Deer are a real problem on many plants. Lists of deer resistant plants exist but I must warn you...if they are really hungry they'll open your front door, walk across the room, jump over you stretched out in the recliner watching TV, open the refrigerator and grab the lettuce in the crisper drawer! In other words, hunger expands their palate and increases their bravery.
Sprays of egg solids, hot pepper oil and other such ingredients are available and may help some, especially when the deer "pressure" is not too high. Human hair (from the local barber shop) in bags made of hosery and perfumed soaps have worked for me when they had other options to feed upon. Finally, here are some sites that may help you find those plants they prefer to avoid. Keep in mind that plants recommended for another part of the country may not do well in your area:
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