105-119 days. Ornamental Broom corn seeds grow tall 48-72" multicolored seeded grass stalks that have been used throughout the world to produce countless goods including food, crafts, spirits, and brooms. Broom corn seeds are an ideal grow amongst sunflowers because they also produce an edible seeded kernel favorited by many birds. Multicolored broom corn is traditionally grown outdoors as a simple and unique highlight along a property or sown wildly in any open space. Ornamental broom corn seeds are a wonderful addition for long-lasting seasonal ground cover up until the frost.