I’m not sure that I understand the setup—are there several pepper plants in one container, one plant being far more advanced than the others? Or, are they all now planted out in a garden? As the above article suggests, two seedlings grown together seems to work well, but otherwise it is best to space plants 18 to 24 inches apart; you might want to thin them out a little, by snipping at the base (don’t pull plants up, to avoid disturbing roots of plants you’d like to keep). Fertilize when transplanting, and then after first fruit set. Be careful not to give too much nitrogen, which encourages leaf growth over flowering, until the peppers are developing. If you have lots of flowers but no fruit, you might try hand pollinating to help things along,
I’m not sure that I understand the setup—are there several pepper plants in one container, one plant being far more advanced than the others? Or, are they all now planted out in a garden? As the above article suggests, two seedlings grown together seems to work well, but otherwise it is best to space plants 18 to 24 inches apart; you might want to thin them out a little, by snipping at the base (don’t pull plants up, to avoid disturbing roots of plants you’d like to keep). Fertilize when transplanting, and then after first fruit set. Be careful not to give too much nitrogen, which encourages leaf growth over flowering, until the peppers are developing. If you have lots of flowers but no fruit, you might try hand pollinating to help things along,