Answer: If the pepper that's limp has been that way for a week or more, it sounds like it's suffered some type of root problem--it could be disease or water stress from either too much or too little water. The plants should be growing well now that the weather has warmed up--it sounds like only one of yours is thriving. I'm afraid that the other two might not perk up in time to produce a good sized crop this season. You might want to purchase a few transplants to fill in those spots, if you have your heart set on lots of peppers.
The healthy pepper probably doesn't have more leaves than it needs. That said, it should start flowering and fruiting soon, if it isn't already. Over-fertilization, especially with a high nitrogen fertilizer, can cause foliage growth at the expense of flowers and peppers.
You may want to get a soil test done, if not for this season, for next. Clay soil and peat moss can both be acidic--and if your pH is off your plants will struggle. If the soil tests acidic, follow the results' recommendations on
adding lime--preferably this fall so it has time to work.
Q&A Library Searching Tips