Larkspur (Delphinium spp.) is a cherished garden plant, known for its striking, tall flower spikes and vibrant hues. Gardeners often wonder if deer will browse these elegant blooms. This article explores larkspur’s deer resistance and offers protection strategies.
Larkspur’s Deer Resistance
Larkspur is generally considered deer-resistant. This resistance primarily stems from the plant’s chemical composition. Larkspur contains various diterpenoid alkaloids, naturally occurring toxic compounds. If ingested in sufficient quantities, these alkaloids can cause digestive upset and severe neurological symptoms in deer and other grazing animals.
These toxic substances make larkspur unpalatable to deer, prompting them to seek alternative food sources. While no plant is entirely deer-proof, larkspur’s inherent toxicity acts as a significant deterrent.
Factors Influencing Deer Browsing
While larkspur possesses natural defenses, no plant is entirely deer-proof. Browsing behavior can vary based on environmental conditions and deer population dynamics, leading them to sample even typically avoided species. Deer are opportunistic feeders, and their dietary choices can shift when preferred food sources become scarce.
Periods of drought, harsh winters, or overpopulation can lead to extreme food scarcity, compelling deer to browse plants they would normally ignore. Young or newly planted larkspur may be more susceptible to browsing than mature, established plants, as new growth can sometimes be softer and more appealing. Curious young deer, or those in areas with limited foraging options, might also be more inclined to test less palatable plants.
Protecting Larkspur from Deer
Gardeners can implement several strategies to safeguard larkspur from deer, especially in areas with high deer activity or during times of food scarcity. Physical barriers offer one of the most reliable forms of protection.
Fencing, such as a tall, woven wire fence (at least eight feet) or temporary netting around individual plants, creates an effective deterrent. For smaller areas or new plantings, temporary cages made from hardware cloth can also provide protection.
Deer repellents can be applied directly to plants or around the garden perimeter. These products work by emitting scents or tastes deer find unpleasant. Common ingredients include rotten eggs, garlic, or spicy components, deterring deer without harming them.
Repellents require reapplication after rain or every few weeks, and rotating types can prevent deer from becoming accustomed to one. Companion planting involves strategically placing strongly scented plants that deer dislike near larkspur.
Herbs like lavender, rosemary, mint, oregano, and sage have pungent aromas that can mask the scent of more attractive plants, making the area less appealing to deer. Strategic garden placement, such as positioning larkspur closer to the home or within a fenced area, can reduce exposure to deer browsing. Combining multiple deterrent methods often yields the most successful results in protecting your garden.