Apple phenology data set and R script, related to publication "Full flowering phenology of apple tree (Malus domestica) in Pūre orchard, Latvia from 1959 to 2019"

An apple tree (<em>Malus domestica</em>) flowering phenology data set from 1959 to 2019, observed in Pūre orchard, Latvia (Lat: 57.04; Lon: 22.90, WGS84 reference system) is provided (file name “1_Apple_Pure_phenology_tidy.csv”), including: Variety – local apple tree variety name (17 varieties) Type – type of variety one of “summer”, “autumn” or “winter” Year – year of observation Full_bloom – date of reported full bloom onset Full_bloom_yd – day of the year of the reported full bloom onset. The data represent a digitized subset of large field book archive collected since 1930 in Pūre research orchard since early 20^th century, currently integrated into Institute of Horticulture at the Latvia University of Life Sciences and Technologies. The full flowering phase was recorded when 80% all flowers are open examining the state of up to 5 trees for each cultivar. The observations are along a transect every two to three days by an experienced practitioner. The data set is complemented with R-script (“2_Apple_Pure_phenology_R_script.r”) and R workspace image (“3_Apple_Pure_phenology_R_workspace_image.RData”) useful for replicating the analysis presented by Kalvāne et al. (2021; https://doi.org/10.5194/asr-1-1-2021).