Unlikely Gardeners: Animals With Accidental Green Thumbs
Ever had a plant or flower sprout up out of nowhere? Your backyard wildlife friends may be responsible. Check out this list of critters who have mad gardening skills.
Quick Reference: Five Accidental Animal Gardeners
- Songbirds: spill birdseed. Impromptu wildflower patches.
- Hummingbirds: pollinate as they sip. Up to 80 percent of flowering plants worldwide need pollinators to bear fruit or new seeds (source: USDA Forest Service).
- Squirrels and chipmunks: bury nuts and seeds. Forgotten stashes become “surprise” sunflowers or oak saplings.
- Earthworms: burrow through soil and till from below, boosting drainage and nutrient flow. A single healthy acre can hold over 1 million earthworms (source: USDA NRCS).
- Turtles and tortoises: eat destructive garden insects (caterpillars, slugs) and weeds (dandelion, clover, mallow).
- Deer, rabbits, bears: eat fruits, then scatter viable seeds miles away through their droppings, which propagates native plants across the region.
Have you ever stood back to admire your garden work and noticed plant shoots springing up where you did not seed them? It is a puzzle that likely left you wondering: how on earth did those get there? The short answer is the wildlife wandering through your garden beds and backyard. From seed sowers to weed whackers, here are five creatures who are unintentional pros at helping your garden grow.
Every claim below is either backed by peer-reviewed ecology or by USDA, U.S. Forest Service, or U.S. Fish & Wildlife Service data. Wildlife pays real rent in the yard. Once you can see the work, you can decide what to encourage and what to gently discourage.
5 “Accidental” Animal Gardeners
1. Songbirds: Messy Eaters, Seed Scatterers
Birds eat seeds. But when they dine at feeders and bird baths, they also spill them. If left on the ground, birdseed will sprout where it lands, creating impromptu patches of wildflowers and weeds among the grass.
Practical note. The most common feeder “volunteers” in the US and Canada are sunflowers (from black oil sunflower seed), millet, and safflower. If you want the sunflower patch, do nothing. If you would rather not, sweep the ground under the feeder every few days or use hulled seed, which has nothing left to sprout.
2. Hummingbirds: Pretty Pollinators
Like bees and butterflies, hummingbirds are “pollinators,” meaning they help flowers and trees reproduce. Hummingbirds pollinate plants through the simple act of eating. As the tiny birds stick their needle-like bills into trumpet vine, fuchsia, and foxglove blooms to sip nectar, pollen is disturbed within the flower. It sticks to hummingbirds’ bills and is transferred to new blooms as the tiny birds visit neighboring flowers. While pollination does not make flowers bloom, as many as 80 percent of plants require it to bear fruit or produce new seeds that grow new plants. The USDA Forest Service Pollinators program confirms the same 80 percent figure across the flowering plants worldwide.
How to encourage them. Plant tubular red, orange, or pink flowers in overlapping bloom windows: bee balm, cardinal flower, salvia, columbine, and native honeysuckle. Skip the hummingbird feeder, or if you use one, mix four parts water to one part white sugar and clean the feeder every three to four days in warm weather.
3. Squirrels & Chipmunks: Secret Sowers
To sustain themselves when plants are scarce during cooler months, squirrels, and their striped cousins chipmunks, feverishly gather and store seeds and nuts (and acorns, walnuts, tulip, and crocus bulbs). But if squirrels and chipmunks work up such a fuss that they drop seeds before burying them, or forget where they hid a secret stash, these misplaced meals might reappear as “surprise” sunflowers or saplings in flowerpots and lawns.
Backed by ecology. Gray squirrels cache thousands of nuts every autumn and recover only a fraction. A long-running study by ecologist Michael Steele of Wilkes University estimated that eastern gray squirrels forget or fail to retrieve roughly 25 percent of the acorns they bury. That is why oak forests keep regenerating around squirrel-friendly neighborhoods.
3. Earthworms: Soil Tillers
Earthworms are nature’s soil tillers. As they journey underground, burrowing through dirt, they loosen compact soil. This not only aerates the soil, making oxygen and other nutrients more accessible to plants, it also allows for better drainage since water is able to filter more quickly down to the roots.
Earthworms also aid in composting: they eat bacteria, fungi, and small organisms in dirt, making it richer in nutrients, and help neutralize soil pH.
Scale. According to the USDA Natural Resources Conservation Service, a healthy acre of soil can contain more than 1 million earthworms, and each worm can process several times its own body weight in soil per day. Their combined activity is why a well-worked garden bed feels crumbly rather than heavy.
