Input needed on foliar disease

[sarahs]

Hello fellow tomato lovers, I need your advice!

I am new here, as I just discovered this amazing forum a few days ago. I am a relatively new gardener, I grew up with parents who were avid gardeners but have only grown my own in the last couple of years (much to learn!)

I just planted my 10 new tomato transplants into my garden exactly one week ago yesterday. Unfortunately, I am already encountering some type of foliar disease. I drove around 150 miles to pick them from a tiny heirloom nursery in LA where I had special ordered them, and am terrified of the thought of loosing them to whatever this is! I have looked through lots of old threads and stickies on the forum about diseases, as well as the wonderful resources you all have posted. I suspect it may be bacterial spot or possibly Septoria? Possible early blight, but the lesions seem to small judging by the pictures. I would love some input, as well as any treatments you guys can recommend! I was all set to go get some daconil today but then I didn't want to use if something else might work better.

It started a few days after transplant on one plant, as tiny dark black spots with no obvious halos that I could see. The lower branches on that plant began to look pretty bad, I just cut them off today (see first few photos). On some leaves there is a black edging around a good part of the leaf. I can see tiny tiny spots on some of the newer growth of the plant I just trimmed. In the last day or two, I noticed that now two of my other plants have little spots starting (last few pictures).

I did not notice any signs of the disease on any of the plants when I first got them a week ago, but it is possible that I could have missed it if it was very small.
I am growing them in a new part of my garden this year (spent about a week ripping out weedy lawn). I did not notice anything like this last year. The plants are spaced at least three feet apart, I mulched with straw to try to avoid soil backsplash. I have been watering with little circular trenches until I can fix my drip system - although I'm sorry to say I mad the dumb mistake of overhead watering them on the first day. I also sprayed everything with Neem oil about 5 day ago. While I like the idea of staying organic, I am more than willing to use something stronger if it will help my plants.

Thank you very much in advance, sorry it's so wordy!

Sarah