Wasabi
Eutrema japonicum
A stream-edge Japanese brassica. Real wasabi is a grated rhizome that fades in minutes. Most grocery ‘wasabi’ is horseradish plus dye. Hard to grow — cool, wet, shaded.
GROW → HARVEST → EAT → DRY → POWDER → CAPSULE → GUMMY — forms are not equivalent. Food first.
Identity
Also called: Japanese horseradish
What it is
A stream-edge Japanese brassica. Real wasabi is a grated rhizome that fades in minutes. Most grocery ‘wasabi’ is horseradish plus dye. Hard to grow — cool, wet, shaded.
Edible portions
- rhizome, grated fresh
Absence of a portion from this list means it is not treated as food here — not that every other part is toxic.
Growing
- Climate. Cool, 8–10 stream culture or specialized beds
- Light. Shade, cool, moving water or very even moisture
- Soil. Specialized wet, well-oxygenated media
- Planting. Not a windowsill chili. Buy real rhizome if you find it, or enjoy horseradish honestly.
Preparation and culinary uses
- Grate against sharkskin or a fine grater at the table
Nutrition and compounds
- Plant compounds. allyl isothiocyanate. Presence is not a dose, a cure, or a reason to buy a capsule.
AAA interpretation Food first. These associations explain why a plant shows up in a nutrient conversation — they are not a supplement shopping list.
Next steps
Sources
- USDA PLANTS Database — taxonomy and range (verify current entries)
- USDA FoodData Central — nutrient profiles for foods (verify current entries; this page does not invent milligrams)
- State cooperative extension growing guides — verify for your region
Honest incompleteness is preferred to fabricated completeness. If a section is missing, no record for it is attached here — not a claim that the plant lacks that characteristic, and not that it was omitted as a secret.
Internal quality class A. Strong page: distinctive plant facts plus practical growing or kitchen use.