- Developed in Oklahoma by Carl Barnes as a way of reconnecting with his Cherokee heritage the Glass Gem Ornamental Corn produces rainbow kerneled ears that are individually unique.
110 days. The Glass Gem variety of corn was developed by Carl Barnes, a farmer from Oklahoma, as a way of reconnecting with his Cherokee heritage. The Glass Gem seeds produce ears of colorful, rainbow kernels. Each ear is entirely unique. This crop does best with full sun, in grow zones three to eleven.