Which type of plant is least attractive to rats and mice?

Wineglass-shaped shrubs are least attractive to rats and mice due to their structural characteristics. These shrubs typically have a shape that makes it challenging for these rodents to find suitable hiding places, nesting spots, or food sources. The shape provides a less inviting environment, making it difficult for rats and mice to maneuver through and around the branches.

In contrast, thorny bushes can be somewhat less appealing because of the physical deterrent posed by the thorns, but they may still offer shelter or nesting opportunities. Fruit-bearing trees attract rodents due to the availability of food sources, and low-lying ground covers can provide easy access to both shelter and food, making them more appealing environments for these pests. Thus, wineglass-shaped shrubs stand out as the least attractive option for rats and mice.