• Yarrow is unpalatable to deer.James And James/Brand X Pictures/Getty Images
  
  Deer can wreak irreparable damage to the landscape because they enjoy eating the plants and flowers. However, there are some plants from which they seem to steer clear. For southeast Pennsylvania, look for deer-resistant plants that have a United States Department of Agriculture Plant Hardiness Zone rating of 6a or 6b. Keep in mind that no plant is 100 percent deer-resistant, but many elicit less interest from the local deer population.
  
  

Japanese Plum Yew

• Japanese plum yew (Cephalotaxus harringtonia) is a deer-resistant evergreen shrub that features a spreading, rounded form. It grows up to 10 feet tall and 14 feet wide and is typically wider than it is tall. It bears non-showy, male flowers that are followed by the olive-like, female fruit. The spirally arranged and sharply tapered foliage on Japanese plum yew grows 1 to 2 inches long and holds its color well into winter. Hardy, it is drought- and heat-tolerant and tolerates a wide range of soil including dry, sandy or clay soil. Japanese plum yew grows best in part to full shade and well-drained, moist soil. Grow Japanese plum yew in USDA zones 6 to 9.
  
  

Yarrow

• Yarrow (Achillea millefolium) is a perennial flower with a fast growth pace and spreading growth habit. It reaches up to 3 feet tall and wide and features small clusters of flat-topped, summer-blooming flowers or corymbs that attract butterflies to the garden. Yarrow flowers range in color from salmon and peach to yellow and orange and are complemented by the finely textured silvery green foliage. Yarrow grows best in full fun and well-drained soil. Hardy, it is both deer- and drought-tolerant, once established. Grow yarrow in USDA zones 4 to 9.
  
  

Hellebore

• Hellebore (Helleborus odorus) is a perennial flower that emerges in mid-winter to last into spring. It has a moderate growth pace and grows 1 to 3 feet tall and wide. Hellebore bears double flowers that are white or pink. Versatile, it is both frost- and deer-tolerant, and can withstand heat and humidity. As an evergreen, the foliage on hellebore remains with color during winter to add much-needed vibrancy to an oftentimes dreary season. Hellebore grows best in full to part shade and well-drained, neutral to alkaline soil. Grow hellebore in USDA zones 4 to 9.