Introduction
There is nothing quite like the excitement of seeing the first green shoots of a dahlia poke through the soil in late spring. These spectacular flowers, with their intricate petals and vast array of colors, are a highlight for many home gardeners. At Longfield Gardens, we want to ensure your gardening experience is as rewarding as possible, from the moment you tuck your tubers into the ground to the day you cut your first bouquet.
One question that often arises as planting season approaches is whether local wildlife, specifically squirrels, will make a meal out of your hard work. While squirrels are famous for their curiosity and their love of burying treasures in freshly turned earth, they are rarely the primary threat to dahlia tubers. Understanding why they dig and how to guide them away from your planting beds is the key to a flourishing summer garden.
In this guide, we will explore the relationship between squirrels and dahlias, identify the real culprits behind tuber damage, and provide practical, easy-to-implement strategies to keep your garden safe. Our goal is to help you feel confident and prepared so you can focus on the beauty of your blooms.
Do Squirrels Actually Eat Dahlia Tubers?
The short answer is that squirrels do not typically eat dahlia tubers. Unlike tulip bulbs or crocus, which are high in starch and taste like a treat to many rodents, dahlia tubers are not high on a squirrel's menu. Most squirrels find the taste of the tuber unappealing and will generally leave them alone once they realize they aren't a nut or a preferred food source.
However, just because they don't find them delicious doesn't mean they won't interact with them. You may find your tubers dug up and left on the surface, or you might find small "investigative" holes throughout your dahlia bed. This behavior is often mistaken for herbivory, but it usually stems from the squirrel's natural instinct to forage and store food.
If you find a tuber that has been partially nibbled and then discarded, it is likely a squirrel "tasting" the tuber and deciding it wasn't worth the effort. While this can be frustrating for the gardener, the good news is that the tuber itself is rarely the target of their appetite.
Key Takeaway: Squirrels are curious foragers. They may dig up a dahlia tuber while looking for something else, but they rarely consume the tuber because they find the flavor unpalatable.
Why Squirrels Dig in Dahlia Beds
If squirrels don't want to eat your dahlias, why do they seem so intent on digging in your garden beds? Understanding this behavior makes it much easier to prevent it without feeling like you are constantly at war with your backyard neighbors.
Freshly Turned Soil
Squirrels are highly attracted to loose, freshly turned soil. To a squirrel, a patch of soft earth looks like the perfect place to hide a winter's supply of acorns or walnuts. When we prepare a garden bed for dahlias by loosening the soil and adding compost, we are essentially creating an irresistible "blank canvas" for a squirrel's caching instincts.
Mistaken Identity
When you plant a dahlia tuber, you are burying an object that is roughly the same size and shape as something a squirrel might have buried earlier. If a squirrel sees you planting or catches the scent of disturbed earth, it may return later to see if you were hiding something "good," like a large nut. They dig up the tuber, realize it isn't what they were looking for, and move on—often leaving the tuber exposed to the elements.
Foraging for Water
In periods of extreme heat or drought, squirrels and other wildlife may dig in garden beds looking for moisture. The succulent nature of a dahlia tuber means it holds water, and a desperate squirrel might take a bite out of a tuber simply to stay hydrated. Keeping a birdbath or a small water station in a different part of the yard can often satisfy this need and keep them away from your plants.
Use of Fragrant Fertilizers
Many traditional "bulb boosters" or fertilizers contain bone meal or blood meal. While these are excellent sources of nutrients for the soil, they have a strong scent that mimics the presence of a food source or a predator. This scent can trigger a squirrel's curiosity, leading them to dig up the entire area to investigate the source of the smell.
Identifying the Real Tuber Eaters
If you discover that your dahlia tubers are actually disappearing or being eaten underground, the culprit is likely not a squirrel. Several other common garden residents have a much higher affinity for tubers and roots.
