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Monday, 18 Dec 2017

How old are your Jarrah and Marri trees?

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Have you often looked at the large trees on your property and wondered how old they are?

Well, now we have a way to estimate their age. Trees can be aged by counting the growth rings within the trunk. This is a very difficult task without cutting the tree down....which sort of defeats the purpose!  However, a Department of Parks and Wildlife research scientist has done all the work for us by counting the growth rings of about 200 trees and correlating the number of rings with the circumference of the tree. It is valid for both jarrah and marri. This means that if you can measure the circumference of the tree then you can estimate its age.

If you are interested in the age of your trees, then you will find an excellent explanation in a pdf file on the Department of Parks and Wildlife's website. Click here for the link to the pdf file.

Roleybushcare has simplified the process even more.

We have marked-up two fibreglass tape measures so they read in 'tree years'. All you need to do is borrow one of the tapes from Roleystone Hardware (thanks to Ben and Sue for their help) then loop the tape around the tree at 1.3 m height and read the age from the tape measure.

What could be simpler!!

Members of Roleybushcare measured the largest tree they found in Stinton Cascade Nature Reserve during a recent field day – it was 285 years old.

Do you have an older one on your block? We are keen to find the oldest tree in Roleystone/Karragullen so please borrow a tape, measure your biggest Jarrah and Marri tree and then either give Roleystone Hardware your results or send the data to This email address is being protected from spambots. You need JavaScript enabled to view it..

We will inform you of the results through the Courier and our website.

Click here to learn how to identify your Marri or Jarrah tree.

© Roleybushcare 2017