45 Days to maturity. Artemisia princeps. Yomogi Japanese Mugwort Seeds. Non-GMO perennial heirloom. Yomogi, or Japanese Mugwort, is an easy-to-grow perennial herb that grows in almost any condition. It is flavorful, mixing a mild bitterness with an earthy sweetness. It’s commonly used as a medicinal herb for boosting energy, as a natural treatment for stomach aches, and as a colonic. There are a number of recipes that use Yomogi, all of which are also used as herbal remedies. Approx 9,300 seeds / oz.