The Landscape Arboretum has a sizable oak collection with 15 species and 2 cultivars and 52 specimens. Oaks, as a rule, are one of our longest lived trees, some reaching over 500 years old. Of the many species world-wide, relatively few will grow in Minnesota, but those that do are exceptionally beautiful. The fruit, (acorns), are great attractions for squirrels and other animals and so are good for natural areas but could be considered messy in the home landscape. They can be difficult trees for the boulevard as they like plenty of room for their roots.