Homeowners and landscape designers often question whether ornamental grasses share the feeding grounds with browsing wildlife. The short answer is yes, deer will consume ornamental grasses, but the interaction is more nuanced than a simple yes or no. Understanding which grasses are preferred, the conditions that increase grazing pressure, and how to protect your planting investments is essential for creating a resilient and beautiful landscape.
Do Deer Actually Prefer Ornamental Grasses?
Deer are instinctive survivors, and their diet shifts dramatically based on seasonal availability and nutritional needs. While they generally view tall, fibrous ornamental grasses as a food of last resort, they will graze on these plants when preferred options are scarce, such as in early spring before other plants leaf out or during periods of drought that reduce browse quality. The primary attraction is not the taste but the sheer abundance and physical structure of the grasses, which can provide easy-to-access nutrition when other browse is limited.
Grasses That Are More Likely to Be Targeted
Not all ornamental grasses are equal in the eyes of a hungry deer. Some species with softer foliage, higher nitrogen content, or a history of being grown as salad greens are significantly more vulnerable. Here is a breakdown of grasses that present a higher risk of being eaten.
High-Risk Grasses
Japanese Blood Grass (Imperata cylindrica 'Rubra'): The striking red-tipped blades are unfortunately a favorite snack for deer, particularly in the spring.
Lemon Grass (Cymbopogon citratus): This tender, clumping grass is not only deer-resistant in name only but is also a common herb, making it an easy target.
Fountain Grass (Pennisetum alopecuroides): The soft, flowing plumes are often browsed by deer, especially in nutrient-poor soils where the plant is already stressed.
Bunch Grasses: Smaller, clumping varieties lack the protective mass of larger species and are more likely to be completely consumed.
Lower-Risk Grasses
Switchgrass (Panicum virgatum): Its tough, upright stems and waxy coating make it less palatable.
Blue Fescue (Festuca glauca): The sharp, silvery-blue blades are generally avoided due to their texture.
Maiden Grass (Miscanthus sinensis): While not completely ignored, the dense clumps and height often deter deer.
Sedge Grasses (Carex spp.): These low-growing, grass-like plants are typically left alone by deer.
Environmental Factors That Increase Risk
The likelihood of deer eating your ornamental grasses is heavily influenced by external pressures. A healthy deer population with few natural predators will steadily increase grazing pressure on all available vegetation. Similarly, habitat fragmentation forces deer to travel further for food, leading them to explore suburban landscapes they would typically avoid. Extreme weather events, such as severe droughts or harsh winters, eliminate natural forage and drive deer to consume plants they would normally ignore out of desperation.
Strategies for Protecting Your Landscape
Preventing damage requires a multi-layered approach that addresses the deer's motivation and ability to access your plants. The most effective strategy combines physical barriers with strategic planting design to create a landscape that is less inviting.
Physical Barriers
The most reliable method of protection is a robust fence. An 8-foot-tall woven wire fence is the standard recommendation, as deer are excellent jumpers and can clear lower obstacles. For individual high-value plants, discreet 36-inch chicken wire cages can be placed around the base, protecting the new growth without compromising the aesthetic of the surrounding garden.
