Gardening in areas with a deer population often presents a challenge when selecting ornamental plants that will not become a quick meal. Many gardeners find themselves asking whether their vibrant begonias are safe from browsing deer, a common native herbivore with a broad and opportunistic diet. While deer are known to sample a wide array of flowers and foliage, their preferences are driven by a complex mix of taste, texture, and immediate availability. Understanding the relationship between these popular annuals and local wildlife is the first step in protecting your garden displays.
Begonias: A Look at Deer Resistance
Begonias are broadly categorized by gardeners as deer-resistant, meaning they are typically low on a deer’s list of preferred forage items. This classification is not a guarantee that the plants will never be browsed, but it suggests that deer will generally select other available food sources first. Resistance levels can vary among the different types of begonias, which are largely grouped by their root structure.
Fibrous-rooted varieties, commonly known as wax begonias, possess a waxy, thick leaf that is less palatable to deer than tender foliage. Rex begonias, grown primarily for their striking, textured leaves, offer a fuzzy or rough surface that deer find unappealing. Tuberous begonias, known for their large, showy blooms, are also generally avoided.
Factors That Influence Deer Feeding Behavior
The natural resistance of begonias stems from specific characteristics that make the plant undesirable to most deer. One significant deterrent is the presence of oxalic acid within the plant tissues, a chemical compound that imparts a bitter taste to the leaves and stems. This compound contributes to the plant’s low palatability rating.
Deer also rely heavily on their sense of touch and will avoid plants with certain physical textures. The glossy, waxy coating on fibrous begonias or the fuzzy texture of other varieties serves as a physical barrier and taste deterrent. However, no plant is truly deer-proof, and these natural defenses can be overridden by environmental pressure.
When preferred food sources become scarce due to drought, harsh winter conditions, or local overpopulation, deer often become less selective in their foraging. In these situations, even plants with natural chemical or textural deterrents can be browsed out of sheer necessity. Young, newly planted begonias, which are often tender and highly fertilized, are particularly vulnerable to a passing test bite.
Practical Methods for Protecting Begonias
For gardeners experiencing browsing despite the begonia’s general resistance, employing active protection strategies is the next logical step. Taste-based and scent-based commercial repellents are highly effective, as they exploit the deer’s aversion to strong, unpleasant odors or flavors. Repellents containing ingredients like putrescent egg solids or capsaicin must be reapplied regularly, especially after rain or to protect new growth.
Physical barriers offer the most reliable form of protection by preventing access entirely. While an 8-foot-tall fence is the gold standard for full garden exclusion, smaller plantings can be protected with temporary netting or low chicken wire barriers. Growing begonias in elevated hanging baskets or containers on a porch or deck also places the plants out of the typical browsing height of deer.
Companion planting can also be used as a strategic, non-chemical deterrent. Placing begonias near strongly aromatic herbs, such as lavender, rosemary, or sage, can help mask the begonia’s milder scent. These fragrant plants naturally repel deer, creating a protective perimeter that encourages the animals to graze elsewhere.