Yellow spots on leaves of tomato seedlings
Hi, I am a new gardener and I wondered if anyone could advise me on a problem with my tomato seedlings? They are about 4 weeks old and looked really healthy until about a week ago when I noticed pale spots on the first set of true leaves. Some of these leaves have now started to shrivel up and I noticed this morning that the spots have just started to appear on the second set of true leaves as well. I’m posting some photos so you can see what it looks like - thank you!