Neem oil for ailing Serviceberry

I planted a large (7 gallon) multi-stemmed serviceberry (amelanchier gran Autumn Brilliance) in June of last year to keep my birds happy!  Unfortunately, my serviceberry has not produced any berries and has been hit by both leaf miners and mildew…

Mexican marigolds as weedkiller

Hello, I am looking to plant something right on or next to my property line to prevent my neighbours’ weeds migrating over and under our fence. The neighbour property is over run with weeds and does not take care of…

Narrow hedge plant for Toronto garden

Hello! Our neighbours are replacing the retaining wall that divides our properties. It currently has an old privet hedge and a (leaning) fence that provide privacy between the yards. Their contractor says the hedge will be lost so we are…

Coreopsis disease

Hi, I had planted native plant Coreopsis lanceolata this spring. It developed some disease so the leaves became kind of gray/white. The new growth did not have that color, but most of the leaves did. It still bloomed well. Is…

Pollinator-attracting flowers for shady balcony

I would like to attract pollinators to my 5th floor balcony container garden, but have had success growing only ferns, coleus and fibrous rooted begonias – not plants with numerous bright flowers. I have seen two or three bees around…

Box Tree Moth: A Toronto Master Gardeners Garden Guide

Toronto is the epicentre of a North American infestation of the box tree moth, Cydalima perspectalis (Walker). The arrival of this invasive pest was officially announced by the Canadian Food Inspection Agency in November 2018. The moth crossed into the…

Oak Tree looking sad

Hello, We noticed the red oak tree outside our new house is looking sad, and we’re not sure why! It’s not a mature oak, but many of the leaves appear to have brown intrusions around the edges. We’d like to…