Per the Monterey Liqui-Cop RTS label, when treating cherries you should apply as a full coverage spray at the popcorn stage (when the unopened flower buds have matured and the petal color is discernable, so they resemble partially popped corn kernals), and again at full bloom stage.
Monterey Liqui-Cop RTS is only labeled for use on fruit and nut trees.
Monterey Liqui-Cop RTS is not labeled to be used on cannabis.
Monterey Liqui-Cop RTS should be safe to be used on a one year old apple tree.