The average size of a  subdivision backyard in Ontario is 3,300 sq feet and many yards for subdivisions built after 1990 are under 2000 sq feet.   The mature canopy for most hardwood trees can approach 1300 square feet  (with trees like Honey Locust easily exceeding 2000 sq feet),  Its easy  to see that one large tree can eventually dominate your back yard as it matures.  The conifers do not take up nearly the space but often do not provide the shade that so many people desire.  If you have over 4000 sq feet in your yard  - you likely have room for one or two of these trees, Here is a list of trees that will grow to be quite large and may dominate your backyard.   Furthermore, large trees may grow over your House, your pool or your shed and become a hazard (not to mention extend over your neighbour's yard) and become expensive to maintain due to regular pruning.  You need  to seriously consider tree size and where you intend to plant   before purchase.

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 Trees with eventually Large Canopies

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Austrian Pine

Beech

Black Cherry

Cucumber Tree

Ginko

Hackberry

Shagbark Hickory

Bitternut Hickory

Honey Locust

Kentucky Coffee Tree

London Plane Tree

Norway Maple

Sugar Maple

Black Maple

Red Oak

White Oak

Sassafras

Sycamore

Sweet Gum

Tulip Tree

White Pine

Willows

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Trees with smaller canopies but still large

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Basswood

Freemans Maple (rubrum x sacharinum)

Bur Oak

Catalpa

Little Leaf Linden

White Birch

Spruces

Hemlock

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