I stuck my finger down the hole and still a little mushy
In my area zone 6 they start popping mid/late April and are still coming up 5 weeks later. You can almost time them with Daffodils.
What I have noticed is the pups/offshoots come up first and then followed by the main stem but that is not always the case.
When I took this series of photos last year some of the plants were at 5 feet yet others were like photo shown....go figure.
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spring growth by
Hostafarian, on Flickr