- Name: Sorghum - Broom Corn Mix - Scientific Name: Sorghum Bicolor - Color: A Mixture Of Red, Burgundy, Black, Brown, Reddish-Brown, Orange, Bronze, Golden, & White - Plant Seeds: Outdoors After Frost / Indoors Weeks Before Last Frost - Harvest: 105 Days - Hardiness Zone: Annual - Plant Height: 8 - 10' - Plant Spacing: 6 - 12" - Light Requirements: Sun - Soil & Water Preferences: Average - Quantity: 50 Seeds - Other: Broom Corn Sorghum Is An Heirloom Variety With Huge 2 - 3 Foot Seed Heads. The Large Showy Seed Heads Are Literally Used For Making Brooms, Or They Are Lovely In Dried Arrangements Or As Holiday Decor. This Mixture Includes All The Lovely Colors Of The Sorghum Rainbow :)