Voles and Mice
Voles, often called meadow mice, are the most common reason for missing tubers. These small rodents create tunnels just beneath the surface of the soil or use existing mole tunnels to travel. Unlike squirrels, voles are herbivores that specifically target the root systems and tubers of many ornamental plants. If a dahlia tuber is eaten from the bottom up while still in the ground, voles are the most likely suspects.
Pocket Gophers
In some regions of the US, pocket gophers can be a significant challenge. These animals live almost entirely underground and can pull an entire plant down into their tunnel system. If your dahlia plant seems to vanish into the earth overnight, you are likely dealing with a gopher rather than a squirrel.
Slugs and Snails
While they don't eat the tubers themselves, slugs and snails are very fond of the tender green shoots that emerge from the tuber in late spring. If you see that your dahlia stems have been chewed down to the soil line as soon as they appear, it is often a sign of slug activity. This damage is frequently blamed on squirrels or rabbits, but a close look for silvery slime trails will reveal the true identity of the visitor.
Rabbits
Rabbits are another common visitor that may nibble on the foliage of your dahlias. However, like squirrels, they are not interested in the tubers buried underground. Their damage is strictly above-ground, consisting of clean, angled cuts on stems and leaves.
What to do next:
- Observe the type of damage: Are there tunnels? It’s voles. Are there surface holes? It’s squirrels.
- Look for slime trails to rule out slugs.
- Check for clean-cut leaves to see if rabbits are visiting the foliage.
Simple Ways to Protect Your Dahlias
Protecting your dahlias doesn't have to be a complicated or stressful chore. By focusing on a few simple physical barriers and planting techniques, you can ensure your tubers stay exactly where you put them.
Use Hardware Cloth or Chicken Wire
One of the most effective ways to protect dahlia tubers from both squirrels and voles is to create a physical barrier. You can line your planting hole with a "basket" made of half-inch hardware cloth or chicken wire.
- Dig a hole slightly larger than the tuber.
- Form the wire mesh into a basket shape and place it in the hole.
- Fill the bottom with a bit of soil and place the tuber inside.
- Fill the rest of the hole with soil. This allows the roots and shoots to grow through the mesh while preventing larger rodents from reaching the main body of the tuber.
Top-Dressing with Heavy Mulch or Gravel
Since squirrels are looking for easy-to-dig soil, making the surface of your garden bed less inviting can work wonders. After planting your dahlias, consider top-dressing the area with a layer of coarse gravel or large decorative stones. Squirrels generally dislike the feeling of rough textures on their paws and will move to a spot with easier digging.
The "Potted Start" Method
Many successful gardeners choose to start their dahlias in pots before moving them to the garden. By planting the tuber in a container and letting it develop a strong root system and several inches of growth in a protected area (like a porch or greenhouse), you bypass the "freshly turned soil" phase that squirrels find so attractive. Once the soil in the garden has settled and the plant is established, you can transplant the entire root ball. The squirrel is much less likely to dig up an established plant than a bare tuber in fresh dirt.
Pinning Down Mesh
If you are planting a large area of dahlias, you can lay a sheet of chicken wire or plastic garden netting flat across the entire surface of the bed. Use landscape staples to pin the edges down. The dahlia shoots will grow through the holes in the mesh, but squirrels will be unable to dig through the barrier to reach the tubers. This is a very effective and low-profile solution for the first few weeks after planting.
Using Scents and Textures as Deterrents
If you prefer not to use physical barriers, there are several scent-based and textural deterrents that can help discourage squirrels from visiting your dahlia beds. It is important to remember that these methods often depend on your local weather and the persistence of your local squirrel population.
Scent-Based Repellents
Squirrels have a very keen sense of smell, and certain odors are naturally repulsive to them. Garlic, peppermint, and cayenne pepper are popular choices for home-made deterrents.
- Garlic Sprays: A simple spray made of crushed garlic and water can be applied to the soil surface around your dahlias.
