Green Goblin wrote:
Hi,
My allium bulbs, which I planted last autumn, have produced a fine
display this spring and have now finished flowering. The question now
is what's the best way of keeping the bulbs for next year?" Do I
remove all the seedheads to promote bulb growth and should the bulbs
be lifted and stored dry until the autumn?
Any thoughts gratefully received!

Leave em be! they will be very happy and return with new freinds next year!

pk