Kevin Lee, a student of Dr Alex Shigo, has been an arborist in Calgary since the 80s and runs a holistic tree service, krltreeeservice.com .

He is the author of , Your trees, what they want you to know, a lifetime of lessons from a tree whisperer, published this year by Lee Valley tools. A book that focuses on zone 3 tree care.

Kevin advocates a healthy, chemical free tree care practise, where a deeper knowledge of the tree itself, the soil it lives in and regular deep watering usually give you a strong tree that needs little else. These practices free you up from the , business as usual, of many tree services.

Once the pattern of the healthy tree is in your mind and an understanding of what is normal, any abnormality will jump out, because regular through visual inspections are as important as anything else you do