130 Days to maturity. Gossypium hirsutum. Mississippi Brown Cotton Seeds. Non-GMO, open-pollinated, heirloom cotton seeds. Annual in zones 8-11. It may be grown in zones 6-7 if started indoors and protected from cool weather. This drought and heat-tolerant cotton plant produces beautiful brown bolls. The cotton produced is a gorgeous deep golden brown color highly sought after for eco-conscious textile production. The variety dates back to the pre-1860s.