This winter I am sowing siegle or rye (secale cereale) in my apothecary garden. It will be useful as a green manure covering the ground over winter, cleaning the soil and fixing nitrogen. In the spring I can feed it to my guinea pigs and cook it for my dogs.
I buy mine from Graines del Pais - a local, organic seed producer. They do mail order (in french) and I highly recommend them