They'll be in the shops here in the next week or so and ready for planting straight away so I wouldn't worry.
What kind are yours and have you planted them deeply enough to be safe from any frosts this winter?
I have Christophii and Purple Sensation and Sphaerocephallum nectarospordum and a white globe form that all spend their lives in the borders from one year to the next and come up and do their thing with no probs.
I think they'll be fine planted now. I reckon the "plant in october" advice is a "not later than" so the bulbs don't start to dehydrate and weaken.
Agree with obelixx, planting as soon as you get them is best. Apart from a few fussy bulbs (esp. those which won't survive our wet winters as they are native to different climates), bulbs only deteriorate when left dry and unplanted.
Hi aym. I have just planted my 4 Allium giganteum into 25cm pots - one per pot - as I am intending completely revamping my front garden next year and all my precious plants are being saved in pots until then. I have also planted Allium schubertii in pots (3 per pot) and am awaiting more through the post. Think I've gone a bit onion potty this year but having seen them all at Tatton earlier and how swamped in bees they were I just had to have them.