Light
Light is always a factor. Place your plants near brightly lit windows that receive many hours of sunlight. Little sunlight results in narrow stems.
Feeding
Feeding your chili pepper plants can help, especially when growing them indoors. Miracle Gro or a similiar plant food or fertilizer is recommended for feeding the plants. To break it down, these fertilizers contain three important elements that feed the plants - Nitrogen, Phosphorous, and Pottassium, or N-P-K. Use as recommended on the package. Usually you only need to fertilize every 2 weeks. Lastly, keep an eye on your chili pepper plants. Some produce more quickly than others, but many take a while. Learn more about growing chili peppers here - A Guide to Growing Chili Peppers.
Growing Chili Peppers from Seed Growing Chili Peppers in the Ground Growing Chili Peppers Indoors Growing Chili Pepper Plants in Pots Harvesting Your Chili Peppers Winter Gardening for Chili Peppers and more
