Most wheat straw plates have a life span of about 3-5 years. However, this will depend on how often you use them and how you care for them. If you use them daily, they will probably only last a few months. But if you only use them occasionally and take good care of them, they could last several years.To extend the life of your wheat straw plates, avoid putting them in the dishwasher or microwaving them. Instead, wash them by hand in warm soapy water and air dry or pat dry with a clean towel. Also, store them in a cool, dry place out of direct sunlight when not in use.