Howdy, Julie; thanks for your inquiry. Those appear to be woodpecker holes. Very uniform and consistent with damage caused by pecking action. AgriLife Extension wildlife division offers an article on controlling woodpeckers online, and best to catch their activity early in development to effectively control their activity. Online: https://agrilifeextension.tamu.edu/library/wildlife-nature-environment/controlling-woodpecker-damage/. Thanks again for the inquiry, and see you in the garden.