I just bought three tomato plants (different varieties) and planted them in large pots with organic potting soil and two days later they have all developed these spots to varying degrees. Is this some kind of blight? Or trauma from transfer? They aren't overly wet or dry. The leaves aren't wilted. The plants actually look like they have grown a smidge since being transferred. Help!
Tomato Plant Has Brown Spots
Certified GKH Gardening Expert
There can be a few simple reasons for the spotting on the leaves from leaf injury to water spots from water hitting the leaves.
It can be more serious diseases or fungus problems. You can look at the pattern of how it may be effecting the plant.
The links below have more information.
Start by ruling out the issues, since the list of issues can be overwhelming!