Delphinium Delphinium 'Sungleam'

Water

For the Larkspur, which is the most common name for Delphinium 'Sungleam', watering should be thorough and deep to encourage root growth, but the soil must be allowed to dry out slightly between waterings. It typically requires about 1 inch of water per week, whether from rainfall or manual watering. During hot or dry spells, you may need to water twice a week. Avoid overhead watering to reduce the risk of fungal diseases, and instead direct water at the base of the plant using a soaker hose or drip irrigation. It's essential not to overwater, as Larkspur does not tolerate soggy soil conditions.

Light

Larkspur thrives in full sun, requiring at least 6 to 8 hours of direct sunlight daily for optimal growth and flowering. However, in very hot climates, they benefit from partial shade during the hottest part of the day. A location that receives morning sunlight and afternoon shade can help prevent overheating and stress on the plants.

Temperature

Larkspur prefers temperate climates with temperatures generally between 50°F and 75°F for ideal growth. It can tolerate a minimum temperature down to about 40°F and can survive up to around 85°F, but prolonged exposure to temperatures outside this range can be detrimental. Ensuring good air circulation can help the plant cope with unexpected temperature changes.

Pruning

Pruning Larkspur is important to remove spent flowers and encourage additional blooming throughout the season. Cut back the flower stalks after the initial flowering to about 6 inches above ground level to promote a second bloom. The best time to prune is late winter or early spring to remove any dead or damaged stems from the previous year and to shape the plant for the upcoming growing season.

Cleaning

As needed

Soil

Delphinium, commonly known as Larkspur, thrives in well-draining soil enriched with organic matter. A mix containing equal parts of loamy soil, compost or well-rotted manure, and sand or perlite is ideal. The soil pH should be slightly alkaline to neutral, ranging from 6.8 to 7.5 for optimal growth.

Repotting

Larkspur typically do not require frequent repotting and can be repotted every 2-3 years or as necessary when they outgrow their current container or the soil becomes depleted. Ensure the new pot allows for continued growth.

Humidity & Misting

Larkspur prefers moderate humidity levels, aiming for a range between 40% to 70%. Avoid environments with high humidity to prevent disease and ensure good air circulation around the plants.

Suitable locations

• Indoor

  Place in a sunny spot, ensure ample airflow and water regularly.

• Outdoor

  Plant in full sun, provide stakes for support and well-drained soil.

• Hardiness zone

  3-7 USDA

Life cycle

Delphinium 'Sungleam', commonly known as the Candle Delphinium, begins its life as a seed, entering a germination stage that requires cold stratification to break dormancy. Upon germination, it develops into a seedling with characteristic lobed leaves. As the plant matures, it enters a vegetative stage, forming a rosette of basal leaves and erect, flowering stalks during the growing season. The Sungleam's reproductive stage is marked by the formation of tall spikes adorned with bright yellow flowers, which are attractive to pollinators and essential for seed production. After pollination and seed set, the plant may go dormant in response to cold temperatures, retreating to the ground level while its roots survive underground. Perennial by nature, the Candle Delphinium re-emerges from dormancy the following spring to repeat its life cycle, with the potential to live and bloom for several years under optimal conditions.

Propogation

• Propogation time

  Spring-Early Summer

• Propogation: The Delphinium 'Sungleam', commonly known as Delphinium, is best propagated in the spring or early summer. The most popular method for propagating these plants is by seed. To propagate Delphinium 'Sungleam' from seeds, start by sowing them thinly in trays or pots filled with a well-drained seed starting mix. Cover them lightly with soil as they need darkness to germinate. Maintain the soil moisture and keep the temperature around 65 to 75 degrees Fahrenheit (18 to 24 degrees Celsius). Germination typically occurs within 2 to 3 weeks. After the seedlings have developed their first set of true leaves and are sturdy enough, they can be transplanted to individual pots or directly into the garden, taking care to protect them from slugs and snails which find them particularly attractive.