I have asparagus growing in my polytunnel in two short rows (it's a but windy outside for it here) on the downhill side I have a row of strawberries. These are constrained by a board bed edge and don't seem to send out runners. Both are doing fine, last year was the first I have harvested much asparagus. The asparagus took a few years to get established, and since we are generally pretty mild never seems to die back properly in winter. I
mulch around the asparagus with plant material from the tunnel and cut it back in early spring, other than that I
water around both with dilute PISS during the growing season.