[4][5][6] Breaking the precedent set by previous 5 Seconds of Summer albums, “Wildflower” is the only track from Calm to feature bassist Calum Hood (or any member other than Luke Hemmings) on lead vocals.

Talking about the song, Hood said, "We wanted to make the chorus kind of a choose-your-own-adventure, where some words are left out and then accentuated by these big stabs of synth.

The video was made by the band's creative director Andy DeLuca and Sarah Eiseman and features a circle of moving flowers with the song lyrics in the centre.

[5] The band had originally planned a big-budget music video, but the shoot was cancelled last minute due to the stay-at-home order issued in California to mitigate the COVID-19 pandemic.

According to DeLuca, who directed the video, he and assistant director Eiseman then, "quickly learned animation and drew up several blooming flowers, and also created the trippy colored backgrounds using milk and food dye.