Cold Hardiness: It Takes More Than a Cold Hardy Cultivar


The NWGGA will host two field day workshops focusing on the benefits of spraying dormant vines with Amigo Oil to delay bud break, and additionally, spraying to prevent/minimize damage to tissue post bud break, thus minimize damage from late spring frost and freeze events.

First Field Day:
March 16th, 9 a.m. – 4 p.m.
Mac’s Creek Winery & Vineyards
The cost is $10 to cover lunch

Second Field Day: (Repeat of March 16 Field Day)
March 30th, 9 a.m. – 4 p.m.
James Arthur Vineyards
The cost is $10 to cover lunch.

Each day will have a morning classroom session and a hands-on/demonstration session in the vineyard in the afternoon.

Pre-registration is encouraged but not required.  Pre-register by contacting Jennifer Montgomery (; 703-405-4540) or call Mac’s Creek Vineyards (308) 324-0440.

Cold Hardiness:  It Takes More Than a Cold Hardy Cultivar

Seth McFarland, M.A. & Max McFarland, Ed.D, Co-Owners

 Mac’s Creek Vineyards & Winery

Nebraska winters can be harsh, even brutal and certainly damaging to grapevines.  With ambient temperatures that can plummet to the -10 to -25 (degrees F) range for anywhere from one night to a week; volatile temperatures which result in 60 degree F temperatures in January and February, and late frosts ( even late into May), extensive damage to early budding grapevines can and will occur.  The purpose of this research was to evaluate techniques designed to enhance grapevine cold hardiness, specifically effects of late spraying of dormant vines with vegetable oil designed to delay bud break.  Results across the past five years and across three different microclimate locations were profound.  The application of vegetable oil resulted in significant delay in bud break, ranging from five days to three weeks across different cultivars.  This delay made the difference between grapevines producing on primary buds vs secondary or tertiary buds, or, not producing at all.  Additional benefits included uniformity of ripening and most certainly, quality of fruit.  The impact of these findings on the viticulture industry in Nebraska could potentially be quite significant and enable the industry to take a giant stride toward sustainability.

Information specific to the effective application to our Nebraska vineyards (the past five years of Nebraska research combined with that of Dr. Imed Dami at Colorado State/now Ohio State) will be addressed to include:  Conditions/ variables/applications that we now know make a difference, rates of application; timing of applications, # of applications, methods of application, etc.  These issues will be discussed at length, and, then demonstrated in the vineyards that afternoon.   Additionally, Eric Nelson will present his experience in using products to address what can be done to prevent/minimize tissue damage for post bud break protection.


NWGGA Gold Level Corporate Sponsors