Tulip tree

We live in the city of Toronto. We have a tulip tree in our back yard. It is planted in partial sun. Every year, the leaves turn yellow with dark brown spots and end up falling off the tree. I…

Young pinus densiflora (tanyosho) with problems

I planted this young pinus densiflora (tanyosho) a few weeks ago. It seemed healthy when I purchased & planted it. Yesterday I noticed there is a white substance building up at the tips of the new growth (looks sort of…

Problems with a Serviceberry Tree

My serviceberry is covered with white fluff on the underside of most of its leaves. It is producing berries at this time. I have sprayed the leaves they’ve using a product by Safers. This problem happens every summer. The tree…

Early/late blight, fungas, mildew on tomato plants

Dear Sir/Madam, I have 12 heirloom tomato plants in my community garden in Toronto. They are planted in full sun, properly spaced (35 inches apart) watered properly in soil that is augmented with mushroom/turkey litter compost. I have been planting…

Plant disease

I have brown spots on my plants – the Rozanne and other geranium and dead nettle. I think it might be leaf spot. The nursery thought it was leaf scorch. What do you think and how might I treat it…

Cherry blossom tree diseased?

Hi there. I have some type of blossoming tree which was beautiful early spring. But once it lost its blossoms it has really suffered. It looks like some kind of fungus or disease. Any advice?…

Maple tree – fungus?

Hi there: our northfacing house has a large maple (I believe it is a silver maple) that almost overnight starting developing rot/black and brownish curling after the tree’s leaves started to mature (about a week or so ago). We have…

Tree disease

Hello, Please help me in identifying the disease on this tree. There are black patches on the leaves. Thank you…

Lilac tree

Hi, I live in Barrie and this lilac tree is in part sun, sandy soil conditions. It was fine for a few years but last year it looked like it was starting to die. Top part of trunk looks dead…

paperbark maple

For the past 3 years I’ve had the same problem: my 13 year old paperbark maple tree looks very healthy every spring when it leafs out. Stating in about mid June, I start to see a few brown spots on…