- Advanced Nutrients Bud Factor X is a powerful nutrient enhancer that helps to increase flowering and yield in plants grown in soil, coco, coco coir, perlite, or hydroponic. This specially formulated blend of plant growth regulators and amino acids promotes bigger, heavier, and more resinous buds. With its unique blend of ingredients, Bud Factor X is the perfect choice for growers looking to take their plants to the next level.