Pearson's product-moment correlations between climate variables and mean site-level annual growth and establishment between 1941 and 1999.

Relationships with a correlation score >0.25 are indicated by bold typeface. Growth and establishment values are the average values across the five plots. GGD 5 °C refers to growing degree days above 5 °C during the summer months and wFDD refers to freezing degree days calculated as the summed difference in the mean daily temperature from 0 °C over the winter months. A negative FDD value indicates temperatures above freezing (0 °C).