I see you mentioned all your other plants are doing great but in another thread (https://www.houzz.com/discussions/strawberry-issues-dsvw-vd~5392302) you said your strawberries aren't. Are your other plants which are doing great also peppers?

One of the most common causes of peppers wilting like that is overwatering/soil kept overly wet. Root rot develops.

Dave

Definitely not overwatering all other pepper plants are great none like this. Most of garden is best I have ever had.

"all other pepper plants are great none like this. Most of garden is best I have ever had."

Then why worry about this one? Just pitch it. Plants die for all sorts of reasons and it isn't realistic to expect everything to grow perfectly. Clearly something has damaged the roots but you may never know exactly what did it. Try giving it a good soaking if you are convinced it hasn't been over-watered. If it recovers, fine. If not then you rack it up to a loss. Everybody has them every year. ;-)

Dave

Agreed with Dave. All my 25 peppers are great- except one. One of my black hungarians just is doing blah for whatever reason. It happens sometimes. You might have over/underwatering, a generally weak plant, something going on in the roots.. but if all the rest of your peppers are great, don't sweat the occasional fail plant.

Sometimes the opposite happens, and a pepper I thought I lost comes back- like this year my peach hab got whacked by something that pretty much decapitated it. Now it's grown back and nice and plush.

Feed with diluted solution of 3% Hydrogen Peroxide diluted with equal amount of water making final solution having 1.5 % of Hydrogen Peroxide in the solution. This will help if the plant wilting is due to lack of Oxygen in the roots.

Thanks guys! After thought I have had this happen before - only to container peppers. I used to think it got bumped and "broke" by kids or dog - thus breaking lots of roots. A second one is doing it now.