Glucosyltransferase acting on a broad range of substrates, including crocetin, 4-coumaric acid, caffeic acid and ferulic acid. No activity with indol-3-acetic acid, bixin and norbixin, and no formation of O-glucosides. Involved with UGT94E5 in sequential glycosylation of crocetin to crocin (bis(beta-D-gentiobiosyl) crocetin). crocetin + UDP-alpha-D-glucose = beta-D-glucosyl crocetin + UDP beta-D-glucosyl crocetin + UDP-alpha-D-glucose = bis(beta-D-glucosyl) crocetin + UDP beta-D-gentiobiosyl crocetin + UDP-alpha-D-glucose = beta-D-gentiobiosyl beta-D-glucosyl crocetin + UDP Ubiquitous. Crocin is a yellow pigment that accumulates during fruit development. No other crocetin glucosyl esters detected in neither flowers, leaves, nor stems. No correlation between mRNA expression and pigment accumulation (PubMed:22569263). Belongs to the UDP-glycosyltransferase family.