Larkspurs 'Cassius' (Delphinium 'Cassius')

Larkspurs 'Cassius'

Larkspurs 'Cassius' is a tall and large-bloomed type of delphinium and consequently will need to be staked to stay upright. The effort is worth it, however; this cultivar is a striking blue with black centers and can grow as tall as 2 m. It prefers full sun but still has some frost hardiness in cooler climates.

Scientific classification

Buttercups, poppies and allies

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Toxic to Pets

Toxicity

Perennial

Lifespan

Herb

Plant Type

1.7 m

Plant Height

0 - 35 ℃

Ideal Temperature

Care Guide for Larkspurs 'Cassius'

Every week

Water

Full sun

Sunlight

0 - 35 ℃

Ideal Temperature

Garden Soil

Soil Type

Water: Larkspurs 'Cassius' needs consistently moist soil for healthy flowering, with thorough watering during dry spells. Ensure soil is damp at least 2.5 cm (1 in) below the surface while preventing waterlogging to avoid root and crown rot.

Fertilize: Being a heavy feeder, larkspurs 'Cassius' needs regular fertilization with 10-10-10 or 16-16-16 fertilizers every 2-3 weeks after root development. Avoid high nitrogen options and apply chemical fertilizers twice in the growing season: once in spring and once in fall.

Pruning: Larkspurs 'Cassius' produces tall spikes of colorful flowers. Prune in early to late spring by cutting old stems to the base and removing damaged foliage. Thinning overcrowded stems enhances air circulation, promoting health and prolific blooming for a visually appealing garden display.

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