Flavonoid 3',5'-hydroxylase that catalyzes the 3'- and 5'-hydroxylation of flavanones, dihydroflavonols and flavonols (PubMed:31004005). Converts narigenin to dihydrotricetin, dihydrokaempferol to dihydromyricetin and kaempferol to myricetin (PubMed:31004005). a 3',5'-unsubstituted flavanone + 2 O2 + 2 reduced [NADPH--hemoprotein reductase] = a 3',5'-dihydroxyflavanone + 2 H(+) + 2 H2O + 2 oxidized [NADPH--hemoprotein reductase] (2S)-naringenin + 2 O2 + 2 reduced [NADPH--hemoprotein reductase] = (2S)-dihydrotricetin + 2 H(+) + 2 H2O + 2 oxidized [NADPH--hemoprotein reductase] (2R,3R)-dihydrokaempferol + 2 O2 + 2 reduced [NADPH--hemoprotein reductase] = (2R,3R)-dihydromyricetin + 2 H(+) + 2 H2O + 2 oxidized [NADPH--hemoprotein reductase] kaempferol + 2 O2 + 2 reduced [NADPH--hemoprotein reductase] = 2 H(+) + 2 H2O + myricetin + 2 oxidized [NADPH--hemoprotein reductase] Flavonoid metabolism. Expressed in young cromes. Belongs to the cytochrome P450 family.