Pepper (Chilli) Plant Fiery Flames The fruit ripens from green to red, producing chilli peppers that are 3cm long and 1 cm wide. This vegetable plant is compact making it the perfect size to sit happily on any windowsill. Strong upward-facing fruit, your plant will harvest up to 50 spicy chilli peppers rated 100,000 on the Scoville scale making it very hot. The perfect addition to any Mexican recipe, this vegetable plant is satisfying and easy to grow. Height Up To 30cm (12in). Spread Up To 30cm (12in).