Data from: Phenological variation associates with the stability of fruit quality traits in cultivated tetraploid blueberry

Data of twelve fruit quality traits and three phenology-related traits collected in 2020, 2021, 2022, and 2023 seasons from 187 genotypes of southern high bush blueberry established in Poplarville, MS, USA (30.8402°N, 89.5342°W) in a sandy loam soil. Fruit quality data include berry weight, berry size, firmness, pH, total polyphenol, citric acid, malic acid, total acids, D-glucose, D-fructose, total Glucose, and total sugar content. The phenology-related traits include flowering and ripening dates, and fruit development period.