Bud Hardiness

Grape Bud Hardiness Update for Late March

Prepared by: 
Carl Bogdanoff
Date: 
March, 2020

Attached, from Carl Bogdanoff, is the Winter Grape Bud Hardiness results for Late March.  The hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on March 25th and 26th in the Okanagan Valley. 

This is the final Bud Hardiness Report of the 2019-2020 winter season.  Bud hardiness data was not collected on April 8th and 9th as the Summerland Research and Development Centre was closed due to COVID-19.

Location: 
Okanagan Valley
PDF viewer: 
Prepared by:
Carl Bogdanoff
Date:
March, 2020

Attached, from Carl Bogdanoff, is the Winter Grape Bud Hardiness results for Mid March.  The hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on March 11th and 12th in the Okanagan 

Prepared by:
Carl Bogdanoff
Date:
February, 2020

Attached, from Carl Bogdanoff, is the Winter Grape Bud Hardiness results for Late February.  The hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on February 26th and 27th in the Okanagan Valley.

Prepared by:
Carl Bogdanoff
Date:
February, 2020

Attached, from Carl Bogdanoff, is the Winter Grape Bud Hardiness results for Mid February.  The hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on February 12th and 13th in the Okanagan Valley.

Prepared by:
Brad Estergaard
Date:
January, 2020

Attached is the Winter Grape Bud Hardiness results for Late January.  The hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on January 29th and 30th in the Okanagan Valley.

Prepared by:
Stephen Marsh
Date:
January, 2020

Attached is the Winter Grape Bud Hardiness results for Mid January.  The hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on Jan 15th and 17th 2020 in the Okanagan Valley.

Prepared by:
Stephen Marsh
Date:
January, 2020

Attached is the Winter Grape Bud Hardiness results for late December.  The hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on Jan 6th and 7th 2020 in the Okanagan Valley.

Prepared by:
Stephen Marsh
Date:
December, 2019

Attached is the Winter Grape Bud Hardiness results for late December.  The hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on December 19th and 20th in the Okanagan Valley.

Prepared by:
Stephen Marsh
Date:
December, 2019

Attached is the Winter Grape Bud Hardiness results for Early December.  The hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on December 4th and 5th in the Okanagan Valley.

Prepared by:
Stephen Marsh
Date:
November, 2019

Attached is the Winter Grape Bud Hardiness results for Late November.  The hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on November 20th and 21st in the Okanagan Valley.

Prepared by:
Brad Estergaard
Date:
November, 2019

Attached is the Winter Grape Bud Hardiness results for Early November.  The hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on November 6th and 7th in the Okanagan Valley.

Prepared by:
Brad Estergaard
Date:
October, 2019

Attached is the Winter Grape Bud Hardiness results for Late October.  The hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on October 22nd, 23rd and 24th in the Okanagan Valley.

Prepared by:
Brad Estergaard
Date:
April, 2019

Attached is the Winter Grape Bud Hardiness results for Early April.  The hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on April 9th and 10th in the Okanagan Valley.

This is the final grape hardiness update for the 2018-2019 winter season.  It’s time to switch gears toward the growing season so the monthly Growing Degree Day reports will start again in May.

Prepared by:
Brad Estergaard
Date:
March, 2019

Attached is the Winter Grape Bud Hardiness results for Late March.  The hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on March 26th and 27th in the Okanagan Valley.

Prepared by:
Brad Estergaard
Date:
March, 2019

Attached is the Winter Grape Bud Hardiness results for Mid March.  The hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on March 12th and 13th in the Okanagan Valley.

Prepared by:
Brad Estergaard
Date:
February, 2019

Attached is the Winter Grape Bud Hardiness results for Late February.  The hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on February 26th and 27th in the Okanagan Valley.

Prepared by:
Brad Estergaard
Date:
February, 2019

Attached is the Winter Grape Bud Hardiness results for Mid February.  The hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on February 12th and 13th in the Okanagan Valley.

