Introduction: Among the non-conventional grounds of homeopathy, the use of medicines in high dilutions is a cause for objections and skepticism among the scientific community, trained within the dose-dependency paradigm of classic pharmacology. Research aiming at evidencing the effects of homeopathic high dilutions has resource to several experimental models (in vitro, in plants and in animals). Aim: To describe the results of studies with high methodological quality that demonstrated positive effects of homeopathic high dilutions on plants. Methods: Taking reviews published until 2015 as reference source, we updated the information through the addition of data in recent studies included in database PubMed. Results: From 167 experimental studies analyzed in the main reviews, 48 met the minimum criteria of methodological quality, from which 29 detected specific effects of homeopathic high dilutions on plants through comparison with adequate controls. Conclusions: Despite the substandard methodological quality of most experiments, studies with systematic use of negative controls and reproducibility demonstrated significant undeniable effects of homeopathic high dilutions on plants.
