Is my dymondia dying?
I have dymondia in a roughly 12' x 12' area with a broken concrete path running through it. It's been there just about a year. After a sunless winter (it's on the north side of the house), it came back very strong in the spring once the sun hit it and became a very full, lush green carpet.
However, in the last two weeks, a couple of the dymondia plants have begun to die. They turn white and whither and then that's it. See attached photo
The temps in So Cal have been in the mid-high 70s with hot sun. The plants get a minute or two of water every morning in these conditions.
1) Not enough water: I don't think so, as the soil remains moist below the surface in the afternoon. I also have tried hand watering the affected areas. Also, dymondia have very long roots, and are very drought tolerant. This is one of the sunnier areas though, so perhaps there is the issue.
2) Too much water: It's literally only a minute or 2 of sprinkler in the morning, so I don't think that's too much
3) Disease: Have not come across anything that matches that description (people in wet areas seem to have problems with mold and fungus, but not me)
4) Cat urine: we have three cats that hang out back there most of the day. They tend not to like to urinate in areas like that, preferring the gravel paths and bark mulch so they can bury their business. I don't think it's likely, but I figured I'd bring it up.
5) Something I'm not thinking of?