Hello everyone,

First time poster and a perplexing issue has brought me here. I've done SFG method for three years and usually everything has just worked. But this time I've got a weird issue.

I have a tomato (Black Beauty), a plant of Mexican Oregano, and a tomatillo plant all displaying signs of iron deficiency: new growth that is yellow closer to the stems. Each are in a different bed.

What I don't get is that plants next to them aren't displaying any of these symptoms. I have a tomatillo plant right next to the one that is yellowing/bleaching on new growth, and it's fine. The tomatillo plant in question is also otherwise looking good and growing well.

The Mexican Oregano also looks good. The tomato plant has cupped leaves and is looking droopy, and isn't growing as fast as the one two spaces next to it (the spaces in between are vacant), but none of the peppers nearby are exhibiting symptoms.

Any ideas? I added some fresh peat this year and vermiculite, as well as compost. On one bed I used happy frog soil conditioner and some cow manure; in the other beds I used some random composts including cow manure and mushroom compost. But since it's not affecting whole beds, it seems kind of weird. Thought I would ask here but perhaps the soil forum would be a place too if we're all as confused as I am. thanks!