Duncecap larkspur (Delphinium robustum)
Care, watering, light and tips for Duncecap larkspur on Floravia.
Quick facts
- Family: Ranunculaceae
- Difficulty: Moderate care
- Watering: every 7 days
- Light: Partial shade
- Temperature: 10–30 °C
- Toxicity: Toxic to pets
About Duncecap larkspur
Delphinium robustum, commonly known as robust larkspur, is a striking perennial plant belonging to the Ranunculaceae family, native to mountainous regions of North America. It is characterized by its tall flower stalks, which can reach up to 2 meters in height, adorned with dense spikes of blue or purple flowers, making it a spectacular choice for the back of borders or naturalistic gardens. Its majestic presence adds verticality and a vibrant splash of color to any landscape.
Native range
Rocky Mountains of Colorado and New Mexico, United States
Care tips
It prefers full sun to light partial shade and well-drained, organically rich, slightly alkaline soil. Keep the soil consistently moist, especially during flowering periods, but avoid waterlogging as it is susceptible to root rot. A common mistake is not providing support for its tall stems, which can cause them to bend or break in wind or from the weight of the flowers; use stakes to prevent this. Be aware that all parts of the plant are toxic if ingested.
How to save a dying Duncecap larkspur
- Warning signs
- Yellow or wilting leaves, soft stems, no flowering or drooping flowers.
- First aid
- Check drainage and soil moisture. Ensure indirect sunlight.
- What kills it
- Overwatering causing root rot or insufficient light. Does not tolerate prolonged drought.
- Can it be saved?
- Yes, if you act quickly. Good drainage and proper watering are key to recovery.