People walk along the boardwalk at Woodbine Beach, on Toronto’s lakeshore, on Oct. 25, 2022.
An especially warm fall in Ontario means the province may not get the colourful array of fall foliage that usually transforms treetops this time of year.An especially warm fall in Ontario means the province may not get the colourful array of fall foliage that usually transforms treetops this time of year.
While temperatures have dropped recently, she said it might be too late for the physiological process that triggers trees to change their colours.Daylength, tree species and weather conditions are three key factors that determine the colour of autumn leaves, according to experts. Since weather is the only component that varies from year to year, it has a greater impact on the kind of foliage people can expect, Dudley continued.Experts say three chemicals play a vital role in the production of pigments in a leaf.
"We've had pretty summery temperatures until the last week or so and still nothing close to that, say, one-to-two degrees Celsius overnight temperatures" that is needed, he said.
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