She started to write stories in English for children's publications, such as Chicks' Own, Bubbles and Fairyland Tales, before she turned to writing in Welsh. Between 1939 and 1949, she won many prizes in the National Eisteddfod for novels and stories and short plays for children: she contributed often to Tywysydd y Plant, Trysorfa'r Plant, Y Winllan, Cymru'r Plant, Yr Athro, and especially to the comic Hwyl. She wrote many scripts for the B.B.C.'s programmes for children, and short plays for the children of Soar Independent chapel, Nefyn. In addition to Pwt a Moi (1953), Onesimus (1947), and three other books of short plays published in 1947, she published seven novels or historical stories for children — Plant y Mynachdy (1939) — (her own favourite), Luned Bengoch (1946), Y Cwlwm Cêl (1947), Y Dryslwyn (1947), Esyllt (1951), Lois (1955), and ‘Lowri’ in Storïau Ias a Chyffro (1951). Every one of these, with the exception of Y Dryslwyn, is set in Nefyn, and together they ensure for their author a place in the front rank of authors of books in Welsh for children.

She d. on 9 June 1966, and was cremated in the crematorium in Colwyn Bay, where her ashes lie.