For old to ancient trees I would significantly increase the Growth Rate Factor.

Determining the Age of a Live Tree Determining the Age of a Dead Tree Community Q&A How old is the giant tree in your backyard?

This group naturally included my twins Luce and Theo.

dating the age of an oak tree-85dating the age of an oak tree-60dating the age of an oak tree-27

Spengler holds a Master of Arts in creative writing from San Francisco State University and a Juris Doctor from UC Berkeley.

She is currently a candidate for a Master of Fine Arts in fiction.

Remember that the growth factors I provide are more accurate when taken from forest grown trees with competition.

Red Maple Species - 4.5 Growth Factor X diameter Silver Maple Species - 3.0 Growth Factor X diameter Sugar Maple Species - 5.0 Growth Factor X diameter River Birch Species - 3.5 Growth Factor X diameter White Birch Species - 5.0 Growth Factor X diameter Shagbark Hickory Species - 7.5 Growth Factor X diameter Green Ash Species - 4.0 Growth Factor X diameter Black Walnut Species - 4.5 Growth Factor X diameter Black Cherry Species - 5.0 Growth Factor X diameter Red Oak Species - 4.0 Growth Factor X diameter White Oak Species - 5.0 Growth Factor X diameter Pin Oak Species - 3.0 Growth Factor X diameter Basswood Species - 3.0 Growth Factor X diameter American Elm Species - 4.0 Growth Factor X diameter Ironwood Species - 7.0 Growth Factor X diameter Cottonwood Species - 2.0 Growth Factor X diameter Redbud Species - 7.0 Growth Factor Dogwood Species - 7.0 Growth Factor X diameter Aspen Species - 2.0 Growth Factor X diameter Because trees in a landscape or park are often pampered, protected and sometimes older than forest grown trees, it is more of an art to aging these trees without significant error.

If you have a different variety of oak or were unable to identify the oak, obtain a rough age estimate by using four.

Living in France and Northern California, Teo Spengler is an attorney, novelist and writer and has published thousands of articles about travel, gardening, business and law.

Nor was I planning for some random tree hugging but had one particular oak I wanted them to date.

I’ve written before about visiting this ancient tree on private land with Luce and Theo but no one was sure exactly how old it was.

The ISA says that "tree growth rates are affected tremendously by conditions such as water availability, climate, soil conditions, root stress, competition for light, and overall plant vigor.