Prepared by:
Brad Estergaard
Date:
January, 2019

Attached is the Winter Grape Bud Hardiness results for Late January.  The hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on January 29th and 30th in the Okanagan Valley.

Prepared by:
Brad Estergaard
Date:
January, 2019

Attached is the Winter Grape Bud Hardiness results for Mid January.  The hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on January 15th and 16th in the Okanagan Valley.

Prepared by:
Brad Estergaard
Date:
January, 2019

Attached is the Winter Grape Bud Hardiness results for Early January.  The hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on January 2nd and 3rd in the Okanagan Valley.

Prepared by:
Brad Estergaard
Date:
December, 2018

Attached is the Winter Grape Bud Hardiness results for Mid December.  The hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on December 18th and 19th in the Okanagan Valley.

Prepared by:
Brad Estergaard
Date:
December, 2018

Attached is the Winter Grape Bud Hardiness results for Early December.  The hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on December 4th and 5th in the Okanagan Valley

Prepared by:
Brad Estergaard
Date:
November, 2018

Attached is the Winter Grape Bud Hardiness results for Late November.  The hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on November 20th and 21st in the Okanagan Valley.

Prepared by:
Brad Estergaard
Date:
November, 2018

Attached is the Winter Grape Bud Hardiness results for Early November.  The hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on November 6th and 7th in the Okanagan Valley.

Prepared by:
Brad Estergaard
Date:
April, 2018

Attached is the Winter Grape Bud Hardiness results for Early April.  The hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on April 10th and 11th in the Okanagan Valley. 

This is the final Grape Bud Hardiness update for the 2017-18 winter season.  Returning in May are the Growing Degree Day (GDD) summaries.

Prepared by:
Brad Estergaard
Date:
March, 2018

Attached is the Winter Grape Bud Hardiness results for late March.  The hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on March 27th and 28th in the Okanagan Valley.

Prepared by:
Brad Estergaard
Date:
March, 2018

Attached is the Winter Grape Bud Hardiness results for mid March.  The hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on March 13th and 14th in the Okanagan Valley.

Prepared by:
Brad Estergaard
Date:
March, 2018

Attached is the Winter Grape Bud Hardiness results for late February.  The hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on February 27th and 28th in the Okanagan Valley.

Prepared by:
Brad Estergaard
Date:
February, 2018

Attached is the Winter Grape Bud Hardiness results for mid February.  The hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on February 13th and 14th in the Okanagan Valley.

Prepared by:
Brad Estergaard
Date:
January, 2018

Attached is the Winter Grape Bud Hardiness results for late January.  The hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on January 30th and 31st in the Okanagan Valley.

Prepared by:
Brad Estergaard
Date:
January, 2018

Attached is the Winter Grape Bud Hardiness results for Mid January.  The hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on January 16th and 18th in the Okanagan Valley.

Note: A power outage on Wednesday January 17th evening interrupted the freezer program causing a loss of the LTE tests.  The majority of Wednesday test sites were re-sampled and tested on Thursday, January 18th

Prepared by:
Brad Estergaard
Date:
December, 2017

Attached is the Winter Grape Bud Hardiness results for Early December.  The hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on December 5th and 6th in the Okanagan Valley.

Prepared by:
Brad Estergaard
Date:
April, 2017

Attached is the Winter Grape Bud Hardiness results for Early April.  The hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on April 4th in the Okanagan Valley.

 

This is the final Bud Hardiness Report of the season.  The return of the Growing Degree Day Reports begins in May.

Prepared by:
Brad Estergaard
Date:
April, 2017

Attached is the Winter Grape Bud Hardiness results for Late March.  The hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on March 28th and 30th in the Okanagan Valley.

Prepared by:
Brad Estergaard
Date:
March, 2017

Attached is the Winter Grape Bud Hardiness results for Mid March.  The hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on March 14th and 16th in the Okanagan Valley.

Prepared by:
Brad Estergaard
Date:
March, 2017

The Winter Grape Bud Hardiness results for Late February / Early March.  The hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on February 28th and March 2nd in the Okanagan Valley.

