Answer: Actually, growing the plants in containers could contribute to smaller sized fruit if there is any stress related to watering or soil nutrients or soil temperature or simply room for the roots. Robust plants will naturally produce the best fruit. However, it does sound like you take very good care of them, so the next step would be to look into what variety you are growing. You may find that a different variety of bell pepper would produce larger peppers under the growing conditions you have. Also, make sure you are using compost and fertilizers rich in micronutrients, either a formulation "with minors" or possibly a sea-weed based product. Good luck with your peppers!
Q&A Library Searching Tips