If you’ve planted cheerful black eyed Susans only to find them nibbled down to stems, you’re likely dealing with deer browsing in your garden. Understanding how attractive these flowers are to deer helps you decide whether to plant them, protect them, or choose alternatives that fit your landscape better.
This guide explains how deer interact with black eyed Susans, what factors influence their feeding habits, and practical ways to enjoy these sunny perennials even in areas with heavy deer pressure.
Do Deer Eat Black Eyed Susans?
Deer typically avoid black eyed Susans because the plants have coarse, hairy foliage and stems that deer find unpalatable. While black eyed Susans are considered deer-resistant, hungry deer may still browse them during food shortages, drought, or winter when preferred plants are unavailable.
Why Black Eyed Susans Are Usually Deer-Resistant
Black eyed Susans (Rudbeckia hirta and related species) have several characteristics that discourage deer browsing. The rough, bristly texture of the leaves and stems makes them less appealing than smoother, tender plants.
The plants also produce compounds that give them a slightly bitter taste. Deer generally prefer sweeter, softer vegetation like hostas, daylilies, and roses when those options are available.
The fuzzy coating on black eyed Susan foliage can irritate deer mouths and digestive systems. This natural defense mechanism evolved to protect the plant from many herbivores, not just deer.
When Deer Will Eat Black Eyed Susans
No plant is truly deer-proof, and black eyed Susans can become targets under certain conditions. Understanding when deer are most likely to browse helps you anticipate and prevent damage.
During Food Scarcity
In late winter or during drought, when preferred food sources are scarce, deer expand their diet to include plants they normally avoid. Black eyed Susans may be browsed during these desperate times, especially the tender new growth in early spring.
High deer populations in suburban and rural areas increase competition for food. When too many deer occupy an area, they eat progressively less palatable plants including those with coarse foliage.
Young Plants and New Growth
Newly planted black eyed Susans have softer, less developed foliage than mature plants. Deer are more likely to sample or damage young transplants before the plants establish their full defensive characteristics.
Fresh spring growth is also more tender and appealing than mature summer foliage. You may notice deer browsing in April and May even if they ignore the same plants in July.
Regional and Local Variations
Deer preferences vary by region based on what plants they’ve learned to eat in their local habitat. In some areas, deer rarely touch black eyed Susans, while in other locations they may browse them regularly despite the hairy texture.
Individual deer also develop different tastes. One neighborhood may have deer that consistently avoid black eyed Susans, while another mile away experiences frequent damage from deer with different feeding habits.
Protecting Black Eyed Susans From Deer
If you live in an area with significant deer pressure, you can take steps to reduce browsing damage. Multiple strategies often work better than relying on a single method.
Physical Barriers
Fencing is the most reliable deer deterrent. A solid fence at least eight feet tall prevents deer from jumping over, though this solution isn’t practical or desirable for every property.
Individual plant cages made from wire mesh or plastic netting protect black eyed Susans until they mature. Remove the cages once plants are well-established and less vulnerable, usually by midsummer of their second year.
Repellents and Deterrents
Commercial deer repellents containing putrescent egg solids, garlic, or hot pepper can make black eyed Susans even less appealing. Reapply these products after rain and every few weeks during the growing season for consistent protection.
Homemade sprays lose effectiveness quickly and may not provide reliable protection. If you choose to make your own deterrent, understand you’ll need to apply it more frequently than commercial formulas.
Motion-activated sprinklers startle deer when they approach your garden. These devices work best when moved periodically so deer don’t learn to avoid or ignore them.
Landscape Design Strategies
Plant black eyed Susans closer to your house where human activity naturally deters deer. Deer typically avoid areas with frequent foot traffic, noise, and domestic animal scents.
Surround black eyed Susans with strongly deer-resistant plants like lavender, Russian sage, ornamental grasses, or catmint. This creates a protective buffer and reduces the likelihood that deer will venture into the planting bed.
Avoid creating sheltered feeding areas by keeping sightlines open and removing dense shrub cover near flowerbeds. Deer feel more vulnerable in exposed areas and are less likely to linger and browse.
Companion Plants That Deter Deer
Mixing black eyed Susans with plants deer actively dislike strengthens your garden’s overall resistance. Choose companions that share similar sun and soil requirements for best results.
These perennials pair well with black eyed Susans and offer strong deer resistance:
- Purple coneflower (Echinacea), though young plants may be browsed
- Salvia and Russian sage for aromatic foliage deer avoid
- Lamb’s ear with fuzzy leaves deer find unpalatable
- Yarrow with finely divided, aromatic foliage
- Coreopsis for similar growing conditions and bloom time
- Ornamental alliums that smell like onions
Avoid planting highly attractive plants like hostas, tulips, or roses near your black eyed Susans. These favorites will draw deer into the area, increasing the chance they’ll sample everything available including less-preferred plants.
