Matt, I hope the plot goes well for you this year, and you get great growing conditions. Common winter rye will grow in the spring, but most of it will not head out, it needs to over winter for that. There are varieties of rye that will head out if spring seeded as well, but they are tough to find and you are not growing rye for grain yield anyhow. I plan to frost seed some Alice white clover next weekend. Unlike haystack, we have 18 inches of snow yet!