Dendrometer stem-diameter records from blueberry and hazelnut, Willamette Valley, Oregon (2024–2025)

High-frequency stem-diameter (displacement) records from zero-friction magnetic dendrometers, for the 18 sensors analysed in "Dendrometers scale plant water status from stem to treatment across two complementary multi-stemmed species". Twelve sensors in highbush blueberry (Vaccinium corymbosum L.) under full and deficit irrigation (August–October 2024) and six in hazelnut (Corylus avellana L.) (July–August 2025). Each sensor is provided at three processing levels: cleaned full-resolution, cleaned 30-minute means, and detrended z-score-standardized 30-minute series.