My Allium 'Galdiator' did multiply. although not all of the new babies flower the first year. 'Globemaster' does multiply as well. The flowers get smaller in subsequent years. They do not like wet feet at all. Therefore, keep them on the dry side and definitely plant them in very well drained areas.

Allium aflatunenese & hollandicum 'Purple Sensation', moly,sphaerocephalon also make good cut flowers. Allium pulchelum and albopilosum might makegood cut flowers too, but I guard mine jelousy so nobody cuts them.

That said, last year, someone helped herself with 6 of my 'Goblemaster' that I intentionnally left uncut. :-(

Thanks for the education and the suggestions.

Sorry about your "Globemaster." :(

I planted a globe flowering onion many, many years ago on a bank which never became part of the garden and was abandoned to whatever would grow. What grew was onions - there are now maybe thirty or forty of them that come up every year and flower even though over-run with briars, goldenrod, etc. Each spring I promise myself to dig some up and move them to the garden - and then summer comes and I'm buried in things to do and the onions go and do their thing all by themselves.

My Globemaster Alliums are about to burst into bloom, but the foliage looks terrible. The tips of the leaves are turning yellow and look like they've been burned. Any ideas?

RickStacy - did you sprinkle Preen anywhere near them? They HATE Preen.
Does anyone know the correct time to divide? Mine are multiplying and I want to divide them this year.