How do I know if my artichokes are ready for harvest?

Question

I planted artichokes this year. I don't know the type but the leaves are grey/blue and similar to a thistle. It's September in Toronto and I see no flowers or buds. Should I be worried? Suggestions? Thanks.

Answer 1

You can tell if the are ripe by trying to pluck a leave. if it comes off easy they are ready.

Answer 2

http://search.yahoo.com/search?p=articho...

The part you eat is the bud...inedible if it's gone to flower.

http://images.search.yahoo.com/search/im... (Third and fourth image are ready for picking.)