Hamlet, my Allium is not very reliable. I planted bulbs few years ago and got three spikes the first year. The second year it was five spikes and I had hopes that it was forming a clump and would be spectacular in the future. Then last year there were none and I thought they were dead. This year I have two spikes. Perhaps they are very sensitive to weather or perhaps I was rather careless with the spring hoeing. So, if they have suddenly appeared and they haven't been seen before perhaps yours are the same.