Wilting Pepper Leaves
 

Wilting Cubanelle Pepper
Grown from seed (11-3-2020), healthy until a few days ago, under LED grow lights, Cubanelle was doing fine, strong stem and vibrant leaves have turned limp. Dark green leaves and I believe proper watering. Leaves are now LIMP and lifeless. What happened and what can I do to revive the plant?

If draught, excessive heat or mechanical injury to the stem were ruled out that leaves fungal infection Unfortunately.
Is there evidence of rot at the base of the stem?
Was it planted in a sterile medium?
KarenO

Hi Karen
No evidence of rot on stem, have not pulled plant and inspected roots. Soil was sterile when planted. Never had a pepper this far along go wimpy on me, may just up pot and see what happens. No other options.

Maybe mist with fish emulsion?

It's not looking good for that plant. I would remove the old medium completely, wash it off, plant in new one. Hard to say what happened really. I had something similar a few years ago, still no explanation, except something in the medium. These mixes are mixed with fertilizer, caco3, etc, who knows if something ended up more than usual in that specific part of the mix.

I agree with Zipcode. Pull out the plant, clean and shorten the roots and plant the plant in a new substrate.
Vladimír
PS.: Maybe even reduce leaf area otrháním oldest leaves.

Imhho (in my honest humble opinion) there's a problem with the root system. Check it. Lots of possible causes including fungus, rot or even pests. But the plant is beyond the point of no return. Sorry for being so "cynical".

Milan HP

honestly the leaves look like 2-4d exposure (and since we can't see them closely it could just be the appearance in the photo)... could be in the media mix if you have compost in there of any kind.

When my plants start looking like that with normal watering, I'll dissolve a little epsom salt in the next watering and it perks them up nicely for whatever reason.