Mother Earth is a bay filly with a white star bred in Ireland by the County Tipperary-based Grenane House Stud.

[2] The filly was sent into training with Aidan O'Brien at Ballydoyle and raced in the colours of the Coolmore partners Derrick Smith, Susan Magnier and Michael Tabor.

[4] As a female-line descendant of the Irish broodmare Fair Astronomer, she was related to several major winners including Deputy Commander, Malhub, Roger Barows, Donna Blini and Gentildonna.

[6] Nine days later she was sent to England and stepped up to Group 3 class for the Albany Stakes at Royal Ascot when she was ridden by Ryan Moore and finished third behind Dandalla and Setarhe after being repeatedly hampered as she attempted to obtain a clear run.

With Lordan in the saddle she disputed the lead from the start, went clear of her opponents in the final furlong and won by four lengths from the Jessica Harrington-trained Sussex Garden.

"[8] On 19 July at the Curragh Mother Earth was stepped up to Group 2 class for the Airlie Stud Stakes and finished third of the four runners behind Aloha Star and Frenetic.

With Ryan Moore opting to ride the O'Brien stable's more fancied runner Santa Barbara, Mother Earth was partnered by the veteran Frankie Dettori.

"[14] Two weeks after her win in the 1000 Guineas Mother Earth started 1.7/1 favourite for the French equivalent, the Poule d'Essai des Pouliches over 1600 metres at Longchamp Racecourse.