Bud Hardiness

2023-2024

Weekly uploaded data can be viewed here.

2022-2023

Archived data can be found here.

2021-2022

Archived data can be found here.

In this chart Concord High/Low refers to the crop load on the vines during the 2021 growing season. LTE 50 is the temperature at which 50% of the buds die. Temperatures are in degrees Fahrenheit.

To access data from across the state for different varieties, visit the Cornell CALS Viticulture and Enology website.

2019-2020

Winter low temperatures that fall below a critical value can damage grapevine buds.  The critical temperature for bud injury varies over the dormant season, and responds to daily changes in temperature.  We can measure this critical temperature through a procedure called differential thermal analysis, which involves controlled freezing of a sample of buds collected from vineyards. With funding from the New York Wine and Grape Foundation and the Kaplan fund, we are monitored bud hardiness in four key varieties: Riesling, Cabernet Franc, Concord, and Cayuga White.  We monitored samples from Geneva weekly from November to March, and every two weeks for samples from Finger Lakes and Lake Erie vineyards between mid-winter and March.

Lake Erie Crop Level and Bud Hardiness Study (11.13.2020 to present)

Lake Erie (Monitoring from 3/9/2020)

Lake Erie (Monitoring from 3/3/2020)

Lake Erie (Monitoring from 2/25/2020)

Lake Erie (Monitoring from 2/20/2020)

Lake Erie (Monitoring from 2/12/2020)

Lake Erie (Monitoring from 2/6/2020)

Lake Erie (Monitoring from 1/28/2020)

Lake Erie (Monitoring from 1/17/2020)

To access data from across the state visit the Cornell CALS Viticulture and Enology website.