We are putting in 10 Conovers Colossus asparagus crowns. Undergardener repurposed the old fence to make me some super raised beds, and you can see some lovely organic FYM - beside, but not on top of the asparagus. Have mixed a fair bit of grit in with the soil, as we have a clayey soil, and the asparagus like it sandy. As the asparagus tips appear, we'll fill in more and more of the bed.
I guess we will have to wait till next year - at the earliest - to sample these. However, the suppliers sent twice the number of crowns we asked for, so we have planted the remainder in pots and will sample a few of these- don't mind if they don't bulk up.