White bell peppers are warm-season crops and grow best at temperatures between 65–86°F. They can be grown in many soil types although sandy soils warm faster in Spring and are good for early planting. The soil should have a pH between 6 and 7. Peppers will not tolerate water saturated soil and should be planted in a well draining soil or raised bed. Peppers should be planted in an area that receives full sun for most of the day.
Sowing seeds
In most cases, pepper seeds should be started indoors 8–10 weeks before the last Spring frost. Pepper should only be direct seeded in areas with a long, warm growing season, otherwise seeds should be sown indoors in flats or cell trays using a sterile seedling mix. Plant seeds to a depth of 1/4 in and water lightly. Seeds should not be allowed to dry out as there will be a negative impact on germination should be positioned in a warm, bright, South facing window or under fluorescent lighting. The optimum soil temperature for germination is 70–85°F. A heat mat can be used to warm the flats if required. Seedlings will emerge within 8–25 days and after the seedlings has developed two sets of true leaves then they can be moved to a larger 3-4 in pot. Seedlings should be provided with ample light and adequate fertilizer.