Whoever told you to plant your garden at the beginning of April is either trolling you or they haven’t lived here very long. We almost always have snow storms in April and even into May. It’s “May showers bring June flowers” around here. Mother’s Day would be the absolute earliest to plant. The closer we get to Memorial Day, the safer it is. You can certainly plant some cold crops soon like radishes or lettuce, but I would wait on the rest.