“…Days with growth were also not homogenously distributed, but occurred mainly during the first part of the growth period (April/May–June), explaining the stronger impact of spring compared to summer droughts on tree growth (Bose et al, 2021 ; Martin‐Benito et al, 2018 ). Although, discontinuity and irregularity of stem growth processes have been discussed since long (Kozlowski & Pallardy, 1996 ), general assumptions in annual tree growth models (Fatichi et al, 2019 ; Peltier & Ogle, 2020 ) or yield studies (Drew & Downes, 2018 ) often imply linear growth responses to environmental conditions. However, days with growth appeared quite irregularly and could on average only be predicted by environmental conditions in 45% of cases (27% to 68%, Table S4 ), confirming the non‐linearity of growth processes not only on an annual scale (Wilmking et al, 2020 ), but also on shorter time‐scales (Peltier & Ogle, 2020 ).…”