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Delphinium elatum
Alpine Larkspur
Delphinium elatum
Delphinium elatum, or Tall Larkspur, is a striking perennial garden flower known for its tall spikes of vibrant, colourful flowers. It typically reaches heights of 2-5 feet and comes in a wide range of colours, including blue, purple, pink, and white. It's a popular choice for adding a dramatic vertical element to flowerbeds and borders. Important note: While attractive, some varieties can be toxic if ingested by humans and livestock.
CategoryDetails
Plant TypePerennial plant
Duration to maturity60 days to harvest
Estimated Plant Lifespan3 years lifespan
Toxic to humansToxic to humans
ToxicityToxic to: Cattle, Sheep, Goats
Sun Requirements6+ hours direct sunlight (Full Sun)
Pollination

Method: Insect

Watering Requirements

Method: Top water

Frequency: When the soil feels dry

Notes: Ensure adequate drainage around the plants

Humidity Requirements

Level: Moderate

Care InstructionsDeadhead spent flowers regularly to encourage continued blooming and prevent seed production. Support tall plants with stakes if necessary, to prevent them from leaning over.
Temperature Range

Min: 10°C

Max: 30°C

Alternative NamesBee Larkspur, alpine delphinium, candle larkspur

Cultivars

Aquilegia canadensis
red columbine
Aquilegia canadensis
Both larkspur and columbine prefer similar growing conditions and soil types, making them a good pairing. The varying heights and bloom times also create a pleasing visual effect. Columbine's attractive foliage complements the larkspur's blooms.
Echinacea purpurea
purple coneflower
Echinacea purpurea
Coneflowers bring contrasting textures and blooms that complement the tall, elegant spikes of Larkspur, helping to create a harmonious display.
Verbascum thapsus
great mullein
Verbascum thapsus

Mullein's vigorous growth habit can out-compete larkspur for resources, potentially hindering the larkspur's development and flowering.

Aphids

Aphids are small, sap-sucking insects that can infest larkspur plants. Symptoms include distorted growth, yellowing leaves, and honeydew deposits. The honeydew can also attract ants.

Slugs and Snails

Slugs and snails can damage the foliage and flowers of larkspur plants. Symptoms include holes and chewed edges on leaves and petals. Inspect plants frequently for these pests.

Neem oil

A natural insecticide that can help control aphids and other pests that feed on larkspur.

Diatomaceous earth

A natural pest control method that can help prevent slugs and snails from harming larkspur plants.