Some have better luck than others with return of large alliums. It had been several years since I'd grown any, but got some last year during the end of season sale. In the past I had the same results you saw Terri, but that was in my previous garden where there was more moisture that may have been the issue. This time I've planted them where silver maple tree roots keep things dryer in summer. That situation has been great for some other bulbs that prefer dry dormancy, so we shall see next year.