Delphinium Summer Blues
Summer Blues Larkspur
Delphinium ‘Summer Blues’ is a compact, clump-forming perennial valued for its upright to slightly spreading form and soft blue flower spikes that bloom over an extended period from late spring into summer, creating a relaxed cottage-garden effect, with finely divided green foliage that may yellow and die back after flowering.
Mature Size:
Width: 12–18 in
Height: 12–18 in
USDA Zones: 3a–7b (best performance in cooler climates; more heat tolerant than tall delphiniums)
Light: Full sun to partial shade
Blooms: Soft blue flower spikes from late spring into summer
Soil: Well-drained, moderately fertile soil
Water: Moderate; prefers consistent moisture
🌸 Landscape Uses
Perennial borders, edging, containers, rock gardens, mass plantings
🌼 Attracts & Tolerances
Attracts: Pollinators
Tolerances: Deer resistant, moderate heat tolerance
- Plant type
- Perennial
- Height
- 18-24''
- Width
- 18-24"
- Hardiness zones
- 3–7
- Sunlight
- Full Sun
- Growth rate
- Moderate
- Bloom time
- Early Summer, Summer
- Flower color
- Blue
- Leaf color
- Green
- Fall color
- Green
- Attracts
- Butterflies
- Soil
- Loamy, Well Drained
- Landscape use
- Container, Mass Planting
- Shape
- Clump, Upright
- Fruit
- Yes
- Fragrant
- Yes
- Deer resistant
- Yes
- Drought tolerant
- No
Plant photos (2)
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