Tag Archives: Frost

Lavender Crop Update – June 6, 2025

Posted on June 6, 2025 by Sean Westerveld

The earliest angustifolia cultivars are showing some colour in the flower buds in Simcoe (Norfolk County) (Figure 1). Bloom will likely begin in about 2 weeks here. Bloom will be later than last year and probably closer to normal. Figure … Continue reading →

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Ginseng Crop Update – Frost, Rhizoctonia, and Leaf Folders – May 30, 2025

Posted on May 30, 2025 by Sean Westerveld

Frost In the last crop update, I commented on how much colder the temperatures were at Delhi than the forecast the night before. Since then, there have been several nights with temperatures several degrees Celsius colder at Delhi than at … Continue reading →

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Lavender Crop Update – Spring Reminders – May 15, 2025

Posted on May 15, 2025 by Sean Westerveld

Winter Damage The lavender crop should be fully green now, making any winter damage obvious. Plants without any signs of green growth, even at the base of the stems, are likely dead and will need to be replaced. Those plants … Continue reading →

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Ginseng Crop Update – Dealing with Frost and Leaf Folders – May 15, 2025

Posted on May 15, 2025 by Sean Westerveld

Frost Risk Once again, a cold snap at the end of the long weekend and into next week could bring the risk of frost to frost-prone areas. As of May 15, none of the forecasts show freezing conditions, and dewpoints … Continue reading →

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Ginseng Crop Update – Leaf Folders & Forecasting Frost Events – May 8, 2025

Posted on May 8, 2025 by Sean Westerveld

Time to Spray for Leaf Folders Last year, some growers saw an explosion of leaf folders that caused considerable damage. By the time growers noted the problem, it was too late to control them. This is because leaf folders, unlike … Continue reading →

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Comments on Frost Risk for Ginseng – May 30, 2024

Posted on May 30, 2024 by Sean Westerveld

Environmental Canada has issued a frost advisory for most of the ginseng production area for overnight tonight (May 30-31, 2024). Patchy frost is possible in the area. Here are some reminders on assessing the risk of frost in your area. … Continue reading →

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