That's right John, I'm sure I've planted alliums later than this. Maybe not ideal, who knows - who cares as long as it works. If a bulb hasn't shrivelled up or gone mouldy it will be OK. But if it's not the right time getting hold of them might be a problem. Have you got some Olive?
When we moved to this house there was a bowl of really shrivelled up somethings in one of the rooms. I planted thm out and they're a large patch of ? Ice Follies now. Never give up on a bulb.