Colorado Blue Columbine

Colorado blue columbine (*Aquilegia caerulea*, also treated as *A. coerulea* in some references) is a bushy, clump-forming perennial and Colorado’s state flower. Its spring display combines blue sepals and white petals above finely divided green leaves. The species is native to the Rocky Mountains and is especially associated with high-elevation habitats. ## Placement and growing conditions Use this columbine in a partly shaded border, cottage garden, native planting, or open woodland edge. Utah State University reports a typical species size of 1–2 feet tall and wide; cultivated size varies with climate and site. Plant in rich, moist soil that drains well. Full sun can work in cooler locations, while light or moderate shade helps in warmer or lower-elevation gardens. Avoid heavy, poorly drained ground and keep the root zone from becoming bone dry during establishment. Flowers generally appear in spring, with regional timing extending into early summer. The [Colorado State University Extension guide](https://planttalk.colostate.edu/topics/annuals-perennials/1031-columbine/) places the usual Colorado bloom from early or mid-May through June. Bees pollinate the flowers, and the spurred blossoms are also useful in hummingbird gardens. Plants are often short-lived; allowing some seed to mature can help maintain a planting, although columbines cross-pollinate freely and seedlings may not match the parent. ## Seasonal care Remove fading flowers if you want to limit volunteer seedlings or keep the border tidy. Foliage can decline after flowering, especially in hot or humid summers; cut back declining stems when needed and let later perennials fill the space. The [Utah State University profile](https://extension.usu.edu/rangeplants/forbs-herbaceous/colorado-columbine) notes that all parts are poisonous if ingested, so do not use this ornamental as food. ## Maintenance Water young plants regularly enough to establish, then adjust to rainfall and soil moisture. Deadhead selectively, leaving a few seedheads if natural reseeding is desired; remove declining foliage after flowering.