Assessment of biostimulants in combination with cultivar and growth conditions in greenhouse-grown tomatoesPirih, Kris (Avtor) Slatnar, Ana (Avtor) Šircelj, Helena (Avtor) Zamljen, Tilen (Avtor) Grohar, Mariana Cecilia (Avtor) physiologymorphologybiochemistryqualityyieldThis dataset originates from a 2024 greenhouse experiment aiming to assess whether the combined application of two commercial biostimulants—Humistar® (soil‑applied) and Delfan Plus® (foliar‑applied) (Tradecorp, Rovensa, Madrid, Spain)—could surpass their individual effects on the tomato performace and fruit quality traits throughout a heatwave growing season, and whether these responses were cultivar‑dependent. The study involved two indeterminate tomato cultivars, ‘Codino F1’ and ‘Graziano F1’, which primarily differ in their tolerance to high temperatures. The dataset includes continuous fruit growth measurements obtained with DF4 dendrometers, leaf‑level physiological parameters recorded using a CI‑340 photosynthesis system and PAM‑2500 fluorometer, and biochemical profiling of leaves and fruits (photosynthetic pigments, tocopherols, carotenoids, phenolic compounds, sugars, organic acids, and vitamin C, quantified using HPLC‑DAD, fluorescence detection, UHPLC‑PDA‑MS, and dedicated chromatographic systems. Overall, the dataset reflects that cultivar characteristics and growing conditions exert the strongest influence on physiological and metabolic traits, while biostimulant effects (either alone or in combination) remain marginal.20262026-02-20 14:48:49Neznano179703sl