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2021-2022 Bud Cold Hardiness

December 9, 2021 by abotezatu

This information is provided as a service by Texas A&M AgriLife Extension Service with partial funding from the High Plains Winegrowers Association. Texas A&M AgriLife Extension Service is not responsible for any damage or loss resulting from the use or misuse of this information.

REAL-TIME MONITORING

Critical temperatures for wine grapes are determined using a method called “differential thermal analysis”.  These data are updated approximately weekly from December through March. Data is collected from approximately 60 buds total (node positions 3 to 8) from at least 10 canes per variety on mature vines grown in vineyards in the Texas High Plains AVA.

LT10 = temperature at which 10% of the primary buds will be killed.

LT50 = temperature at which 50% of the primary buds will be killed.

LT90 = temperature at which 90% of the primary buds will be killed.

MAXT = maximum temperature recorded for the day.

MINT = minimum temperature recorded for the day.

If the temperatures recorded for the day decline below the critical temperature (LT), then bud damage has likely occurred. Please review the Grapevine Cold Hardiness factsheet for information on managing cold-damaged vineyards.

Buds are collected from vineyards in Lubbock and Brownfield, Texas.

12/8/2021LTE10 (⁰F)LTE50 (⁰F)LTE90 (⁰F)
Alvarinho6.784.281.74
Cabernet-Sauvignon11.127.743.63
Carignan10.045.452.71
Mourvedre7.835.072.30
Petite Sirah11.797.432.34
Touriga nacional11.397.574.71
Vermentino10.206.802.07
Viognier7.091.89-1.93
12/15/2021
Cinsault12.187.291.96
Marsanne11.612.79-1.14
Piquepoul blanc14.348.923.18
Roussanne10.475.251.42
Sangiovese6.622.73-0.63
Tempranillo12.568.263.22
12/22/2021
Alvarinho3.760.72-2.04
Cabernet-Sauvignon6.603.150.01
Carignan2.840.45-2.02
Mourvedre3.02-0.09-3.03
Petite Sirah10.206.532.62
Touriga nacional8.154.621.53
Vermentino6.302.55-0.56
Viognier5.580.72-2.67
12/29/2021
Cinsault7.541.08-2.85
Marsanne5.16-0.09-2.42
Piquepoul blanc6.513.151.33
Roussanne8.013.22-0.02
Sangiovese6.222.39-0.80
Tempranillo9.125.81-0.58
1/4/2022
Alvarinho-1.43-4.79-7.55
Cabernet-Sauvignon3.20-0.69-5.71
Carignan2.23-2.43-6.39
Mourvedre1.53-2.88-7.35
Petite Sirah5.251.36-1.52
Touriga nacional3.791.08-2.34
Vermentino1.98-2.36-5.30
Viognier-0.49-4.02-7.04
1/12/2022
Cinsault1.36-0.89-4.31
Marsanne1.53-1.68-4.32
Piquepoul blanc2.17-0.87-4.11
Roussanne0.27-3.51-8.25
Sangiovese0.37-3.01-6.68
Tempranillo4.461.85-3.53
1/19/2022
Alvarinho-3.53-6.90-10.88
Cabernet-Sauvignon-1.03-2.60-6.11
Carignan-2.16-5.75-7.76
Mourvedre-3.12-6.09-9.51
Petite Sirah-1.64-4.43-5.89
Touriga nacional-0.11-3.69-6.88
Vermentino-2.54-4.83-7.78
Viognier-4.04-6.66-10.66
1/25/2022
Marsanne-1.16-2.70-5.01
Piquepoul blanc-2.34-3.53-5.39
Tempranillo0.28-2.29-5.37
2/1/2022
Alvarinho-5.67-10.41-13.72
Cabernet-Sauvignon-4.50-5.44-6.14
Carignan-4.47-6.86-8.57
Mourvedre-5.55-7.78-10.91
Petite Sirah-5.17-5.73-6.52
Touriga nacional-3.46-5.15-8.00
Vermentino-3.69-7.13-10.35
Viognier-4.47-7.38-10.14
2/9/2022
Marsanne-5.49-7.26-8.21
Piquepoul blanc-4.56-5.51-6.48
Tempranillo-5.35-6.97-8.61
2/16/2022
Alvarinho-1.84-6.59-12.01
Cabernet-Sauvignon-1.01-4.63-5.89
Carignan-2.52-6.36-8.63
Mourvedre-4.00-7.60-10.82
Petite Sirah-0.85-2.29-5.26
Touriga nacional-3.77-6.84-9.56
Vermentino-0.11-5.03-8.55
Viognier-3.26-5.62-8.88

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