Lush green trees throughout Chicago’s beautiful parks and gardens make the skyline even more scenic

The spring season is an exciting time in the Chicago area because residents are treated to warmer weather, more hours of sunlight, and blooming trees and flowers all at once.  Now that the spring weather has finally arrived in Chicago, residents can expect to see the flowers and foliage of our trees and shrubs fill out over the next several weeks.  One of the many unique characteristics about Chicago that makes it such a great city is the expansive urban forestry throughout the city and its suburbs, and the wide diversity of tree species it includes.

Before Chicago was incorporated as a city in 1837, there were only 22 different tree species in the area.  It may be surprising to know that according to the Morton Arboretum, there are now 218 officially recorded tree species just in the city of Chicago alone.  That is a significant increase in tree species in a span of about 180 years.  The biggest factor in this increase is the residents of Chicago themselves as most of Chicago’s trees are found on residential property.  Many residential areas in Chicago are tucked away from the busiest and dirtiest streets where the air is warmer and the soil is richer in nutrients.  This creates ideal conditions for many of Chicago’s most common trees to thrive.


Hendricksen Tree Care offers professional tree care services throughout the Northwest Chicago suburbs such as Glenview & Northbrook, IL

The diversity of tree species in Chicago and its suburbs is part of what makes the spring season so special in this area.  However, in order to keep Chicago trees beautiful, they need the proper care and protection from diseases, pests, and other factors that can cause harm.  At Hendricksen Tree Care, our professional arborists are compassionate about caring for the many different tree species in the Chicago area.  We provide complete tree services, including tree care, maintenance, and pruning, for trees on residential and commercial properties.  Our arborists have extensive knowledge about the most common trees in the area and can effectively treat trees affected by insects or disease.

One of the ways that we at Hendricksen Tree Care would like to show our commitment to caring for the trees of Chicago is to feature a blog series about the most common types of trees in the area.  Knowing about the tree species on your property can help you take better care of them so that they live long and healthy lives.  Below are brief descriptions of the most common tree species in the Chicago area.  In the coming weeks & months, we will feature a different one of these tree species in its own tree blog that will include in-depth information about the species and the best ways to provide care.

If you do need a professional arborist to provide tree care services in the north or northwest Chicago suburbs, please do not hesitate to contact Hendricksen Tree Care.

Oak Trees

Before the development of Chicago, oak trees were the most common trees in the area.  These large trees provided food and shelter for much of the local wildlife.  Oak trees need plenty of space to grow so as Chicago and its suburbs developed, these trees became scarce.  The only way new oak trees will appear in the Chicago area is if they are planted.

There are many species of oak found throughout the world in the northern hemisphere.  Oaks include both deciduous and evergreen species and many oak species can grow up to 80 feet tall and 80 feet wide.  Oak leaves can be serrated or smooth and they grow in spirals that also include acorns which contain an oak seed.  Oak trees native to the Chicago area include the white oak, swamp white oak, shingle oak, and Chinkapin oak.


White flowers are Common on Dogwood Trees Throughout the Chicago, IL Suburbs

Dogwood Trees

Dogwood trees are mostly deciduous trees that can be identified by their bark, berries, and flower clusters.  There are many types of dogwood trees found throughout the U.S. These trees can grow to be 15 to 25 feet tall with leaves that have smooth edges and curving veins.  The flowers may look different between the different species of dogwoods, but all dogwood species have clusters of flowers that are typically white in color.  All dogwoods also bear fruits called drupes which are edible, brightly colored berry-like fruits that contain hard pits.  The Pagoda dogwood and Cornelius cherry dogwood are native to the Chicago area.

Ash Trees

Ash trees are tall, flowering trees that are part of the same family of species that includes olives and lilacs.  These trees typically grow 40 to 60 feet in height, but it is possible for some species of ash to reach 80 feet.  Ash species have simple leaves that grow opposite on their whorls and their flowers grow in clusters.  The appearance of the flower will differ slightly depending on the species and sex of the tree.  Ash flower clusters tend to consist of small while-pedaled flowers or green and purple clusters.

Just a few years ago, the green and white ash trees were common throughout Chicago.  Unfortunately, ash trees have been disappearing from the region due to the damage caused by the invasive emerald ash borer.

Sassafras Trees

Sassafras is a genus of tree that contains three different species found in North America and East Asia.  The species Sassafras albidum is the species of sassafras that is native to the Chicago area.  These trees are deciduous and can grow anywhere from 15 to 40 feet in height on average.  Sassafras trees have also been known to exceed this height as the tallest sassafras in the world is over 100 feet.  These trees are known for their fragrance and the unusual characteristic of having up to three different leaf patterns on the same tree.  The flowers of a Sassafras albidum are yellow in color and have six petals.  These trees are dioecious which means that male and female flowers grow on separate trees.  Female sassafras trees also bear dark blue drupes as its fruit.

The white sassafras, red sassafras, and silky sassafras can be found in the Chicago area.

Willow Trees


Weeping Willow Trees are Common Around Lakes in the Chicago Suburbs such as Arlington Heights & Park Ridge, IL

There are around 400 species of willow trees that are found throughout the Northern Hemisphere.  Willow trees have watery sap, slender branches, and a strong, expansive root system.  They can grow between 6 and 8 feet per year and reach up to 50 feet when fully grown.  Most willow trees are deciduous with elongated, feather-veined leaves that are typically serrated.  The flowers of a willow tree grow as catkins in clusters that cause the branches the droop, giving the willow its signature look.  The black willow is one type of willow tree native to the Chicago area.