To the best of my knowledge the tubers you receive from me are true to name and disease free. The tubers are guaranteed to have one "eye". If you have a problem with a tuber, please let me know as soon as possible. I cannot be responsible for failure of a tuber due to poor growing conditions or gardening practices. When your dahlias arrive please inspect the tubers to make sure your order is correct. Guarantee is valid for the current growing season.