Greeting Mary with Hail Mary’s is like offering her roses

The practice of the Rosary dates back to the 11^th century, when the illiterate religious recited Pater Nosters and Ave Marias in the place of the office in choir. These monks who could not read recited 150 Ave Marias, in lieu of the 150 psalms: this was called the Psalter of Mary. The Dominican Alain de la Roche spread the recitation of the Rosary in the 15^th century. The Catholic rosary, made up of beads grouped in five decades, is the material object used for reciting the Rosary which includes joyful, luminous, sorrowful and glorious sets of mysteries.

… The word “rosary” means a crown of flowers …and comes from courtly love. A "rosarium," meaning "field of roses," denoted a collection of poems that a knight dedicated to his lady. To greet Mary with Ave Marias is like offering her roses by meditating with her on the gospel.

Pope Francis is very devoted to the Rosary. His secretary shared on Vatican Radio on March 10, 2014, that "the Pope does not waste a minute, he works tirelessly. When he feels the need for a short pause, he sits down and recites the Rosary. He prays three of them a day. He says: ‘It helps me relax.’ "

Translated from the French – Source: Rosaire