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Description
Lupinus Regalis, commonly known as the Royal Lupine, is a herbaceous perennial plant that belongs to the legume family, Fabaceae. It is native to the western region of North America, particularly in the Pacific Northwest. The plant features spikes of vibrant blue, purple, and white flowers that bloom in late spring to early summer. Its foliage is green and palmate, consisting of 6-8 leaflets. The plant can grow up to 3 feet in height and 2 feet in width.
Taxonomic Information
| Domain | Eukarya |
| Kingdom | Plantae |
| Phylum | Tracheophyta |
| Class | Magnoliopsida |
| Order | Fabales |
| Family | Fabaceae |
| Genus | Lupinus |
Appearance
The Royal Lupine has spikes of blue, purple, and white flowers that can grow up to 12 inches long. Each flower has a characteristic pea-like shape and is made up of five petals. The plant’s leaves are palmate and consist of 6-8 leaflets that are green in color. The foliage grows up to 12 inches long and 6 inches wide. The Royal Lupine can reach up to 3 feet in height and 2 feet in width.
Care Guide
Water: The Royal Lupine requires moderate watering. Water the plant deeply once a week or when the top inch of soil is dry.
Fertilization: Fertilize the plant in the early spring with a balanced fertilizer. Repeat the process every four weeks until the end of summer.
Soil: The Royal Lupine prefers well-draining soil that is rich in organic matter. The soil’s pH level should be between 6.0 and 7.5.
Sunlight: The plant thrives in full sun to partial shade. It requires at least 4-6 hours of direct sunlight daily.
Hardiness Zones: The Royal Lupine can grow in USDA hardiness zones 4-8.
Common Pests & Diseases
The Royal Lupine is susceptible to aphids, spider mites, and slugs. These pests can be controlled using insecticidal soap and other organic methods. The plant is also prone to root rot, powdery mildew, and rust. Proper watering and good air circulation can prevent these diseases.
Habitat
The Royal Lupine is native to the western region of North America, particularly in the Pacific Northwest. It grows in meadows, prairies, and open woods. The plant prefers well-drained soil and can tolerate drought conditions.
Question and Answer
Q: Is the Royal Lupine deer-resistant?
A: No, the Royal Lupine is not deer-resistant.
Q: Can the Royal Lupine grow in containers?
A: Yes, the plant can grow in containers as long as they are large enough to accommodate its size.
Q: When is the best time to plant the Royal Lupine?
A: The best time to plant the Royal Lupine is in the fall or early spring.
Q: How often should I fertilize the Royal Lupine?
A: Fertilize the plant in the early spring and repeat the process every four weeks until the end of summer.
Related Plants
- Lupinus Polyphyllus
- Lupinus Arboreus
- Lupinus Laxiflorus
- Lupinus Nanus
References
- “Lupinus Regalis.” Missouri Botanical Garden, www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?taxonid=286930&isprofile=0.
- “Lupinus Regalis.” Royal Horticultural Society, www.rhs.org.uk/plants/3956/lupinus-regalis/details.
- “Lupinus Regalis.” Washington Native Plant Society, www.wnps.org/plants/lupinus-regalis.html.
