Summer Blues Larkspur

Summer Blues is a compact, clump-forming perennial larkspur with clear sky-blue flowers rising above a low mound of foliage. It brings an early-summer accent to sunny borders and containers where the soil drains freely and does not dry out for long periods. ### Flowering and placement This named Delphinium grandiflorum selection is listed with June flowers lasting six to eight weeks and a compact 8–12 inch height by 12–18 inch spread in [Bordine’s 2026 plant guide](https://bordines.com/wp-content/uploads/2026/05/BORDINES-2026-PLANT-GUIDE.pdf). The [Royal Horticultural Society profile](https://www.rhs.org.uk/plants/207803/delphinium-grandiflorum-summer-blues-summer-series/details) also describes a low, clump-forming plant for full sun and moist but well-drained soil, while publishing substantially larger mature dimensions. Garden performance varies with climate and growing conditions, so allow room for the plant to settle and spread. ### Garden care Choose a sheltered sunny position with fertile, freely draining soil. Keep moisture steady during active growth, especially in dry weather, while avoiding waterlogged ground. The blue flower spikes suit the front or middle of a mixed border and can also brighten a patio pot. ## Maintenance Remove spent flower stems to tidy the clump and encourage a fresh appearance. Cut back old growth after flowering as the season ends, and divide established clumps when they become crowded.