Delphiniums symbolize big-heartedness, openness, and the aspiration to heights in poetry. Their towering flower spikes suggest ambition and reaching skyward. The flower's various blues represent different shades of melancholy, calm, or spirituality. In garden poetry, delphiniums provide structure and drama, representing how life benefits from vertical ambitions. The plant's need for staking to support its height adds themes of needing support to achieve potential, interdependence, and the architecture required for lofty goals.

Delphinium’s tall spires create vertical drama in a border, so it often reads as aspiration, ceremony, or a column of colour rising against sky. The name’s echo of “dolphin” and its sometimes helmeted florets can invite playful or martial imagery. In pastoral and elegiac poems, its height can function like a floral exclamation mark, punctuating a scene. It pairs well with larkspur in allusive writing, as the two are related and easily contrasted.