Her father's family were originally from France and she was encouraged to study European humanism and developed a passion for art and culture.

[1] She completed her primary education at Escuela Julia Lang and then graduated from secondary school at the Colegio Superior de Señoritas.

Studying to be a teacher, she attended normal school, before completing a degree in literature and philosophy from the University of Costa Rica in 1937.

[2] Returning to Costa Rica, Garrón began working as a teacher in secondary education, teaching at the Normal School of Heredia and the Anastasio Alfaro Lyceum and the Colegio Superior de Señoritas, both in San José.

[4] She became the principal of the Anastasio Alfaro Lyceum[2][4] and later joined the faculty of the University of Costa Rica, as president of the Graduate College of Letters and Philosophy.