- Granular Repellents: Commercial products containing dried blood or putrescent egg solids can be effective, though they may require reapplication after rain.
- Essential Oils: Peppermint or rosemary oil can be used on cotton balls or mixed into a spray, but their effectiveness is often short-lived in an outdoor environment.
Avoid Fragrant Fertilizers
As mentioned earlier, avoid using bone meal or blood meal in the top layers of your soil. If you need to use these for their nutrient content, mix them deeply into the bottom of the planting hole and cover them with several inches of plain soil before placing your tuber. This helps mask the scent from curious noses.
The Power of Alliums
One of the most natural ways to deter squirrels and other rodents is to plant things they dislike nearby. Members of the allium family—including ornamental alliums, garlic, and onions—have a pungent scent that many animals find offensive. Planting a border of alliums around your dahlia bed can act as a natural "no-entry" sign for wildlife. We ship a wide variety of allium bulbs at Longfield Gardens that can be integrated into your landscape for both beauty and protection.
Coffee Grounds
Many gardeners find that spreading used coffee grounds around the base of their plants helps deter squirrels. The strong scent and the gritty texture are generally unappealing to them. As a bonus, coffee grounds can help improve soil structure as they break down, though they should be used in moderation to avoid affecting soil pH significantly over time.
Creating a Wildlife-Friendly Balance
Gardening is always more enjoyable when we view it as a partnership with nature. While we want to protect our dahlias, we can also take steps to make the rest of our yard more inviting to wildlife, which often reduces the pressure on our flower beds.
Diversify Your Food Sources
If squirrels are digging in your garden, it’s often because they are hungry or looking for resources. Maintaining a dedicated squirrel feeder with corn or sunflower seeds in a far corner of the yard can give them a reason to stay away from your ornamental beds. When squirrels have a reliable, easy food source, they are less likely to spend time foraging in your flower gardens.
Provide a Water Source
As noted, some digging is simply a search for moisture. A clean birdbath or a shallow dish of water kept away from the dahlias can satisfy this need. Make sure to change the water regularly to keep it fresh and prevent mosquitoes.
Accept a Little "Garden Activity"
Sometimes, a squirrel will dig a small hole, realize there's nothing of interest, and move on. In many cases, this doesn't actually harm the dahlia. If you see a hole, simply fill it back in and firm the soil. Most dahlia tubers are resilient and can handle a little bit of soil disturbance as long as they aren't physically damaged or left exposed to the sun and air for too long.
Planting for Resilience
When you choose high-quality tubers and plant them at the correct depth (about 4 to 6 inches deep), they are much harder for a squirrel to accidentally disturb. A healthy, vigorous tuber from a trusted source will have the energy to recover from minor disruptions and continue growing toward a spectacular bloom.
Planting Depth and Spacing: The Quiet Winners
Success with dahlias often comes down to the basics. Getting the planting depth and spacing right not only helps the plant grow better but also provides a level of natural protection against curious animals.
The Right Depth
Plant your dahlia tubers about 4 to 6 inches deep. This depth provides a stable environment for the roots to develop and keeps the tuber tucked safely away from the surface where squirrels are most active. When the tuber is buried deeply, the scent of the freshly disturbed earth is also more muffled, making it less likely to attract attention.
Proper Spacing
Dahlias need room to breathe. Depending on the variety, they should be spaced 12 to 24 inches apart. Proper spacing allows for good air circulation, which prevents fungal issues later in the season. It also makes it easier for you to see any signs of digging or pest activity early on. When plants are too crowded, it’s easy for a vole tunnel or a squirrel hole to go unnoticed until the damage is more extensive. See this dahlia spacing guide for additional planting guidance.
Firming the Soil
After you have placed your tuber and filled the hole, gently but firmly press down on the soil with your hands. You want to remove any large air pockets and make the ground feel solid. Loose, fluffy soil is much easier for a squirrel to dig through than soil that has been firmed down. This simple step can significantly reduce the "attractiveness" of your dahlia bed to a passing squirrel.
