Written by Nanna Bryndís Hilmarsdóttir and Ragnar Þórhallsson and produced by Of Monsters and Men and Rich Costey, it is a folk power ballad about recovering from pain that progressively builds into a huge-sounding outro.

[1] Influenced by dance music and Joseph Campbell's book The Power of Myth (1988), Hilmarsdóttir went for an melancholic "introverted side" with "Wild Roses".

[2] "Wild Roses" depicts Hilmarsdóttir nervously singing in a similar haunting manner to "I of the Storm" over calm piano and strings, heavy drums, and the occasional bits of synthesizers and auto-tuned voices.

[3][4][5] Also similar to the Beneath the Skin cut "Organs", it is a folk power ballad that builds in tension to a "big finish" with a brass section.

[12] Sean Maunier, a writer for Metro Weekly, praised the vocalists for pushing their boundaries on Fever Dream, citing "Wild Roses" as an example of the presentation of Hilmarsdóttir's versatility.