I use DeerOff myself because it can be used on food crops as well as ornamentals. I dump
the entire bottle of DeerOff” 16 oz concentrate into a 1-gal jug (such as a milk
jug) then add water until about 1/3 full, screw the lid on tight, and shake it vigorously. I
finish filling the jug with water until full and shake again. Using a funnel, I pour the mix
into the sprayer, filtering the mix with through a piece of open weave fabric (cheese cloth
or burlap), to prevent the sprayer from clogging. I spray plants susceptible to deer damage
weekly during their rapid growth stage when new leaves are coming on. Once full size
leaves are treated, deer usually won't bother the plants for several months.
Its very important to spray deer repellents before deer have a chance to get started, and
repeat until full size leaves are formed. I've found that plants such as Oak Leaf Hydrangea
are susceptible to deer damage during the first 3-4 years after planting, but after the plants
mature, deer don't seem to bother them. Make sure to clean your sprayer after each use
because DeerOff can clog your nozzle if left in the sprayer. Just pour your unused
DeerOff mix back into your 1-gallon jug for storage and flush our your sprayer with
water. Pump clean water through the wand and nozzle. It only takes a few minutes to
clean, and your sprayer will be ready to use the next time you need it.