The Sweet Pepper Banana Supreme, 'Capsicum annuum Hybrid', is an improved sweet banana type pepper with up to 37% greater yields. The Sweet Banana Supreme is an early producer of sweet banana peppers that measure up to 8 inches by 2 inches. The peppers are sweet with a smooth skin. It slowly matures to red but remains sweet. Note: To get a jump on the season transplant outside, use a walls-of-water or some black plastic to maintain and increase temperatures. Peppers use quite a bit of water but prefer to be watered deeply and not too often.