White pine disease or pest

Hello, I had 6 white pine trees planted last fall. In my attempts to deal with the Gypsy moth infestation I had run out of insecticide and was hand removing the caterpillars from my trees. When I got to the…

Serviceberry blight

The city planted a lovely specimen Robin Hill Serviceberry late last fall. About 12 feet tall, lovely shape and lots of buds. Location: full sun, well-drained front garden. It bloomed nicely about 2 weeks ago, and now as the leaves…

Sick Cherry Tree

Good morning, I live in Milton and we have some fruit tree, apple and cherry trees that are not flowering. I have taken some pictures to see if you can help us. Thank you

Serviceberry and Juglone

A previous Q&A states that Serviceberries are sensitive to juglone even though they are a native species. There is a lot of conflicting info on the web. My 20 yr. old Serviceberry is about 25 ft from my neighbour’s black…

Beauty Bush (Dreamcatcher) – rust on leaves

My Beautybush seems to have a rust discolouration on the leaves, especially the ones that produced flowers, should I prune them off or cut back the whole bush? I am reluctant to spray with anything.…

Yellow spots on Hollyhock leaves

I work at a vineyard where we have hundreds of Hollyhocks growing.  A lot of them have yellow/orange wart like spots on the leaves aggregating outward.  The leaves eventually turn yellow and drop off the plants.  We sprayed them last…

Rust on roses

This year I did not have many good blooms on my roses and there is rust on them. What can I do about it?  …

Pear trellis rust

Hello, I have two pear trees which unfortunately have pear trellis rust. I have tried spraying with horticultural oil and liquid lime sulphur in the spring, but to no avail – the orange lesions have returned. I have received advice…

Orange spots on pear tree leaves

The leaves on my backyard pear tree get orange spots; the leaves then turn brown, then black and fall off.  What is this?  It’s happening to my neighbour’s tree, too.      …