Prepared by:
Brad Estergaard
Date:
February, 2017

Attached is the Winter Grape Bud Hardiness results for Mid February.  The hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on February 11th and 14th in the Okanagan Valley.

Prepared by:
Brad Estergaard
Date:
January, 2017

Attached is the Winter Grape Bud Hardiness results for Late January.  The hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on January 31st in the Okanagan Valley.

Prepared by:
Pat Bowen
Date:
January, 2017

The hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on Jan 3 in the Okanagan Valley.

Prepared by:
Brad Estergaard
Date:
November, 2016

Attached is the Winter Grape Bud Hardiness results for late November.  The hardiness levels were determined as average lethal temperature exotherms (LTE)measured on buds of several varieties by region collected on November 17th and 23rd in the Okanagan Valley.

Prepared by:
Dr. Pat Bowen
Date:
March, 2016

The Bud Hardiness reports for March. The hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region, collected on March 29-31 in the Okanagan Valley.

Prepared by:
Carl Bogdanoff
Date:
February, 2016

Attached is the bud hardiness update for mid-February.  The hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region, collected on Feb 11-16 in the Okanagan Valley.

Prepared by:
Carl Bogdanoff
Date:
February, 2016

Attached is the bud hardiness update for mid-January.  The hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region, collected on February 2 in the Okanagan Valley.

Prepared by:
Dr. Pat Bowen
Date:
January, 2016

Attached is the bud hardiness update for mid-January.  The hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region, collected on Jan 14 and 19 in the Okanagan Valley.

Prepared by:
d
Date:
January, 2016

Attached is the bud hardiness update for early January.  The hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region, collected on Jan 5 in the Okanagan Valley.

Prepared by:
Dr. Pat Bowen
Date:
December, 2015

Attached is the bud hardiness update for late December.  The hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region, collected on Dec 17 and 22 in the Okanagan Valley.

Cheers and best wishes for 2016!

Prepared by:
Dr. Pat Bowen
Date:
December, 2015

Attached is the bud hardiness report for early December.  The hardiness levels were determined as lethal temperature exotherms (LTE) measured on buds of several varieties by region, collected on Dec 3 and 8 in the Okanagan Valley.

Prepared by:
Dr. Pat Bowen
Date:
November, 2015

Attached is the bud hardiness report for late November.  The hardiness levels were determined as lethal temperature exotherms (LTE) measured on buds of several varieties by region, collected on Nov 19 & 24 in the Okanagan Valley.

Prepared by:
Dr. Pat Bowen
Date:
November, 2015

Attached is the hardiness report for early November.  Bud hardiness levels were determined as lethal temperature exotherms (LTE) measured on buds of several varieties by region, collected on Nov 5 & 10 in the Okanagan Valley.

Prepared by:
Dr. Pat Bowen
Date:
November, 2015

Attached is the first hardiness report for 2015-2016.  The bud hardiness levels were determined as lethal temperature exotherms (LTE) measured on buds of several varieties by region, collected on Oct 27-28 in the Okanagan Valley

Prepared by:
Dr. Pat Bowen
Date:
March, 2015

Attached are bud hardiness levels determined as lethal temperature exotherms (LTE) measured on buds of several varieties by region, collected on Mar 17-19 in the Okanagan Valley.

Prepared by:
Dr. Pat Bowen
Date:
March, 2015

Attached are bud hardiness levels determined as lethal temperature exotherms (LTE) measured on buds of several varieties by region, collected on Mar 3-5 in the Okanagan Valley.

Prepared by:
Dr. Pat Bowen
Date:
February, 2015

Attached are bud hardiness levels determined as lethal temperature exotherms (LTE) measured on buds of several varieties by region, collected on Feb 12-17 in the Okanagan Valley.

Note the loss of hardiness since early Feb.

