Advanced Nutrients - Bud Factor X" Advanced Nutrients Bud Factor X Bud Factor X uses immune system stimulators to trigger a fight or flight style response in plants without having to induce actual harm. One of the major effects of this fight or flight response is a greatly increased level of essential oil production, which in turn delivers much bigger harvests. How Bud Factor X Works: Bud Factor X works on your plants immune systems, triggering their off their natural defences. It