70 days to maturity. Perilla frutescens. Shiso Herb Seeds (Perilla) - Jeok Ssam IP Seeds. Annual. Perilla is a common Asian herb with the Jeok Ssam IP variety originating from Vietnam. Its leaves are smaller than other varieties, but it makes up for it by packing a big punch of flavor! It is minty and bright with hints of citrus and coriander. It’s easy to see why this herb has been a favorite for centuries. Jeok Ssam IP Shiso can also be grown as an ornamental due to its showy green and reddish-purple leaves. ~ 23,300 seeds / oz.