Think of it like a tomato. The longer a tomato stays on the vine, the riper it gets and the redder it becomes. [4] X Research source
The bell peppers you buy in the store are bred to ripen at their wanted color, giving them that perfect taste. [8] X Research source Purple bell varieties won’t go through the same ripening color changes as a yellow or red pepper. They will start off as green and keep turning a darker and darker purple, with their ripest color being a purplish black.
Shiny and wrinkle-free skin is a visual sign that the pepper is firm.
A pepper’s flavor changes with the color, so don’t hesitate to pick it once it turns purple. You should try to plant bell peppers in the warm season. By doing this, you can provide them with the right temperature and enough sunlight. Remember to use mulch to help absorb sunlight and keep the soil warmer for a more extended period that will go through a thriving period, which will encourage the bell peppers’ growth.