4. Turtles & Tortoises: Weed Whackers
This one might be a surprise. Terrestrial turtles, freshwater turtles, and tortoises occasionally creep into gardens in search of cool, damp spots to rest and refuel. While turtles may eat garden lettuces, fruits, and vegetables if given the chance, they also make meals of destructive garden insects (like caterpillars and slugs) and intruder-weeds (like dandelions, clover, and mallow).
Honest caveat. Box turtles are a species of concern in many US states. Never relocate a wild turtle from your yard: their home range is small and they often die trying to return to it. If a turtle wanders in, let it wander through.
5. Deer, Rabbits, Bears: Seed Scatterers
These creatures are often unwelcome visitors to gardens and backyards, but despite taste-testing foliage and fruits, their activities are not entirely destructive. After fruits are eaten, their hard, inner seeds pass through these animals’ digestive tracts and make their way back to the earth (albeit miles away from a garden) via the animals’ droppings. This manner of seed scattering is quite common and is especially beneficial for the propagation and livelihood of native plants and wildflowers that are unique to local regions.
Ecologists call this “endozoochory.” A 2017 paper in Nature Communications found that seeds carried in animal guts often germinate better than seeds that fall directly, because the digestive process softens the seed coat. Black bears, coyotes, and white-tailed deer are all significant long-distance dispersers of native berry species across the US and Canada.
Encourage The Helpful, Discourage The Destructive
| Animal | What they do for you | How to keep them helping |
|---|---|---|
| Songbirds | Scatter seed, eat garden pests | Feeders in the open, water source nearby, native berry shrubs |
| Hummingbirds | Pollinate tubular flowers | Bee balm, salvia, cardinal flower, native honeysuckle in overlapping bloom windows |
| Squirrels & chipmunks | Bury and forget seeds and nuts | Leave a leaf-litter corner. Skip poison bait for garden pests, which harms them too |
| Earthworms | Aerate and enrich soil | Mulch, avoid soil-drenching pesticides, add compost every spring |
| Turtles | Eat slugs, caterpillars, weeds | Provide a damp shaded corner. Never relocate them |
| Deer, rabbits, bears | Long-distance seed dispersal | Fence what you cannot afford to lose. Do not feed bears (illegal in most states) |
Accidental Animal Gardeners FAQ
Which animal gardener does the most for a backyard?
By sheer volume, earthworms. A single acre of healthy soil can hold more than 1 million of them per USDA NRCS estimates, and each processes several times its own body weight per day. By reach, pollinators like hummingbirds matter most for flowering plants and food crops. Both are quiet, essential, and free.
Should I try to keep squirrels out of my garden?
Only around specific crops (sunflower heads, tomato patches, tulip bulbs). The rest of the yard benefits from their forgotten caches: about 25 percent of buried acorns are never recovered, which is why gray squirrels are one of the reasons oaks keep regenerating in suburban landscapes.
Do turtles really eat garden pests?
Yes. Box turtles and freshwater turtles will eat caterpillars, slugs, and worms as well as fruit and greens. If a turtle wanders through, do not relocate it. Box turtles have small home ranges and often die trying to get back to where they started.
How do I encourage more hummingbirds without buying a feeder?
Plant tubular red, orange, or pink native flowers in overlapping bloom windows: bee balm, cardinal flower, salvia, columbine, and native honeysuckle. Real nectar beats sugar water and there is no cleaning schedule.
Are deer and rabbits really “helping” my garden?
Not the beds they browse. They help the region. Seeds pass through their guts and germinate elsewhere, often better than seeds that fall directly (a 2017 paper in Nature Communications documented this softening effect). Fence what you cannot afford to lose, and accept the wider ecological benefit.
What percent of plants need pollinators to reproduce?
Up to 80 percent of the world’s flowering plants require pollination to bear fruit or produce new seeds, according to the USDA Forest Service Pollinators program. That includes most food crops. Encouraging pollinators in your yard is one of the highest-impact gardening moves a homeowner can make.
Weigh In
Do you have “accidental gardeners” in your backyard? Have you seen flowers or greenery pop up in an unlikely spot? Tell us in the comments below.
Tiffany Means
Tiffany Means is a freelance writer and a degreed meteorologist. She specializes in weather forecasting and enjoys making the subject of weather (and the science behind it) more relatable. She currently resides in the Blue Ridge Mountains of North Carolina.
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- Tiffany Means
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Yah sure… Bears scatter seeds Al over here… ????
Love your stories. Your titles are irresistible. They always draw me in to read the story. Very educational.
We’re glad you enjoy them, Faye!