Has somebody been spraying Roundup nearby? Sprays can drift for quite some distanceâ¦.

I haven't been watering them because we have been getting a lot of rain lately. I have black-eyed peas in the same bed and they are not very green either. When first planted this raised bed I added lime into clay soil, then mixed in mushroom compost, a little bit of regular compost, Premium topsoil (from Home depot, a little too woody) and Garden-Tone. I think I will try the epsom salt and see if that helps.

How many leaves? It it's not unusual to lose a few from the bottom --usually the oldest leaves.

Which leaves are turning yellow, the young leaves or the older leaves? How long ago were the plants transplanted? The leaves that are yellow, is the yellowing between the veins or in the veins and not in between or all over? Since you did not add fertilizer to the second plot (symptomatic plot) then you probably have a N deficiency, just fertilize and you should be fine. I would also get some gympsum or calcitic lime and add that as well. The gypsum is very soluble in water and can supply Ca to the plant fast whereas the calcitic lime is relatively insoluble and will be slowly available to the plant but will offset any of the acidity that the compost has added. If you do a pH test on your own you are only going to get half of the story, so be weary of the results. The pH of the soil is affected by many things, the plant, the soil type and the organic matter. The plant and the organic matter can be measured the simple way but the soil part you need to do something different (namely an exchange) in order to get the value. The soil clay acts in the same way as your water softener, in that it has the capacity to hold a variety of positively charged ions (Ca, Mg, K, H, Na, NH4)and will exchange those with the soil solution thus making them available to the plant. themedicinalpepper.com Here is a link that might be useful: The Medicinal Pepper