I've had a hell of a time getting my asparagus patch going. Everyone says it is so easy, but that has not been my experience.
It just does not thrive where I have it for some reason. This is in a sort of raised bed (behind a short retaining wall). About 30cm of new blended topsoil brought in and put on top of site soil. Had the soil tested the first year before planting (result attached). Put on some pelleted lime the first year and planted good looking crowns from Nourse about 20cm deep in trenches, gradually backfilled as the plants grew. Plants did grow but not that well, and almost none came back for year two. So I broadforked to loosen the soil and we tried planting seeds. Most came up, but again did not take off in growth. A couple crowns from the first year put out sizeable ferns, which seemed to get some heavy beetle infestation in late fall. We get decent rain during the growing season here, but I watered sometimes if rain was too infrequent.
End of year 1 and 2 I layered on about 2cm of bought compost, and the wood ashes from my barbecue, some azomite scattered around. This spring some thready spears are just now coming up, but plenty of bare spots too. So I guess I'll try some more lime (should test the soil again), more compost, and some new crowns to fill in.
In the same bed, but on the other side of the walkway, strawberries planted the same year are doing great with roughly the same treatment with the exception of putting on pelleted sulfur instead of lime. They both get pretty good, if not full, sun.
I'll probably keep trying for maybe two more years, then I might have to give up and plant something else that likes growing there.