Allium is the onion family. My decorative allium are blooming right now. They tend to show up after the daffodils, early tulips and hyacinth have all wilted and just before my bigger iris shoot up bloom spikes.
The orb-shaped head is actually a cluster of many individual little purple flowers.
They look just like a larger version of a chive flower. They should be planted like other bulb flower, in fall for spring-time blooms. They need little in the way of division, are adaptable to different soils and hardy to zones 3 or 4. The decorative ones don’t give off anything in the way of an oniony smell. They are great for cutting and my globemaster had to be since it bent right over on its 30″ stalk. (I think it had help) I’m just glad that it’s the first year I actually go a bloom from it. Previous years it sent up a bud shoot only to be killed off by frost. They take a while to open but once they do their unique bloom adds an ethereal note to any perennial bed. Definitely a good one to try.