Prepared by:
Dr. Pat Bowen
Date:
February, 2015

Attached are bud hardiness levels determined as lethal temperature exotherms (LTE) measured on buds of several varieties by region, collected on Feb 3 in the Okanagan Valley.

Prepared by:
Dr. Pat Bowen
Date:
February, 2015

Attached are bud hardiness levels determined as lethal temperature exotherms (LTE) measured on buds of several varieties by region, collected on Jan 15 & 20 in the Okanagan Valley.

Prepared by:
Dr. Pat Bowen
Date:
January, 2015

Attached are bud hardiness levels determined as lethal temperature exotherms (LTE) measured on buds of several varieties by region, collected on Jan 6 in the Okanagan Valley.

Prepared by:
Dr. Pat Bowen
Date:
December, 2014

Attached are bud hardiness levels determined as lethal temperature exotherms (LTE) measured on buds of several varieties by region, collected on Dec 18-23 in the Okanagan Valley.

Prepared by:
Dr. Pat Bowen
Date:
December, 2014

Attached are bud hardiness levels determined as lethal temperature exotherms (LTE) measured on buds of several varieties by region, collected on Dec 4 & 9 in the Okanagan Valley.

Prepared by:
Dr. Pat Bowen
Date:
November, 2014

Attached are bud hardiness levels determined as lethal temperature exotherms (LTE) measured on buds of several varieties by region, collected on Nov 20-25 in the Okanagan Valley.

Prepared by:
Dr. Pat Bowen
Date:
November, 2014

Attached are bud hardiness levels determined as lethal temperature exotherms (LTE) measured on buds of several varieties by region, collected between November 6-12 in the Okanagan Valley.

Prepared by:
Dr. Pat Bowen
Date:
October, 2014

Attached are hardiness levels determined as lethal temperature exotherms (LTE) measured on buds of several varieties by region, collected on Oct 28 in the Okanagan Valley.

Prepared by:
Dr. Pat Bowen
Date:
April, 2014

Attached is the complete set of grape bud hardiness measurements taken during fall to spring 2013-2014 (6990 buds were analyzed), with the final measurements taken on Apr 11.    

GDD updates for 2014 will commence in early May.

Prepared by:
Dr. Pat Bowen
Date:
March, 2014

Attached are hardiness levels determined as lethal temperature exotherms (LTE) measured on buds of several grape varieties by region, collected on Mar 27 in the Okanagan Valley. 

Prepared by:
Dr. Pat Bowen
Date:
March, 2014

Attached are hardiness levels determined as lethal temperature exotherms (LTE) measured on buds of several grape varieties by region, collected on Mar 14 in the Okanagan Valley. 

Prepared by:
Dr. Pat Bowen
Date:
February, 2014

Attached are hardiness levels determined as lethal temperature exotherms (LTE) measured on buds of several varieties by region, collected on Feb 28 in the Okanagan Valley.

Prepared by:
Dr. Pat Bowen
Date:
February, 2014

Attached are hardiness levels determined as lethal temperature exotherms (LTE) measured on buds of several varieties by region, collected on Feb 14 in the Okanagan Valley.

Date:
February, 2014

Attached are hardiness levels determined as lethal temperature exotherms (LTE) measured on buds of several varieties by region, collected on Jan 31 in the Okanagan Valley.

Prepared by Dr. Pat  Bowen, Research Scientist, Viticulture

Pacific Agri-Food Research Centre, Summerland, BC

Prepared by:
Pat Bowen & Carl Bogdanoff
Date:
January, 2013

As part of our research we have been measuring the hardiness of primary buds collected every two weeks from a number of commercial vineyards in the valley.  Attached, for your interest, are the average hardiness levels measured by location and variety since November. Each average hardiness level is from 15 buds (3 vines per site, 5 buds per vine). 

This report is not a guarantee that hardiness levels in any vineyard are the same or similar to those shown in the table.

Prepared by:
Dr. Pat Bowen
Date:
November, 2013

Attached are hardiness levels determined as lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on Nov 8 in the Okanagan Valley.

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