Transplanting ornamental Alliums

I grow quite a few large Alliums. I have a clump which was about 6 and is now about 16! I meant to split them up after they had finished flowering last season and failed miserably to remember
I walked past them today and they are up about 3 inches. Can I split them up now? or leave them until after they have flowered and no doubt forget again. Wondered if anybody had attempted doing what I would like to do and if so was it viable? I have moved Oriental Lilies when started into growth (you can't always do things when you should because of weather/huge number of jobs with big garden) and with quite a bit of care I managed to move them successfully only snapping off the growing point of 1 bulbs so not too bad.

 

I’m not an allium expert but I wouldn’t risk it. You may end up with no flowers. I would wait until after flowering.

 

Yes I agree with Redwing.....divide them after flowering. The safest way!!
However, I must confess to moving bulbs even in flower and, usually, get away with it. The secret is to try and get a big enough lump of soil keeping the rooball intact. At 3" it isnt too tall.
If you err on the side of discretion then make a note somewhere, perhaps on the calendar, to move them after flowering

 

never have moved them. but have only a few. can get more as we took down a few trees