Grape Bud Hardiness Report

Attached is the SuRDC Grap

Attached are the Supplement Winter Grape Bud Hardiness results for Late January.  The sampled hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on January 24th and 25th in the Okanagan and Similkameen Valley.

Not all the usual varieties/locations were sampled this week so note the following distinction this week between samples not collected (marked “NA”) and no LTE events observed (marked “.”).  If no LTE events are observed it is assumed the buds are already dead at the time of sampling.

Attached are the Winter Grape Bud Hardiness results for Mid January.  The sampled hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on January 16^th and 17^th in the Okanagan Valley.

**Of a total of 540 buds sampled only 3 exotherm peaks were observed.  The values are given for the 2 locations where these were observed but the exotherms are likely from remnant tissues of already damaged buds.

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

Grape Hardiness Reports and Growing Degree Day updates can now be accessed online at:

Attached are the Winter Grape Bud Hardiness results for Early November #2.  The sampled hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on November 7^th and 8^th in the Okanagan Valley.

Grape Hardiness Reports and Growing Degree Day updates can now be accessed online at:

Attached are the Winter Grape Bud Hardiness results for Early November.  The sampled hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on October 31^st and November 1^st in the Okanagan Valley.

Grape Hardiness Reports and Growing Degree Day updates can now be accessed online at:

Attached are the Winter Grape Bud Hardiness results for Early April.  This is the final grape hardiness update for the 2022-2023 winter season.  The sampled hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on April 4^th and 5^th in the Okanagan Valley.

Attached are the Winter Grape Bud Hardiness results for Late March.  The sampled hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on March 28^th and 29^th in the Okanagan Valley.

Grape Hardiness Reports and Growing Degree Day updates can now be accessed online at:

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

Grape Hardiness Reports and Growing Degree Day updates can now be accessed online at:

Attached are the Winter Grape Bud Hardiness results for Early March.  The sampled hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on March 1^st and 2^nd in the Okanagan Valley.

Grape Hardiness Reports and Growing Degree Day updates can now be accessed online at:

Attached are the Winter Grape Bud Hardiness results for Mid February.  The sampled hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on February 14^th and 15^th in the Okanagan Valley.

Attached are the Winter Grape Bud Hardiness results for Late January / Early February.  The sampled hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on January 31^st and February 1^st in the Okanagan Valley.

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

*Note: some of the exotherm events may be from remnant tissues in already damaged buds.

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

Attached are the Winter Grape Bud Hardiness results for early December.  The sampled hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on December 21^st and 22^nd in the Okanagan Valley.

Grape Hardiness Reports and Growing Degree Day updates can now be accessed online at:

Attached are the Winter Grape Bud Hardiness results for early December.  The sampled hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on December 7^th and 8^th in the Okanagan Valley.

Grape Hardiness Reports and Growing Degree Day updates can now be accessed online at:

Attached are the Winter Grape Bud Hardiness results for late November.  The sampled hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on November 23^rd and 24^th in the Okanagan Valley.

Grape Hardiness Reports and Growing Degree Day updates can now be accessed online at:

Attached are the Winter Grape Bud Hardiness results for early November.  The sampled hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on November 8^th and 9^th in the Okanagan Valley.

Grape Hardiness Reports and Growing Degree Day updates can now be accessed online at:

Attached, from Carl Bogdanoff, are 2 files:  the Winter Grape Bud Hardiness results and the Predicted Bud Hardiness chart for Early April.  The sampled hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on April 6^th and 7^th in the Okanagan Valley.  These are the final bud hardiness measurements for this winter.

Attached, from Carl Bogdanoff, are 2 files:  the Winter Grape Bud Hardiness results and the Predicted Bud Hardiness chart for Late March.  The sampled hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on March 30^th and 31^st in the Okanagan Valley.

Attached, from Carl Bogdanoff, are 2 files:  the Winter Grape Bud Hardiness results and the Predicted Bud Hardiness chart for Mid March.  The sampled hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on March 16^th and 17^th in the Okanagan Valley.

Attached, from Carl Bogdanoff, are 2 files:  the Winter Grape Bud Hardiness results and the Predicted Bud Hardiness chart for Early March.  The sampled hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on March 2^nd and 3^rd in the Okanagan Valley.

Attached, from Carl Bogdanoff, are 2 files:  the Winter Grape Bud Hardiness results and the Predicted Bud Hardiness chart for Mid February.  The sampled hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on Feb 16th and 17th in the Okanagan Valley.

Attached, from Carl Bogdanoff, are 2 files:  the Winter Grape Bud Hardiness results and the Predicted Bud Hardiness chart for Early February.  The sampled hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on Feb 2^nd and 3^rd in the Okanagan Valley.

Attached, from Carl Bogdanoff, are 2 files:  the Winter Grape Bud Hardiness results and the Predicted Bud Hardiness chart for Early January.  The sampled hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on Jan 5^th and 6^th in the Okanagan Valley.

Attached, from Carl Bogdanoff, are 2 files:  the Winter Grape Bud Hardiness results and the Predicted Bud Hardiness chart for Late December.  The sampled hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on Dec 21^st and 22^nd in the Okanagan Valley.

Attached, from Carl Bogdanoff, are 2 files:  the Winter Grape Bud Hardiness results and the Predicted Bud Hardiness chart for late November.  The sampled hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on November 24^th and 25^th in the Okanagan Valley.

Attached, from Carl Bogdanoff, 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 8^th and 9^th in the Okanagan Valley.

Our Grape Hardiness Reports and Growing Degree Day updates can now be accessed online at:

Attached, from Carl Bogdanoff, 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 27^th and 28^th in the Okanagan Valley.

Our Grape Hardiness Reports and Growing Degree Day updates can now be accessed online at:

Attached, from Carl Bogdanoff, 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 7^th and 8^th in the Okanagan Valley. 

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 31^st and April 1^st in the Okanagan Valley.

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 17^th and 18^th in the Okanagan Valley.

Attached, from Carl Bogdanoff, is the Winter Grape Bud Hardiness results for Early March.  The hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on March 3^rd and 4^th in the Okanagan Valley.

Attached, from Carl Bogdanoff, is the Winter Grape Bud Hardiness results for Early February.  The hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on February 3^rd and 4^th in the Okanagan Valley.

Attached, from Carl Bogdanoff, 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 20^th and 21^st in the Okanagan Valley.

Attached, from Carl Bogdanoff, 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 6^th and 7^th in the Okanagan Valley.

Attached, from Carl Bogdanoff, 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 22^nd and 23^rd in the Okanagan Valley.

Attached, from Carl Bogdanoff, 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 9^th and 10^th in the Okanagan Valley.

Attached, from Carl Bogdanoff, 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 25^th and 26^th in the Okanagan Valley.

Attached, from Carl Bogdanoff, is the Winter Grape Bud Hardiness results for Mid November.  The hardiness levels were determined as average lethal temperature exotherms (LTE) measured on buds of several varieties by region collected on November 10^th and 12^th in the Okanagan Valley.

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 25^th and 26^th 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 8^th and 9^th as the Summerland Research and Development Centre was closed due to COVID-19.