I noticed the other day that several of the underleaves of my Elan strawberry plant had died, and that of the two plants in the pot, one of them is severely wilted. I do not see any pests, and the other plant in the same container seems to be doing okay with good production. Some of the leaves are turning dark at the tips. Any idea what's going on? Possibly overwatering or something more serious?
The first picture shows the dark tips on some of the leaves, the second shows the wilted plant.