Rust spots then leafs died pics

can anyone tell me what I'm doing wrong it seems that I have this problem with all my plants this year as soon as they are transplanted. I'm using promix and cannot figure it out

not one person knows? Im new

Its probably a soil ph issue just flush the pot with a gal of water and when the soil drys out carry on as usual

Do you have a soil ph tester?
the top pic leaf looks like possible signs of root rot
how heavy is the pot it should be real light has it ben getting over watered?

Yes it was heavy after I watered during the transplanting.. I think over watering is possible from the transplanting they are in very large pots and I did flush the soil because I saw the spots develop the very next morning after
also they got rained on for an hour or so I put them in the greenhouse because it got stormy.. its been too hot as well and the greenhouse gets way too hot so they sit it out on my deck, the weather is so nice out.

K just try to get them to dry out fans pointed at the rootballs the greenhouse might help with a little bit of heat but idk how hot it is you might be better off just to transplant them into dryer soil

Looks like a calcium deficiency to me. Soil pH too low or humidity too high. Calcium is taken up during transpiration. If too humid or too cool they don't take up enough water, which is how calcium gets into the plant.