This record contains dataset and R code associated with the paper "No winter halt in belowground wood growth of four angiosperm deciduous tree species" by Marchand et al. (2025). The current release includes the following files: Marchand_Nature_Eco_Evol.html: Output of the statistical analyses and figures Marchand_Nature_Eco_Evol.Rmd: R script Bud_Leaf_dev.csv: bud and leaf development scores dataset climate.csv: climatic dataset fine_root.csv: fine roots surface dataset senescence_dataset.csv: leaf coloration and fall dataset Temp_TH.csv: relation temperature and thickening dataset xylogenesis.csv: wood cells enlargement and thickening dataset