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Delphinium Sky Blue
Common Name: Delphinium Sky Blue
Delphinium ‘Sky Blue’ is an upright, clump-forming perennial valued for its vertical form and clear sky-blue flower spikes in early to mid-summer, creating a bright, cooling accent in the garden, with finely divided green foliage that may yellow and die back after flowering.
Mature Size:
Width: 18–24 in
Height: 24–36 in
USDA Zones: 3a–7b (best performance in cooler climates; may struggle in heat and humidity)
Light: Full sun to partial shade
Blooms: Sky-blue flower spikes in early to mid-summer
Soil: Rich, well-drained soil
Water: Moderate; prefers consistent moisture
🌸 Landscape Uses
Perennial borders, cottage gardens, cut flowers, mass plantings
🌼 Attracts & Tolerances
Attracts: Pollinators
Tolerances: Deer resistant
| Plant Type: | Perennial |
| Width: | 18-24" |
| Height: | 24-36'' |
| Fragrant: | Yes |
| Fruit: | Not verified |
| Growth Rate | Fast |
| Zone: | 3–7 |
| Deer Resistant: | Yes |
| Salt Tolerant: | Not verified |
| Drought Tolerant: | No |
| Attract: | Butterflies |
| Exposure: | Full Sun |
| Bloom Time: | Early Summer, Mid Summer |
| Landscape/Use: | Container, Mass Planting, Border |
| Shape: | Clump, Upright, Compact |
| Soil Type | Loamy, Well Drained |
| Flower Color: | Blue |
| Leaf Color: | Green |
| Fall Color: | Green |