Born in Mizil, her parents were Șerban Grigorescu and his wife Maria (née Anastasiu).
At age 21, she met fellow poet George Bacovia, fourteen years her senior, while walking on Bucharest's Calea Victoriei.
Agatha functioned as both secretary and nurse to her sickly husband, supporting him with her teacher's salary.
She contributed to Viața nouă, Revista scriitoarelor și scriitorilor români, Orizonturi noi, Ateneu, Steaua and România Literară, sometimes signing as Agatha Gr.
[1] Her books included poetry: Muguri cenușii (1926), Pe culmi de gând (1934), Lumină (1965), Cu tine noapte (1969), Versuri (1970), Efluvii (1977) and Șoaptele iubirii (1979); poems and prose: Terase albe.