16 Feb 2019
A wall mounted box with continuously circulated chilled nutrient solution. - submerged pump to circulate water - drip irrigation - peltier cooler to keep water temperature around 50F - gravel media bed - plastic liner - styrofoam insulator - wood casing - plants can get quite large: 1-2 ft tall/wide - planter box must be at least 1 ft deep (might be heavy) - 12-18 months maturation time - aquaponics… too complicated and limited options
- ideal water temperature is 54-59F
- pH 6.0-7.0
- E.C. between 0.03 and 0.2 milliohm per cm
- less than 0.1 ppm ammonia nitrogen and no nitrite-nitrogen
- 2 in sand -> 3 in gravel -> 16-40 in small rocks (3 in diameter)
- each plant requires at least 1/2 sq. ft.
Phosphorus levels in this water range from 0.06 to 2.2 ppm, and potassium levels average between 2.0 and 3.0 ppm. 12-12-12 (N-P-K) is applied to the water at the rate of 0.02 pounds per square foot A foliar application of sulfur is sometimes made 1–3 months before harvest to enhance the flavor of wasabi. planting wasabi so that the crown of the plant is approximately ½ inch above the soil surface (Miles and Chadwick 2008)
Miles, Carol, and Catherine Chadwick. 2008. “Growing Wasabi in the Pacific Northwest.” PNW0605. Washington State University.