Key Takeaway: Correct planting depth (4-6 inches) and firming the soil are your first and best lines of defense against curious squirrels.
Timing Your Protection
The most critical time to protect your dahlias is the first two to three weeks after planting. This is when the soil is loosest and the scent of the tuber is most apparent. As the soil settles with rain and the plant begins to establish roots, the risk of squirrel interference drops significantly.
The First Forty-Eight Hours
Most digging happens within the first 48 hours of planting. If you can, keep a close eye on your garden during this window. If you notice any activity, you can immediately implement a temporary barrier like a piece of weighted-down netting or a few decorative rocks.
Watching the Weather
Rain is actually a gardener's friend when it comes to squirrel prevention. A good rainfall helps settle the soil and washes away the scent of the gardener's hands and the freshly moved earth. If no rain is in the forecast, a light watering after planting can achieve the same effect. Just be careful not to overwater, as dahlia tubers prefer to stay on the drier side until they have active green growth above the soil.
Transitioning to Summer
Once your dahlias are about 6 to 12 inches tall, they are generally "out of the woods" regarding squirrel digging. At this point, you can remove any temporary surface netting or barriers. The plants are now focused on upward growth, and the squirrels will have moved on to other seasonal interests in the yard.
Conclusion
Protecting your dahlias from squirrels is a manageable part of the gardening journey. While these furry visitors can be persistent, they aren't actually looking to eat your tubers—they are simply following their natural instincts to dig and explore. By using physical barriers like wire mesh, choosing textures they dislike, and getting the planting basics right, you can enjoy a season full of stunning blooms without the stress of constant garden repairs.
At Longfield Gardens, we believe that every gardener can find success by focusing on a few key steps and staying observant. Gardening is meant to be a rewarding experience, and with a little bit of preparation, your dahlias will be the stars of your summer landscape.
- Squirrels don't like the taste: They are curious, not hungry for dahlias.
- Physical barriers work best: Hardware cloth or chicken wire provides permanent peace of mind.
- Start in pots: Giving plants a head start makes them less vulnerable once they hit the garden.
- Firm the soil: Removing the "fluff" from your garden beds makes them less attractive for caching nuts.
High-quality tubers and a little bit of protection go a long way. Take the time to settle your plants in securely, and they will reward you with a magnificent display from midsummer all the way to the first frost.
FAQ
Will squirrels eat my dahlia flowers?
Squirrels rarely eat dahlia flowers. Their diet mainly consists of seeds, nuts, and occasionally fruits or succulent greens. If you see your dahlia flowers being eaten, the more likely culprits are Japanese beetles, earwigs, or even deer. Squirrels are far more interested in the soil at the base of the plant than the petals at the top.
Can I use coffee grounds to keep squirrels away from my dahlias?
Yes, many gardeners find used coffee grounds to be an effective and natural deterrent. The strong aroma and gritty texture are unappealing to squirrels. Simply sprinkle a thin layer of grounds around the base of your plants. As an added benefit, they add a small amount of organic matter to the soil as they decompose.
Does bone meal attract squirrels to dahlia tubers?
Yes, bone meal can attract squirrels and other dogs or rodents because it has a strong, "animal-like" scent. If you need to add phosphorus to your soil, it is better to mix the bone meal deep into the planting hole or use a liquid fertilizer once the plant is established. This helps prevent squirrels from digging in search of a nonexistent food source.
What is the most effective way to stop squirrels from digging up tubers?
The most effective method is a physical barrier. Laying chicken wire or plastic bird netting flat over the soil and pinning it down with landscape staples prevents squirrels from reaching the earth. The dahlias will grow through the holes in the wire, but the squirrels will find the barrier impossible to dig through, leading them to look elsewhere. For more planting advice, see this step-by-step dahlia planting guide.
