We replanted our forests with trees almost nothing wants to eat. What the fwuck?
Walk through a young tree farm and it's quiet. No berries, no fruit, not much wildlife. Here's why: what animals really eat, the weed killer sprayed on berry bushes, the law that decides what gets replanted, and an idea to bring food back to the woods.

Go for a walk in a young tree farm in the Northwest. Row after row of the same fir trees, packed tight. It's dark underneath and quiet. You won't find apple trees, berry patches or much fruit of any kind. Mostly you'll find moss and fungus, because fungus doesn't need sunlight. Mushrooms "don't make their own food," the way plants do with sunlight (National Park Service). Food plants do need sun, and under those firs, there isn't any.
So here's the what-the-fwuck question: we cut down the forests and planted them back with trees that almost nothing wants to eat. Where are the animals supposed to get their food? And what if we planted some food back?
We dug into it. Some of the answer surprised even us.
The short answer
- Animals do eat young fir trees, but only a little, and mostly because that's what's there. What they really want is grass, wildflowers, shrubs and berries (Oregon Forest Resources Institute).
- When young tree farms grow in thick, the ground gets too dark for food plants. Forestry books call it "a period of low biodiversity" (Forest Measurements textbook).
- Many tree farms spray weed killer to kill the berry bushes so the firs grow faster (Oregon State University Extension).
- Oregon's replanting law only counts trees that can become "logs, fiber, or other wood products" (Oregon rule 629-610-0050).
- When the wild food runs out, animals like bears come looking in town (Colorado State University).
- Our idea: plant the berries, fruit and nut trees that naturally grow in each area, in places where they'd actually grow and stay, like power-line corridors and the edges of clear-cuts. Feed the whole food web, maybe slow some fires, and feed some people too.
What animals really eat
Deer and elk do nibble young Douglas-fir, mostly in winter. But in a classic study of deer and elk diets in eastern Oregon and Washington, Douglas-fir was only about 3% of their winter food. Three kinds of shrubs were each more than 10% (U.S. Forest Service).
A state forest group says it plainly: "Deer and elk need nutritious grasses, forbs and shrubs common to open areas following fire, storm events or logging" (Oregon Forest Resources Institute). (Forbs are wildflowers and other leafy plants.)
So fir is filler food. Animals eat it when there's nothing better around, and young firs mostly grow where people just planted them.
Bears are a special case. In spring, they peel the bark off young firs to lick the sugary layer underneath. One bear can kill about 70 trees in a day. Timber companies in Washington and Oregon now run more than 900 feeding stations and put out over half a million pounds of bear food pellets a year, just so the bears leave the trees alone (Washington Forest Protection Association).
Read that again. We feed the bears pellets because the forest we planted doesn't have enough food for them.
The berry stage, and why it's disappearing
After a fire, a big storm or logging, there's a short time when the forest is open and sunny. Scientists call it the "early" stage. It's "the only period when tree canopies do not dominate," and it's packed with plants and life (Swanson et al., U.S. Forest Service). That's when berries, wildflowers and shrubs take over.
That stage is where the animals eat:
- A big study by 21 scientists looked at elk food across 11 million hectares of western Oregon and Washington. The best summer food was on less than 5% of the land, "primarily" in that early, open stage, and they warned about "declines" of it (Cook et al., Wildlife Monographs, 2018).
- Oregon's black-tailed deer dropped from about 452,000 in 1979 to about 320,000 in 2004. The state wildlife agency blamed it partly on losing that open, early forest (Oregon Department of Fish and Wildlife).
And here's the part that makes you say it out loud.
It's a whole food web, not just deer
A forest is supposed to work like a circle. Plants feed small animals, and small animals feed bigger ones. When the open, early forest is full of plants, it's also full of insects, and "these insects, in turn, provide food for songbirds, bats and reptiles" (Oregon State University Extension). Berries and seeds feed mice, chipmunks and birds. Those feed hawks, owls, foxes, bobcats and cougars. Take out the food at the bottom, and the whole circle gets thinner.
Is that why animals are showing up in town?
People often say animals come into towns because we took their land. That's part of it. But food matters too. A Colorado State University study of bears in Aspen found the bears actually prefer wild berries and acorns over trash. "When natural food sources were lean," the researchers said, the bears went after "more easily attainable human food" (Colorado State University). In other words: when the wild food runs out, the bears come to us.
The berry bushes get sprayed on purpose
After replanting, many tree farms spray weed killers to get rid of the shrubs and leafy plants competing with the baby firs. Foresters call it "conifer release." Oregon State University's guide lists salmonberry, a berry bush, as one of the top plants to kill (OSU Extension).
In one Oregon experiment, a normal amount of spraying, the kind used on more than 2.5 million hectares in the region, left "simplified, low-cover plant communities." Heavy spraying left so little food that browsing animals hardly mattered at all (Stokely et al., 2018).
So the one time a tree farm could be full of berries, the berries are often sprayed so the timber grows faster.


