True swallowtail

Delphinium ajacis

Delphinium ajacis has the following growth characteristics, propagation methods, cultivation methods, garden uses, and pest and disease control methods.

Growth Characteristics
Delphinium ajacis is an annual plant that thrives primarily in temperate climates, typically growing to a height of 30 cm to 1 m. The flowers are usually blue, purple, or white and bloom during the summer. It prefers well-drained soil and sunny locations.

Propagation Methods
It is primarily propagated by seeds, which are sown in spring or autumn. Seeds can be sown immediately after harvesting or after undergoing a dormancy period through cold storage in a refrigerator. Germination usually takes 2 to 4 weeks.

Cultivation Methods
When cultivating Delphinium ajacis, it is important to select well-drained soil and plant it in a location with sufficient sunlight. Plant them at appropriate intervals (about 30 cm), and it is recommended to provide support stakes when they grow rapidly. Water regularly, but avoid overwatering.

Uses in the GardenDelta larkspur (Ayakis) enhances the beauty of the garden by decorating flower bed borders with its vibrant colors or planting it in harmony with other summer flowers. It is also highly popular for flower arrangements.

Important Pests and Control Methods
Major pests include aphids, snails, and white mold. Aphids can be removed using soapy water or controlled biologically using natural predators. Snails can be removed by hand or controlled using traps. For white mold, ensure good ventilation as a preventive measure, and use a suitable fungicide in the early stages of the disease.

Delta larkspur (Ayakis) is a relatively easy plant to care for, and with the right environment, you can enjoy its beautiful flowers for a long time.

Plant Family	Ranunculaceae
Height	50~100cm
Spread	10~50cm
Colors	Blue, pink, purple
Bloom Period	May~June
Water Needs	commonly
Exposure	Sunny
Freezing Resistance	-10°C

Larkspur
Delphinium grandiflorum

Delphinium tricorne
Delphinium tricorne