Liriope, often known as monkey grass or lilyturf, is a popular, low-maintenance groundcover. Its resilience and ability to thrive in varied light and soil conditions make it a favorite among gardeners. As deer populations grow and encroach on suburban areas, managing their feeding habits is a major concern for anyone planting this perennial. Gardeners frequently encounter conflicting information about whether this plant is safe from browsing.
Liriope’s Status as a Deer-Resistant Plant
Liriope is classified as deer-resistant, meaning that deer tend to avoid it when other, more palatable food sources are available. Major agricultural extension services often list the plant as “seldom severely damaged,” suggesting low risk under normal conditions. This natural resistance is due to a combination of physical and chemical deterrents within the plant.
The leaves of mature Liriope plants have a tough, fibrous, and leathery texture that is mechanically unappealing to a deer’s palate. Deer are ruminants that prefer soft, succulent foliage that is easy to digest. Beyond its texture, the plant contains compounds that render it unpalatable or even mildly toxic to grazing animals. The bitter taste and unappealing internal structure serve as a strong disincentive for deer browsing.
Environmental Conditions That Encourage Deer Feeding
Despite the plant’s inherent defenses, “deer-resistant” is not the same as “deer-proof,” and specific conditions can override a deer’s natural aversion. The primary factor is extreme hunger, which occurs most often during late winter or periods of severe drought. When preferred natural forage is scarce, even tough, bitter plants like Liriope can become a necessary food source.
High deer population density in a localized area also increases the pressure on available plant life, forcing the animals to consume plants they would normally ignore. Young plants are particularly vulnerable, as the tender, new spring growth is less fibrous and thus more appealing than the tough, established leaves of a mature clump. Juvenile deer often browse indiscriminately, as they have not yet learned which specific plants to avoid.
Practical Methods for Deterring Deer
For gardeners whose Liriope is being targeted, there are several actionable methods to discourage deer feeding. Repellents work by targeting the deer’s sensitive sense of smell and taste. Homemade sprays utilizing ingredients like rotten eggs, garlic, or chili powder create an offensive odor that signals danger to the deer.
Commercial repellents, which often use similar active ingredients like putrefied egg solids or capsaicin, are also highly effective. Topical repellents must be reapplied frequently, especially after heavy rain, as their effectiveness is temporary. Landscaping adjustments can also provide a passive defense, such as interplanting Liriope with highly fragrant, deer-unattractive herbs like lavender, rosemary, or mint. These strong-scented companion plants can help mask the Liriope’s scent, making the entire area less appealing to a browsing deer.