Also, we are growing "Purple Marconi" peppers for the first time. They are green, then turn a deep purple, then turn to red. We have a few turning purple, so I am looking forward to this whole process.
You can also amend soil with Bone meal, which I buy at the end of the season when the stores are trying to get rid of the surplus amendments. Also, gypsum is another common amendment that provides calcium, without changing pH, whereas Limestone will change the pH. Egg shells are easy, of...
You need to provide your location and climate type info. Wet, hot, dry, cold, etc?
Blossom development can be impeded by lack of calcium. Add crushed oyster shell or egg shell into soil around the plants. Otherwise, others may have input.