Hi Jen,
Not a dumb question. Here in lovely Zone 4, we leave them in the ground year after year to multiply and bloom for years. I believe alliums need a chill period like tulips and daffs to bloom. Globemaster is a great allium to grow. I would consider it even with the extra chilling work.
Sally

I'm in zone 6 and love ornamental alliums but they seem to peter out after a couple of years. As I hear about them multiplying in other gardens, I wonder what I am doing wrong. I don't water my garden except in extreme drought so it isn't that.

Globemaster has the rep of lasting only a couple years here. It is pricey also. cathy

I've planted alliums, but the flowers are never as large as the catalog photos look like, whats the deal? I love those huge blue balls of flowers.

if left to go to seed do these seeds germinate and grow and flower?

Debbie