Harlequin Maple

My 20-ish year old Harlequin Maple has about 20% of its leaves 100% white/yellow. They look healthy, the tree looks healthy but It has never had all white/yellow leaves before. Does it need anything??? is this normal????…

Horse Chestnut

IS A CERTIFIED ARBORIST THE SAME AS A CERTIFIED TREE DISEASE DIAGNOSTICIAN? I NEED TO FIND OUT WHAT IS AILING MY TREE AND AM LOOKING FOR A REFERRAL. MANY THANKS!…

Scale on Mugo Pines

Hi. I have 3 large mugo pines planted in a group in the front yard. They’ve had a scale issue for the past few years. Humber Nurseries recommended I spray them with mixture of sulphur and horticultural oil (from a…

Pyramidal oak

We have a pyramidal oak tree about 35′ and probably about 20 – 30 years old in Scarborough, full sun, clay/loam. Over the last 4 years it is developing more and more drooping, some minor limbs and two large groups…

Catalpa Tree

Next door are several large Catalpa trees and every year they have these large pods that drop and sometimes hit people walking by. This year there are no pods. Why are there no pods?…

Blue Spruce Shrub – Insects and Needle Drop

Location – Cambridge, Ontario Partial Shade We moved to our home last year and found that the 2 blue spruce shurbs were losing all of the needles on the tips. (trunks approx. 4″ dia) The nearby overgrown euonymous had scale…

Limbing a Healthy Tree*

We have a 25-year-old crimson king maple tree, about 30 feet tall, in our Toronto back yard. Should all trees be limbed from time to time to keep them healthy? If so, what is the best time of year?…