WL 558HQ.RR is a winter-active, non-dormant FD=8 alfalfa. Highly resistant to resistant for all major aphids and nematodes. WL 558HQ.RR has excellent tolerance to leaf diseases, promotes improved leaf retention, higher protein levels, and greater forage quality. Also highly resistant to phytophtora root rot, and resistant to fusarium wilt and anthracnose.