[5] Common grass blues have a weak, fluttering flight and so usually fly near ground level close to a food source.

[6] In captivity, fed on an artificial diet, larvae come in highly variable colours, ranging from white through red to dark purple.

[6] The eggs are laid on leaves, stems, flower buds and young pods of food plants, chiefly legumes of the family Fabaceae such as beans, clover, and various native species [5][6] including Cullen australasicum (Tall Scurf-pea); Hardenbergia violacea (Native Lilac); Kennedia prostrata (Running Postman); and Lotus australis (Austral Trefoil).

[5] The larvae are considered a minor pest and will feed on leguminous plants such as garden beans by eating a small hole into the pods and then devouring the soft seeds within.

[4] The pupa attaches to the lower leaf surface of the food plants with anal hooks and a central girdle.