Growing Conditions That Support Healthy Black Eyed Susans
Vigorous, healthy plants recover from occasional deer browsing better than stressed specimens. Proper growing conditions help black eyed Susans thrive and maintain their natural defenses.
Sunlight Requirements
Black eyed Susans need full sun, meaning at least six hours of direct sunlight daily. Plants grown in shade become leggy, produce fewer flowers, and may have weaker defenses against browsing.
In very hot climates, afternoon shade can prevent stress without compromising bloom or plant health. Monitor your plants and adjust placement if you notice weak stems or sparse flowering.
Soil and Drainage
These adaptable perennials tolerate a range of soil types but perform best in well-drained soil with average fertility. Overly rich soil can cause floppy growth that’s more vulnerable to damage.
Poor drainage leads to root rot and weakened plants. If your soil is heavy clay, amend planting areas with compost or choose raised beds to improve drainage.
Watering and Maintenance
Established black eyed Susans tolerate drought well, though consistent moisture during their first growing season helps them develop strong root systems. Water deeply once a week during dry spells rather than frequent shallow watering.
Deadheading spent flowers encourages additional blooms and prevents excessive self-seeding. Cut back plants to basal foliage in late fall after they’ve gone dormant, or leave seed heads for winter bird food and cut back in early spring.
Choosing the Right Black Eyed Susan Varieties
Different Rudbeckia species and cultivars offer varied heights, bloom times, and characteristics. Selecting the right variety for your garden helps ensure success.
Rudbeckia hirta is the classic annual or short-lived perennial that self-seeds readily. This species reaches two to three feet tall and blooms from midsummer through fall.
Rudbeckia fulgida ‘Goldsturm’ is a reliable perennial that forms neat clumps about two feet tall. It blooms slightly earlier than R. hirta and doesn’t self-seed as aggressively.
Rudbeckia triloba (brown-eyed Susan) grows four to five feet tall with smaller, more numerous flowers. Its branching habit and extended bloom period make it excellent for naturalized areas and pollinator gardens.
What to Do If Deer Damage Your Plants
If deer browse your black eyed Susans, don’t assume the plants are lost. These tough perennials often recover from moderate damage.
Leave damaged plants in place and continue regular watering. Black eyed Susans typically send up new growth from the crown even after tops are eaten, especially if damage occurs early in the season.
Apply a balanced fertilizer at half strength to support recovery without forcing weak, sappy growth. Avoid high-nitrogen fertilizers that promote tender foliage deer find more palatable.
If repeated browsing prevents plants from establishing or flowering, implement stronger deterrents or choose more resistant alternatives. Persistent damage indicates your deer pressure is too high for this level of resistance.
Truly Deer-Proof Alternatives
If black eyed Susans don’t survive in your landscape despite protection efforts, consider these more reliably deer-resistant perennials with similar sunny color and easy care:
- Threadleaf coreopsis for similar yellow blooms and fine texture
- Blanket flower (Gaillardia) with red and yellow daisy flowers
- Russian sage for airy purple-blue flowers and silvery foliage
- Butterfly weed (Asclepias tuberosa) with bright orange blooms
- Catmint (Nepeta) for lavender-blue flowers and aromatic leaves
These plants have stronger deer resistance than black eyed Susans due to extremely coarse foliage, toxic compounds, or intensely aromatic oils. They’re not completely immune to browsing during severe food shortages, but deer consistently avoid them under normal conditions.
Final Considerations for Deer-Resistant Gardening
Managing deer in your landscape requires realistic expectations and layered strategies. Black eyed Susans offer good but not absolute resistance, making them a reasonable choice for areas with moderate deer pressure.
Rotate your deterrent methods throughout the season to prevent deer from adapting to a single strategy. Combine physical barriers for young plants, repellents during peak growing season, and strategic placement near the house.
Remember that “deer-resistant” never means “deer-proof.” Even plants deer strongly dislike may be browsed occasionally, especially by young deer learning what to eat or during population booms that strain food supplies.
Focus on creating a diverse garden with multiple deer-resistant species rather than relying heavily on any single plant. This approach distributes risk and creates a more resilient landscape that supports pollinators and looks attractive even if some browsing occurs.
Black eyed Susans remain an excellent choice for sunny gardens in deer country when you understand their limitations and provide appropriate protection during establishment. Their cheerful blooms, pollinator appeal, and low maintenance requirements make them worth the modest effort needed to help them thrive.
Continue exploring practical gardening advice and landscape solutions through more helpful Home and Garden articles that address the challenges and opportunities in your outdoor spaces.