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flowerPerennial
Delphinium
Delphinium elatum
Also known as: larkspur perennial
Stately spikes of blue, purple, pink, and white flowers. Cottage garden classic reaching 4–6 feet. Needs staking and cool summers.
Growing Requirements
SunFull Sun
WaterMedium
Soil Type
Soil Drainage
Soil pH
Plant Spacing18–24″
Row Spacing24–36″
Planting Depth0.13″
Height48–72″
Spread18–24″
✗ Not Container Friendly✓ Raised Bed Friendly
Planting Schedule
Start Indoors
8–10 weeks before last frost
Transplant Outdoors
1–9 weeks after last frost
Germination
14–21 days
Days to Harvest
365–425 days
Zone Suitability
USDA Hardiness Zones
1
2
3
4
5
6
7
8
9
10
11
12
13
Zones 3–7
Can overwinter in appropriate zones
Perennial in zones 3–7
Needs cool summers — struggles in heat. Stake tall varieties. Cut spent flower spikes to base for second flush. Seeds need darkness to germinate.
Companion Plants
No companion data available for this plant yet.