Important variables in aquatic production include temperature, clarity, oxygen saturation and nutrient status of the water. Indications have been that Daruma and Daruma Improved will be suitable for Australian conditions. There is very little material available at this stage in Australia for commercial use. It is hoped that several new varieties will be available in late 1997 for further assessment. Agronomy Wasabi is easily stressed and the best times to plant are most likely autumn and spring when temperatures are moderate.
Autumn is preferred as it naturally follows on from seedling production.
The Soil culture. Once a site has been chosen it needs to be cleared of weeds entirely and shade needs to be constructed, taking into account any machinery that may need to be used within the shade structure such as tractors or irrigators. This means that the shade structure design should allow good air-flow for cooling. Leaving the lower section open up to around half a metre would help to provide additional ventilation and cooling. Ideally the shade structure for soil grown wasabi should be simple for easy relocation.