Purple Blotches On Leaves

[orangehero]

Hello,

Could someone please help my diagnose my problem.

Tomatoes are yielding well, though they are fairly stunted. Most of the tomatoes are suffering the same foliage symptoms. Purple blotches are most on older growth at the bottom of the plant. At some point a lot of the new flowers dried up. Also had a bit of a drought this summer.

I suspect it is phosphorus deficiency, but it doesn't seem to exactly match the descriptions or any photos I've seen. I was away for over a month, so perhaps it is simply the late stages. Added some bone meal today, so we'll see what happens...pretty late in the season though.

Thanks in advance and I hope everyone is having a pleasant summer!