Fava beans and Barley are hardy in zones 7-10. Wheat is hardy down to zone 5.
The gluten-free grains (sorghum and teff) are summer cover crops.

Cover Crops that are Food Crops

Bell Beans (Small Favas)
$3.50 - $8.50
$3.50 - $8.50

Only a few left!

Fava Beans (Broad Beans)
$3.50
$3.50
Agricultural Mustard
$3.50
$3.50
Danjo Mugi Hulless Barley
$3.50
$3.50
Syrian Hulless Barley
$3.50
$3.50
Teff
$3.50
$3.50
Winter Field Peas
$3.50 - $11.00
$3.50 - $11.00

Only a few left!

Tibetan Blue Barley
$3.50
$3.50
Arabian Blue Hulless Barley
$3.50 - $8.00
$3.50 - $8.00
Fast Lady Northern Southern Pea
$3.80
$3.80
Cardoon
$3.50
$3.50