h3\u003e\n\u003cp\u003ePlace the tray in a protected, cool setting with filtered light. WSU describes substantial shade for wasabi seedlings and greater disease and leaf-burn problems when conditions become hot or exposed. Do not leave covered trays in direct midday sunlight. Monitor the actual temperature near the seedlings instead of relying only on the outdoor weather forecast.\u003c\/p\u003e\n\n\u003ch3\u003e7. Maintain moisture without suffocating roots\u003c\/h3\u003e\n\u003cp\u003eCheck the surface regularly and water gently enough to keep the medium evenly moist while allowing excess water to drain. Good airflow helps avoid a persistently stagnant environment. If growth stalls or seedlings collapse, examine temperature and drainage as well as watering frequency; giving more water is not always the solution.\u003c\/p\u003e\n\n\u003ch3\u003e8. Transplant only vigorous, established seedlings\u003c\/h3\u003e\n\u003cp\u003eWait until seedlings have developed adequate leaves and roots to handle moving. WSU's nursery guidance describes moving established plants to shaded beds as they mature, with timing depending on their development. Keep the crown properly positioned, protect new transplants from sun and extreme temperatures, and continue tracking growth. Do not promise any fixed time to germination or mature harvest for this untested lot.\u003c\/p\u003e\n\n\u003ch2 id=\"rike-wasabi-winter-seeds-vs-plants-20261023\"\u003eCan wasabi grow beside a spring-fed stream in a freezing winter?\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eDo not confuse cold treatment for seed germination with frost tolerance in established plants.\u003c\/strong\u003e A home gardener in New York's Finger Lakes region asked \u003ca href=\"https:\/\/ask.extension.org\/kb\/faq.php?id=225895\"\u003eAsk Extension on January 28, 2015\u003c\/a\u003e whether a shaded spring-fed stream could support wasabi through freezing winters, and whether some varieties tolerate cold better. The original response referred the grower to local Cornell Cooperative Extension rather than confirming a hardiness rating. This is one observed grower question, \u003cstrong\u003enot\u003c\/strong\u003e measured demand or proof of this seed lot's cultivar.\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/pubs.extension.wsu.edu\/product\/growing-wasabi-in-the-pacific-northwest\/\"\u003eWashington State University Extension's growing guide\u003c\/a\u003e describes cool-condition wasabi cultivation and notes frost damage can occur when air temperature falls below approximately \u003cstrong\u003e27°F (-3°C)\u003c\/strong\u003e. Offshoots may sometimes survive when the central stem is damaged, but that is not a promise that a young plant or unknown cultivar will overwinter. \u003ca href=\"https:\/\/extension.usu.edu\/yardandgarden\/research\/wasabi-in-the-garden\"\u003eUtah State University Extension\u003c\/a\u003e recommends protecting plants from winter cold, and moving potted wasabi to a cool, diffusely lit indoor location in colder areas.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eWhat you have\u003c\/th\u003e\n\u003cth\u003eWhat the cold means\u003c\/th\u003e\n\u003cth\u003eNext decision\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eDry or dormant planting seeds\u003c\/td\u003e\n\u003ctd\u003eWSU describes a moist-chilling study near 41°F for two months in named cultivars; the response is cultivar- and treatment-dependent\u003c\/td\u003e\n\u003ctd\u003eVerify the supplier lot and any pretreatment history before running a small labeled seed trial\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNewly emerged seedlings\u003c\/td\u003e\n\u003ctd\u003eYoung plants are vulnerable to freezing, drying and abrupt temperature changes\u003c\/td\u003e\n\u003ctd\u003eUse a sheltered, cool, drained nursery setup; do not equate refrigeration of seeds with exposure of seedlings to outdoor frost\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEstablished wasabi in a pot\u003c\/td\u003e\n\u003ctd\u003eCool temperatures suit growth, but hard freezing and prolonged heat can injure the plant\u003c\/td\u003e\n\u003ctd\u003eMonitor actual lows at plant level and plan a protected, cool indoor location in cold-winter regions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShaded streamside planting\u003c\/td\u003e\n\u003ctd\u003eCool moving water may help summer conditions but does not establish winter hardiness or prove safe water quality\u003c\/td\u003e\n\u003ctd\u003eCheck local conditions, runoff, irrigation and growing legality before trying a controlled planting; do not introduce seeds to an unmanaged natural waterway\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eBuyer fit:\u003c\/strong\u003e This offer lists \u003cstrong\u003e150 wasabi planting seeds\u003c\/strong\u003e, not cold-hardy plants or a cultivar-certified transplant. Its lot freshness, cultivar, treatment and germination have not been verified. For a fuller practical climate comparison, see our existing \u003ca href=\"https:\/\/therike.com\/blogs\/how-to-diy\/wasabi-is-a-cool-shade-stream-bank-plant-not-a-windowsill-bonsai-herb-for-hot-patio-gardeners\"\u003ewasabi shade, summer heat and winter protection guide\u003c\/a\u003e. Treat the planting as an experiment with an exit plan for frost, not a guaranteed harvest.