no longer green

went out back to have a look at the teosinte ears...some were a beige color last time i checked but most were still green...no more..the cold has precipitated the loss of chlorophyll and all but a few ears are an autumn shade of brown...the ears are turning down towards the ground and splitting open in preparation for the seed heads to shatter...so it is time to harvest seed if i am going to...i took in a few ears but plan on leaving a fair number to shatter naturally and seed the ground around the plants just to see if anything comes up in the spring...my plans are for a much larger stand of plants in a different location from the plant site from this past season...but i will take anything that comes up as a volunteer too...now...are these seeds viable? we will be seeing shortly as there will be more peroxide soaking.