*Reproduction – Garter snakes are viviparous and can be bred from two to three years of age. They may breed twice a year. Litter sizes usually number 10 to 30 (although much higher are recorded). The young are born in the late summer and average over 20 cms in length. The young eat frequently to fatten up before the winter hibernation. | *Reproduction – Garter snakes are viviparous and can be bred from two to three years of age. They may breed twice a year. Litter sizes usually number 10 to 30 (although much higher are recorded). The young are born in the late summer and average over 20 cms in length. The young eat frequently to fatten up before the winter hibernation. |