Comment by foobarian
Thanks for these insights!
I did get seedlings this season, and even planted them mid May. I thought I did pretty well not being late this year.
The only thing I can think of is not enough water; I had a thick layer (1-2 inch) of straw for mulch, and figured that would let me water less frequently. (Though I did do a finger check every few days).
Interesting you mention the cherries; it's the only plant with fruit even this late in the season. The others are assorted regular size varieties like Cherokee or other heirloomy types.
(edit: correction: it was mythrwy in the sibling comment that mentioned the cherry tomatoes! Thank you as well.)
Agreeing with you and mythrwy: in Pittsburgh, our cherry tomatoes have been gonzo the last few years and our heirlooms have been only middling productive.
Which is annoying because they're so much more work to cook with. :)