\u003c\/p\u003e\n\u003ch2\u003eCommon Wasabi Problems and How to Investigate Them\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eWhat you observe\u003c\/th\u003e\n\u003cth\u003eCheck first\u003c\/th\u003e\n\u003cth\u003eReasonable next step\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eNo seedlings after sowing\u003c\/td\u003e\n\u003ctd\u003eLot freshness, possible dormancy, actual temperatures, moisture and chosen treatment\u003c\/td\u003e\n\u003ctd\u003eCompare with supplier guidance; keep labeled trial notes before attempting a different protocol\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLeaves scorch or wilt in sunlight\u003c\/td\u003e\n\u003ctd\u003eExposure to direct sun and hot air\u003c\/td\u003e\n\u003ctd\u003eIncrease shade and cool the growing environment; check roots and soil moisture too\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYellowing, weak or collapsing seedlings\u003c\/td\u003e\n\u003ctd\u003eDrainage, excessive saturation and stale air\u003c\/td\u003e\n\u003ctd\u003eImprove airflow and drainage; avoid keeping containers standing in water\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSlugs or snails chew leaves\u003c\/td\u003e\n\u003ctd\u003eUndersides of leaves and protected damp corners\u003c\/td\u003e\n\u003ctd\u003eInspect regularly, remove pests appropriately and keep the nursery tidy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGrowth pauses during winter or summer\u003c\/td\u003e\n\u003ctd\u003eExtremes of cold or heat\u003c\/td\u003e\n\u003ctd\u003eMove container-grown plants to a more stable protected setting where practical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eAre these 150 live wasabi plants?\u003c\/h3\u003e\n\u003cp\u003eNo. The listing describes \u003cstrong\u003eplanting seeds\u003c\/strong\u003e. The number 150 is the stated seed count and still needs verification against the supplied packet.\u003c\/p\u003e\n\u003ch3\u003eWill the seeds germinate in a fixed number of days?\u003c\/h3\u003e\n\u003cp\u003eNo fixed germination interval is supported for this lot. Wasabi dormancy, seed freshness, pretreatment and temperature all matter. Published propagation results for named cultivars are useful references but are not a performance guarantee.\u003c\/p\u003e\n\u003ch3\u003eDo all wasabi seeds need two months in a refrigerator?\u003c\/h3\u003e\n\u003cp\u003eNot necessarily. WSU discusses approximately two months at 41°F for particular cultivars. The treatment may differ for another cultivar or for seeds that have already been treated. Obtain supplier instructions for the actual batch.\u003c\/p\u003e\n\u003ch3\u003eCan I grow wasabi in a regular garden pot?\u003c\/h3\u003e\n\u003cp\u003eA shaded, well-drained container may work as a trial if the location stays cool and consistently moist. Hot, dry locations require special protection. A pot itself does not resolve the plant's climate needs.\u003c\/p\u003e\n\u003ch3\u003eIs this a certified organic, heirloom or non-GMO seed lot?\u003c\/h3\u003e\n\u003cp\u003eNo such certification is verified in the available product record. Do not infer it from a generic product photo or a species description.\u003c\/p\u003e\n\u003ch3\u003eIs wasabi the same as standard horseradish?\u003c\/h3\u003e\n\u003cp\u003eNo. True wasabi is generally described as \u003cem\u003eEutrema japonicum\u003c\/em\u003e (also \u003cem\u003eWasabia japonica\u003c\/em\u003e), while standard horseradish is a different species. Check the seed-lot label to confirm the item actually supplied.\u003c\/p\u003e\n\n\u003ch2\u003eSources and Limits of This Guide\u003c\/h2\u003e\n\u003cp\u003eThis guide applies published cultivation information to a \u003cem\u003elisted\u003c\/em\u003e wasabi seed product. It cannot establish seed authenticity, quantity, testing, treatment history or performance without supplier and lot records. The material is written for gardeners and does not include a seed-lot germination guarantee.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/pubs.extension.wsu.edu\/product\/growing-wasabi-in-the-pacific-northwest\/\"\u003eWashington State University Extension: Growing Wasabi in the Pacific Northwest\u003c\/a\u003e. Cultivar differences, seed propagation, shade, temperature and irrigation.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/extension.usu.edu\/yardandgarden\/research\/wasabi-in-the-garden\"\u003eUtah State University Extension: Wasabi in the Garden\u003c\/a\u003e. Soil, climate, shade and container care.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/plants.ces.ncsu.edu\/plants\/eutrema-japonicum\/\"\u003eNC State Extension Gardener Plant Toolbox: Eutrema japonicum\u003c\/a\u003e. General plant identification and cultivation reference.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Seeds Small envelope ( $2 shipping charge customer","offers":[{"title":"Default Title","offer_id":47036336308542,"sku":"POIIOPOI - NEW","price":9.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0154\/3713\/5926\/files\/growing-wasabi-seeds-novel-challenge-802.webp?v=1719494926","url":"https:\/\/therike.com\/products\/wasabi-seeds-for-planting-150","provider":"The Rike","version":"1.0","type":"link"}