Racing on good to firm ground she headed the Aidan O'Brien-trained favourite Silk And Scarlet a furlong out and won "comfortably" by two lengths.
[7] On 8 August the filly was stepped up in class for the Group 2 Debutante Stakes over the same distance at the Curragh but after disputing the lead for most of the way she was overtaken in the closing stages and came home third behind Silk And Scarlet and Luas Line.
Despite her defeat in the Debutante, Chelsea Rose was moved up to Group 1 class for the Moyglare Stud Stakes over the same course and distance on 5 September and started at odds of 9/1 in a twelve-runner field.
After racing just behind the leaders as Drama set the pace, Chelsea Rose went to the front two and a half furlongs from the finish and stayed on well to repel several challengers in the closing stages.
She crossed the finishing line three quarters of a length in front of Pictavia, with Saoire, Umniya, Belle Artiste and Silk And Scarlet close behind.
[8] Pat Shanahan, who had won the Irish Oaks on the Collins-trained Princess Pati in 1984 said "It's fantastic to ride another group one for Con after all the years we've worked together.
[11] In the Pretty Polly Stakes two weeks later she started second favourite but ran poorly and came home ninth of ten runners behind Alexander Goldrun.
On 14 August Chelsea Rose was theoretically dropped to Listed class for the Ballyroan Stakes over one and a half miles at Leopardstown and started third choice in the betting behind Shalapour (third in the Irish Derby) and Vinnie Roe.
Shalapour overtook Vinnie Roe a furlong out, but Chelsea Rose produced a sustained run to take the lead in the closing stages and won by three quarters of a length.
In the Pretty Polly Stakes on 1 July she produced her best effort when she rallied after being headed inside the final furlong but narrowly failed to overhaul the favored Alexander Goldrun.