that's it! This was potted up in some skanky old raising mix I had in the shed. I was too cheap to buy a new bag for a couple of seedlings. I guess I'll just rough it out until its time to move outside (only a few weeks away). Then they will have a new home in some quality soil.I had all my plants look like this. Turned out to be a combo of really cheap nasty potting mix and overwatering in my case..
Quarantined! Poor little Douglah.it could be something as simple as intense light causing the plant to create a purple color to help protect itself...anthocyanins?...I think that's what it's called...
or it could be the starting of Bacterial Spot as was said....
quarantine the plant or plants that have this affliction in case it is spot...