Mums are sometimes listed as “deer-resistant” in gardening guides, but this is misleading. Chrysanthemums are not toxic to deer, and hungry deer will eat them without hesitation. While deer may prefer other plants when food is abundant, mums are absolutely at risk — especially in fall when forage becomes scarce.
Here is a real-world example of deer feeding on mums:
Deer caught feeding on chrysanthemums in a home garden.
How to Keep Deer from Eating Your Mums
The core strategy is exclusion: keep deer out of the space where your mums grow. But there are multiple layers of defense you can combine for the best results.
Here is a complete toolkit of proven methods, from free DIY options to commercial products.
Human Hair
Deer Repellent Spray
Ultrasonic Repeller
Guard Dog
8-Foot Fence
Proximity to the House
For a comprehensive guide on keeping deer out of your entire garden including deterrents that work for vegetables and other flowers, see our full article on how to keep deer out of your garden.
How to Take Care of Mums
Protecting your mums from deer is only one part of the equation. Healthy, well-maintained mums are also more resilient when they do suffer nibbling damage. Here is a complete care guide covering every stage of the growing season.
Select a Healthy Plant
Start with quality stock. When buying mums from a store or nursery, avoid plants with wilted stems, yellowed leaves, or signs of pest damage as these problems rarely resolve on their own and will make your maintenance far harder.
Visit the store the day new stock arrives, when plants are freshest. Better yet, contact a local mum grower directly, visit their operation, and hand-pick vigorous plants. Starting healthy saves you months of remediation.
Place Plants in an Adequately Large Pot
At the time of purchase, mums are typically root-bound in their nursery containers. To keep them healthy and vibrant, repot them into a larger container using a good-quality potting soil mix.
Always place a layer of soil at the bottom of the new pot before transferring to avoid damaging the roots during the transition. A pot that is 2–3 inches larger in diameter than the nursery pot is a good starting target.
Keep Plants Away from Artificial Light
Mums are short-day plants, which means they require long periods of darkness to trigger flowering. Exposure to street lights, porch lights, or indoor lamps at night interrupts this cycle and can prevent or delay blooming.
To maximize flower production, place mums where they receive natural light during the day and are shielded from artificial light after dusk. Switching off nearby lights during the evenings will make a noticeable difference in bloom quality.
Water Correctly — at the Roots, Not the Leaves
A common mistake is watering mums from the top and letting it trickle down over the foliage. This promotes fungal diseases and should be avoided entirely. Instead, direct water as close to the root zone as possible, saturating the soil not the leaves or stems.
Water more frequently in the first few weeks after potting. After that, aim for approximately one inch of water per week. If you notice leaves beginning to wilt outside of extreme heat, increase your watering frequency wilting is an early warning sign of moisture stress.
Manage Pests and Disease Quickly
Aphids appear in all USDA growing zones and can be removed with a strong jet of water no chemicals necessary for minor infestations. In tropical climates, mums may be attacked by boring insects, typically moth or beetle larvae.
Control these by clearing weeds from around the plant and removing infested leaves and stems.
For severe infestations, apply Bacillus thuringiensis (Bt) pesticide, using a quality garden sprayer such as the Chapin 20541 to thoroughly coat leaves and stems.
For fungal problems such as stem rot, pythium root rot, botrytis blight, bacterial leaf spot, or white rust treat immediately. Natural fungicides including neem oil, garlic oil, and sulfur are effective.
Mix ½ to 4 teaspoons of concentrate per gallon of water and apply until the infestation clears. Always wear garden gloves and safety glasses when applying any chemical treatment.
Fertilize for Best Blooms
Mums respond well to feeding. Use a balanced all-purpose fertilizer at a ratio of 6-12-6 (nitrogen-phosphorus-potassium), applied at a rate of ½ to 1 lb per 100 square feet. Liquid fertilizers such as Miracle-Gro or Peters are also excellent options when applied once per month.
Apply fertilizer during the vegetative growth phase — before flower buds form — to avoid triggering premature blooming, which reduces total flower yield.
Pinch the Stem Tips Throughout the Growing Season
Pinching removing the growing tip of each stem encourages the plant to branch out rather than grow tall and spindly.
The result is a bushier plant with more flower sites, sturdier stalks that don’t flop over, and a longer overall blooming period. Pinch regularly throughout spring and early summer, stopping around mid-July to allow flower buds to set.
Deadhead Spent Flowers to Extend Blooming
Removing dead flowers a practice called deadheading keeps the plant looking tidy and has been shown to extend the overall blooming period by redirecting the plant’s energy away from seed production and back into flowering.
