House & Garden Bud-XL uses enzymes’ processes to extract sugars from the large bracts for storage in the fruits or flowers of the plant. This leads to bigger, sweeter and more robust fruits. The flowers will become larger and improve in colour and quality. Some users may see a natural fading, purpling or yellowing of the leaves and stems of their plants, as sugars are drawn away from the stems and leaves and directed to the flowers. This is referred to as “Autumn Colours”.