MIST IRRIGATION CULTURE OF "TEIREGI" (CARDAMINE REGELIANA MIQ.)^©

“Teiregi” (Japanese bittercress; Cardamine regeliana Miq.) is a wild vegetable in Matsuyama. Tomitaro Makino (2010) mentioned that in 1944, teiregi was sold in vegetable stores during December in Matsuyama. At present, we can scarcely find it in vegetable stores but can find it occasionally on some restaurant signboards.
Teiregi is cultured in a waterway from the Joh-No-Fuchi pond consists of spring water (Fig. 1). But, growth has become worse lately, perhaps the cause is water quality deterioration by fish and waterfowl.
Teiregi is a perennial herb that grows all year round in the spring water; in the case of common culture, flowering in spring and then dies in summer. We tried mist irrigation culture, as culture method independent of spring water.
In this culture experiment, nursery plants were propagated by micropropagation, because one of the common weed, C. flexuosa, a related species to teiregi in the experiment area.