Sweet peppers can be grown anywhere as long as you have four months without frost. You can also grow sweet peppers in containers. Sweet peppers need a sensitive to temperature and moisture. Culture: Plant seeds indoors between January and March, or 5 to 7 weeks before setting outside in garden. Transplant plants to the outdoors when 12″ (30 cm) tall or taller. Only plant peppers outdoors on a cloudy day, just prior to getting rain. Plant when soil is warm at least two weeks after last frost. Water well with a soaker hose during dry and hot spells. Harvest: Harvest sweet peppers when they are fully mature using a garden scissor so you don’t damage the plant. Pick peppers as they mature to encourage new buds to form.