She also plays for the Blues Women in the Super Rugby Aupiki competition and represents Auckland provincially.

[2] Blackwell has played for Auckland since 2009, and made her test debut for the Black Ferns on 26 November 2011 against England at London.

[3][4] Blackwell was a member of the Black Ferns side that lost to Ireland in the pool stage of the 2014 Rugby World Cup.

[12][3] Blackwell played for the Blues against the Chiefs in the first-ever women's Super Rugby match in New Zealand on 1 May 2021.

[18] She featured in the Blues Women's 0–35 thrashing by the Chiefs Manawa in the final round of the Super Rugby Aupiki competition.