Pepper plants keep producing right up until the first frost, and most fruits actually sweeten (or intensify in heat) the longer they're left to ripen from green to their final red, orange, or yellow color.
From mild bell peppers to fiery habaneros, the entire pepper family shares the same basic growing needs, and most home gardeners find peppers among the most productive and reliable warm-season vegetables to grow.
Peppers want full sun, warm soil, and consistent watering, and are best started indoors several weeks before the last frost since they're slow to germinate and need a long warm season to fruit well. Staking taller varieties helps prevent branches from snapping under a heavy fruit load.
A pepper's heat comes primarily from capsaicin concentrated in the white membrane inside, not the seeds themselves — removing that membrane, not just the seeds, is the real key to milder heat.