Maple Pea Seeds. Pisum sativum. Annual. 70 to 90 days to full maturity, 8 to 12 days for microgreens. Non-GMO, Open Pollinated, Heirloom. Maple pea is a popular variety grown for microgreens and garnish. The shoots have a nice pea, sweet flavor. Soak seeds in cold water 12-24 hours. Sow seeds by broadcasting in soil tray and tamp into soil. Lightly cover with soil. ~ 100 seeds / oz.