Tag Archives: Frost

Frost Potential for Ginseng May 25 and 26, 2023

Posted on May 23, 2023 by Sean Westerveld

Here we go again on the risk of frost for the ginseng growing areas. The risk appears to be lower at this time but the forecast dewpoint on Weather Underground for Delhi is -1C. Low temperatures are forecast to be … Continue reading →

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Understanding Frost Risks for Lavender – May 16, 2023

Posted on May 16, 2023 by Sean Westerveld

I have had several inquiries about the potential for frost damage to lavender from the frost events in the forecast because of previous events that devastated lavender in some areas. Spring frost damage is relatively rare in lavender. I am … Continue reading →

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Risk of Frost for Ginseng this Week – Plan Now – May 15, 2023

Posted on May 15, 2023 by Sean Westerveld

Although the weather forecasts generally still show low temperatures above freezing every night this week in the ginseng production area (as of Monday at noon), the risk of frost especially Wednesday night is relatively high. This is because of the … Continue reading →

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Ginseng Crop Update – Crop Emergence – April 21, 2023

Posted on April 21, 2023 by Sean Westerveld

The warm temperatures and sunny conditions last week have accelerated ginseng crop emergence. As of April 20, 103 Growing Degree Days (GDD) (Base 5) has accumulated at Delhi. This is 30 GDD above normal for this time of year. On … Continue reading →

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Ginseng Crop Update – Pest Management During Emergence – May 13, 2022

Posted on May 13, 2022 by Sean Westerveld

With the sudden switch to summer-like weather and plenty of sunshine to heat up the soil, ginseng is rapidly emerging this week. More humid weather is expected over the weekend, and this will increase the risk of foliar diseases, especially … Continue reading →

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Dealing with Frost Damage in Lavender – Lessons from 2015

Posted on May 31, 2021 by Sean Westerveld

Just like in May 2015, frost damage to new growth has occurred in some areas of Ontario, mainly north and east of Toronto. The following article is adapted from 2015 with new insights based on what we learned during that … Continue reading →

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