- Soil requirements: Wasabi plants prefer rich, well-draining soil with a pH level between 6.0 and 7.0. The soil should be kept consistently moist but not waterlogged. Adding organic matter such as compost can improve soil texture and fertility.
- Sunlight needs: Wasabi plants thrive in partial to full shade. They require protection from direct sunlight, which can scorch the leaves and hinder growth. A shaded area or dappled sunlight is ideal.
- Watering requirements: Wasabi plants need consistent moisture. Water them regularly to keep the soil evenly moist, but avoid waterlogging. Drip irrigation or a soaker hose can help maintain the right moisture levels.
- Planting season: The best time to plant wasabi seeds is in the spring or fall when temperatures are cooler. Wasabi plants prefer temperatures between 45°F and 75°F (7°C to 24°C).
- Depth and spacing: Plant wasabi seeds about 1/4 inch deep in the soil. Space the seeds or seedlings about 12 to 18 inches apart to allow for adequate growth and airflow.
- Germination time: Wasabi seeds typically take 10 to 14 days to germinate under optimal conditions. Keep the soil consistently moist and maintain a temperature of around 55°F to 65°F (13°C to 18°C) for best results.
- Maturity time: Wasabi plants take about 18 to 24 months to reach full maturity. The rhizomes are the most valuable part of the plant and require patience to develop fully.
- Harvesting time: The best time to harvest wasabi is in the late fall or early winter when the plant is around 18 to 24 months old. Harvesting in cooler weather helps maintain the quality of the rhizomes.
- Harvesting tips: Use a sharp knife or garden fork to carefully dig up the wasabi rhizomes. Clean them thoroughly and store them in a cool, dark place. Wasabi rhizomes can be grated fresh or stored in the refrigerator for up to a month. For long-term storage, consider freezing the rhizomes.