Use your fingers or a pair of pruning shears to remove spent blooms. Cut just above the next set of healthy leaves to encourage new growth from that node.
Protect Mums Through Winter
In northern states, even varieties marketed as “hardy mums” can suffer significant winter damage. The key is to maintain consistent soil moisture going into winter dry roots are far more vulnerable to frost damage than moist ones.
After several hard frosts, apply a layer of straw mulch over the crowns. Do not remove the dead plant material yet as it provides natural insulation through the coldest months.
Once spring growth appears, remove the old material and straw, then apply fresh cypress or hardwood mulch around the base to retain moisture through the growing season.
What Other Animals Eat Mums?
Deer are not the only garden visitors with an appetite for chrysanthemums. Several other common backyard wildlife species will target mums, particularly as fall approaches and food becomes scarcer.
| Animal | Typical Damage Pattern | Primary Deterrent |
|---|---|---|
| Deer | Ragged, torn edges on leaves and stems; whole plants stripped overnight | 8-ft fence, repellent sprays, human hair |
| Squirrels | Dug-up roots and bulbs; scattered soil around pots | Wire mesh over soil surface; repellent granules |
| Rabbits | Clean, angled cuts on stems low to the ground | Low chicken-wire barrier around plants; vinegar deterrent |
| Groundhogs | Large sections of foliage consumed; tunneling near roots | Underground fence barrier; motion-activated sprinklers |
| Chipmunks | Scattered seeds and petals; small burrows near plant bases | Repellent granules; remove nearby seed sources |
How to Tell If Deer Specifically Are Eating Your Mums
Ragged, torn, and jagged edges. Deer cannot make clean cuts since they lack upper incisors. The damage looks ripped, not snipped.
Damage appears up to 5–6 feet above the ground. Lower damage closer to soil level is more consistent with rabbits or groundhogs.
Look for oval-shaped dark pellets near the plant, typically in small clusters. Deer droppings near the mums confirm their presence.
Deer feed primarily at dawn and dusk. If damage appears overnight or is significantly worse in the morning, deer are the most likely culprit.
- The mum is one of the most popular flowers in the world, second only to the rose in global cultivation.
- There are over 40 recognized species of chrysanthemums, with thousands of additional varieties created through selective breeding.
- Mums were first cultivated in China as a flowering herb, with records dating back over 2,500 years.
- They come in a remarkable range of colors: yellow, purple, burgundy, red, bronze, white, pink, and lavender among others.
- Mums that carry more than one flower per stem are classified as spray chrysanthemums.
- Mum flowers bloom in dozens of distinct forms: daisy-like, pompon, decorative, button, and more making them among the most morphologically diverse flowers grown today.
- Mums are composite flowers each flower head is actually made up of dozens or hundreds of tiny individual florets. The outer “petals” are ray florets; the center is made up of tightly packed disk florets.
- Certain mum varieties are used in Asia to brew chrysanthemum tea, prized for its mildly sweet flavor and traditional medicinal properties.
- Deer do eat mums. Chrysanthemums are not toxic to deer, despite common claims to the contrary.
- Signs of deer damage include jagged, torn leaf edges and deer droppings near the base of plants.
- Effective deterrents include human hair, scented repellent sprays, ultrasonic devices, guard dogs, and an 8-foot fence.
- Potted mums can be moved indoors or onto a well-lit porch at night to protect them from deer.
- Besides deer, mums are eaten by squirrels, rabbits, groundhogs, and chipmunks each with a different damage signature.
- Mums are short-day plants and need darkness to flower artificial light at night delays or prevents blooming.
- Deadheading spent flowers and pinching stem tips both extend the blooming period and improve plant structure.
- Hardy mums in northern states still need mulching and moisture protection to survive harsh winters.
Frequently Asked Questions
Do deer eat mums?
How do you tell if deer are eating your mums?
Do deer eat potted mums?
Do mums grow back after deer eat them?
Are mums toxic to deer?
Conclusion
Deer eat mums that’s the clear takeaway. Don’t rely on “deer-resistant” labels when it comes to chrysanthemums, particularly if your garden borders woodland or open fields where deer are active. The good news is that protecting your mums doesn’t have to be expensive or complicated.
Start with the simplest deterrents human hair, scented sprays, or moving potted mums closer to the house and escalate to fencing if deer pressure is heavy.
Combine deer protection with good care practices and you’ll have thriving, full-blooming mums through the entire fall season.
If you’re growing mums from scratch, prioritize healthy stock from the start. A robust plant handles both pest pressure and occasional deer damage far better than a struggling one.
