Give them time. You planted late, the crowns may have needed more time to recover. But they're tough and resiliant.

Much more time. Newly planted crowns can take 8-10 weeks to show any above ground growth as the focus is on the roots. And planting this late will likely delay it longer. Keep them well watered.

Dave

Asparagus needs to have good draining soil to perform well. Your enriched soil and compost would have been well served to have had some sand with it. Were the asparagus placed over hard pan non-draining soil there may be a problem with standing water...but at any rate, have patience, I remember it took almost 2 months before my ass-per-grass came thru...