Spots on tomato plant leaves
Help! I've been growing tomato and pepper plants from seed indoors (with the help of grow lamps), from seeds that I simply collected from vegetables I used in the kitchen. They have grown well, but they are still in an early-is stage having not yet flowered. Some of the tomato plants have developed increasing numbers of small brownish, shiny spots on their leaves, starting on older, lower leaves (pics below). Other than the spots there are no other signs of something being wrong. I have watered the plants every couple of days or so, and occasionally have added some Tomato Feed. The spots don't seem to quite match descriptions of common problems I have found online, so I'm not sure what to do to address it! Does anyone know what this is?