牛奶那个有用过,对我家的芍药又用,网络上的掺水比例: --Mix 60 parts water with 40 parts milk or whey, and spray onto the affected plants bi-weekly. You can even use whole milk without dilution for a strong effect. ---Mix 1 oz. powdered milk to 2 liters of water, and spray onto affected plants bi-weekly.