Eutrema japonicum (Wasabi Plant, Japanese Horseradish)

How to grow Eutrema japonicum (Wasabi Plant, Japanese Horseradish) in NZ

Eutrema japonicum grows best in cool sheltered conditions with filtered light or dappled shade. In New Zealand it prefers consistently moist, rich soil with excellent drainage. Avoid direct hot afternoon sun as this can scorch the leaves. Regular watering is essential, especially in warmer regions, to keep the soil evenly moist. It performs well in containers where moisture and drainage can be carefully controlled.

Eutrema japonicum (Wasabi Plant, Japanese Horseradish) care tips

Wasabi Plants require consistent moisture and protection from heat stress. Feed lightly with a balanced fertiliser during spring and summer to encourage steady growth. Remove any yellowing leaves to maintain plant health and airflow. Protect from heavy frost and extreme heat, as both can damage foliage and reduce rhizome quality. Patience is required, as plants typically take many months to develop harvestable rhizomes.

Eutrema japonicum (Wasabi Plant, Japanese Horseradish) size, spacing, and growth rate

Eutrema japonicum (Wasabi Plant, Japanese Horseradish) typically grows to around 30 to 50 centimetres tall and wide, forming a clump of broad leaves. Space plants approximately 30 to 40 centimetres apart to allow for airflow and rhizome development. Growth is moderate under ideal cool conditions. It may take 12 to 18 months before the rhizome reaches a suitable size for harvest.

Landscaping uses for Eutrema japonicum (Wasabi Plant, Japanese Horseradish)

Eutrema japonicum (Wasabi Plant, Japanese Horseradish) is ideal for shaded kitchen gardens, cool woodland style plantings, and container growing on sheltered patios. Its lush foliage adds texture and contrast in damp shaded areas where other edibles may struggle. Use it alongside leafy greens and other shade tolerant crops. It is particularly suited to gardeners wanting to grow specialty edible plants at home.

Why buy Eutrema japonicum (Wasabi Plant, Japanese Horseradish) from The Plant Company?

When you purchase Eutrema japonicum (Wasabi Plant, Japanese Horseradish) from The Plant Company, you are choosing NZ’s most trusted plant nursery. Our plants are grown and selected for strength, health, and suitability to New Zealand conditions. We provide expert advice on positioning and care to help you succeed. With careful packaging and reliable nationwide delivery, you can buy with confidence and enjoy premium quality plants every time.