Mark from Hermon, Me writes
The Bonide Citrus, Fruit and Nut Orchard spray contains sulfur, so you could not apply it with the Bonide All Seasons Horticultural Spray Oil. Mixing products like oils with products containing sulfur can lead to major damage and burn to the plant. If you need to apply both of these products to the tree, you would need to wait at least a full week between treatments to avoid any unnecessary burn or injury.
Answer last updated on: 03/29/2021