For best results, plant into a 9cm (3”) pot to establish a good root system for 4-5 weeks and harden off before planting out.
Hardy down to –5ºC, protect plants on cold nights with some straw or horticultural fleece covering the crown of the plant. Provide plenty of shade in the early stages of growth.
When planting outside the soil should be fertile and free draining. Wasabi dislikes sitting in water for extended periods. If planting into a container, use a 9L pot.
Plant so the crown of the plant is not covered and remains slightly above the soil, allowing new leaves to emerge unhindered.
Once established wasabi is easy to care for, just keep slugs and aphids away and remove any dead leaves.
Keep the soil moist and feed with a general-purpose plant food.
Leaves may yellow in the sun, so provide more shade if you notice this happening, plus they’ll die back in winter and should be removed.