Japanese herbs The mixture contains fast-growing spice seeds with 15 different types of seeds. The mixture can be grown in pots, trays, 1m2 bed, in the garden. The mixture is used to season salads, meat, fish dishes, some varieties in the mixture can be dried. Grows best in a sunny spot, in soil that is permeable to water and air. To have these plants throughout the season, we recommend sowing the mixture several times.