Sustainably grown wasabi rhizomes/ stems. To ensure maximum quality and glucosinalate content, our rhizomes are not harvested until they've reached at least 100g in weight. These come complete with fresh petiole crown. Note: the bottom of your rhizome may have been cut when removed from its mother plant (if grown with multiple rhizomes) or as a weight adjustment.
 
Our rhizomes are 100% fresh, only harvested after receiving your order and definitely never frozen prior to shipping. If the petiole base parts at the top of a rhizome are shrivelled, it's possible the rhizome may have been frozen at some point ...glucosinolate potency will definitely fall off within a very short period of time if this is the case. If your rhizome is in a fresh and healthy state, it should still want to grow and will even push out shoots from the centre of its crown while stored in your fridge, maintaining good glucosinolate levels for a month or more. The condition of the rhizome's crown indicates the quality of your rhizome, withered and shrivelled means compromised quality due to poor storage conditions. For further info re storage of Wasabi see: Article Journal of Food Agriculture and Environment · August 2003