The study of the effects of magnetic seed treatment (MST) has garnered significant attention from scientists due to its positive results in seed germination and seedling establishment. Few studies have comprehensively evaluated developmental parameters during the plant's vegetative stage. This study aimed to analyze tomato plants developed from magnetically treated seeds during the vegetative stage in terms of i) physiological responses, ii) growth dynamics, iii) correlation between physiological variables, and iv) the contribution of the technique compared with the performance of a highly commercial cultivar. There were 225 experimental units and three experimental groups with 75 plants each. Treatment one (T