I bought purple onions this past spring, from the farm store like I always do. I planted them on time, nearly 300 of them. kept them weeded down until probably the first of august, when I got too busy to keep weeding. some of them I cut off the flower heads, some I didn't. I dug up half a dozen the other day, and they are all still small, even though the tops are dead. what the heck? Last year, they grew just fine.