This database contains seasonal non-structural carbohydrates data (NSC; including total NSC, starch and soluble sugars) for terrestrial land plants (global scope), and it is based on a compilation of data from the literature. We selected only data that fulfilled the following criteria: (1) study duration was at least four months, (2) the same individuals or populations were measured at least three times spanning the length of the study, (3) plants were mature, (4) measurements were taken on leaves, stems, or belowground organs, (5) tissue was not bark, phloem or cortex, (6) values reported were total NSC, starch/fructans or soluble sugars, and (7) species were land plants (i.e., saltwater and freshwater species were not included)