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Science-based gardening information for Colorado communities from CSU Extension, Denver Botanic Gardens, and Green Industries of Colorado.

2303 – Squirrel Damage to Trees   arrow

Squirrels can cause a lot of damage in the garden. This is especially true in years when untimely spring frosts cause poor crops of crab apples and other fruits.

What do squirrels do to trees?

In the summer, a squirrel normally eats fruits, berries and succulent plants, and, when available, fungi, insects, animal matter and corn. During the winter, when stored food runs short, squirrels may eat bark. In the spring, squirrels prefer swelling tree buds.squirrel

What about flowers?

In addition to damaging trees, squirrels also will often eat tulip bulbs and crocus corms. Daffodil bulbs are poisonous to squirrels and generally remain untouched. Lawns also are damaged from squirrels storing and digging for food.

What is the main killer of squirrels?

Squirrel populations periodically rise and fall. A squirrel’s predators include hawks and owls, but disease, food availability and environmental extremes are bigger factors in population swings.

How can I control squirrels in my yards?

Controlling squirrels is difficult, because there are so many, and tree habitats are difficult to modify to exclude squirrels. Also, repellents are short-term solutions, may not always be effective, and must be renewed frequently.

How do I go about trapping squirrels?

Trapping and relocating squirrels is permissible without a permit as long as the following conditions are met:

  • The CDOW has been notified in advance.
  • The relocation site is appropriate habitat for the species.
  • Permission has been obtained from the landowner or managing agency where the animal will be released.
  • The relocation must occur within 10 miles of the capture site.

Can I trap a squirrel without a permit?

It is also permissible to hunt, trap, or take squirrels without a license (although generally, firearms are not permitted to be discharged within cities).

Is relocating squirrels a permanent solution?

Be aware that even if you remove one squirrel, others will likely move in to the newly vacant area, so this at best a temporary solution. Also, relocated squirrels can return from up to 15 miles away. Relocating is not always the kindest option; relocated squirrels may not survive in another squirrel’s territory, or they may be disoriented and vulnerable to being hit by a car. For these reasons, it is better to learn to garden with squirrels.

What is the best permanent solution to squirrels in my garden?

Excluding squirrels from the garden is the best long term solution. A 1” wire mesh wrap may be used to protect tulip and other bulbs. Protect garden produce with mesh cages. Consider removing bird feeders, since spilled seed attracts squirrels, and it is difficult to squirrel proof a feeder.

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