Garden CRISIS | My Garden Is Dying 

I have never had good luck with the Roma type tomatoes so I just gave up on them. I do oxhearts now instead. I don’t have the issue with the end rot and they are meaty enough for sauces. Amish Paste, Wes, and Kosovo varieties work well in my garden. Good luck on the rest of your season. This has been a challenging one here with all the rain we have had.

I had a late start this year and had similar issues. I can see powdery mildew on some plant leaves, like squash. I had that issue and I carefully z(trying to not let spores become airborne) removed all leaves with powdery mildew leaves from the plants and I had end rot also from inconsistent watering and I simply removed those, I did not know it before but squash flowers may have to be pollinated twice to prevent end rot and since both good and bad microbes live in the soil it is best if you don’t have hardly any leaves touching soil by thinning those leaves from the bottom and using sticks and by tying plants or using the Florida plant tying where you crisscross between the sticks around your plants early in the season. I live in Ohio and I use a greenhouse so my problems may not be exactly the same as yours but seems like you are doing better than I have so far with learning so stay proud and diligent and next year will be better.

my opinion on the cucumbers is that it could be soil density. cucumber roots are thin and light weight. they don't do well in digging deep.