Larkspur Delphinium 'David Mannion'

☠ Toxic to humans
🐾 Toxic to pets
🌸 Blooming
🍪 Not edible
‍🌱 Hard-care
delphinium 'David Mannion'


Delphinium 'David Mannion' is a striking plant that captivates with its vibrant blooms. The flowers are a showy shade of blue, often a deep, rich hue that catches the eye. These blossoms are arranged on a tall spike, blooming in a series along the stem, creating a dense and elongated floral display. Each individual flower is composed of several petals that fan out from a central point, with the outermost petals being the largest and prominent, giving a somewhat frilled appearance. The central petals, also known as "bees," often feature contrasting colors or markings. The foliage of 'David Mannion' forms a lush backdrop for the radiant blue flowers. The leaves are deeply cut into lobed or divided shapes, giving them an almost fern-like texture. Their color is typically a medium to dark green, which further accentuates the striking color of the flowers. The overall impression of the Delphinium 'David Mannion' is one of regality and dramatic flair, making it a popular choice among gardeners seeking to create a focal point in their garden beds or borders. Despite its lack of mention in size, this plant is known for its vertical impact and the way it punctuates the landscape with its bursts of blue.

Plant Info
Common Problems

About this plant

  • memoNames

    • Synonyms

      No common names available.

    • Common names

      Delphinium 'David Mannion'.

  • skullToxicity

    • To humans

      The plant in question is commonly known as Larkspur. All parts of the Larkspur plant are toxic to humans if ingested. The primary toxic components are the alkaloids such as delphinine, which can cause neuromuscular blocking effects. Symptoms of Larkspur poisoning may include nausea, vomiting, abdominal pain, muscle weakness, and paralysis. In severe cases, respiratory failure, convulsions, and potentially death can occur. Immediate medical attention should be sought if ingestion is suspected.

    • To pets

      Larkspur is also toxic to pets, including dogs and cats. The alkaloids present in the plant, particularly delphinine, can lead to severe symptoms if ingested. These symptoms may include drooling, abdominal pain, vomiting, diarrhea, muscle tremors, stiffness, weakness, convulsions, and cardiac failure. In extreme cases, it can be lethal. If a pet has ingested Larkspur, it is crucial to contact a veterinarian immediately.

  • infoCharacteristics

    • Life cycle


    • Foliage type


    • Color of leaves


    • Flower color


    • Height

      6 feet (1.8 meters)

    • Spread

      2 feet (0.6 meters)

    • Plant type


    • Hardiness zones


    • Native area



  • money-bagGeneral Benefits

    • Aesthetic Appeal: Adds a vibrant touch of blue to gardens with its tall spikes of flowers.
    • Attracts Pollinators: Lures bees, butterflies, and hummingbirds, which help pollinate other plants.
    • Vertical Interest: Its tall structure provides a vertical dimension to landscape designs.
    • Cut Flowers: Suitable for bouquets and vases, providing indoor decoration.
    • Seasonal Interest: Blooms in late spring to early summer, adding seasonal beauty to a garden.
    • Variety of Uses: Can be used in borders, cottage gardens, or as a backdrop to lower-growing plants.
    • Easy to Grow: While it requires some care, it is generally easy to cultivate in the right conditions.

  • medicalMedical Properties

    This plant is not used for medical purposes.

  • windAir-purifying Qualities

    This plant is not specifically known for air purifying qualities.

  • leavesOther Uses

    • Photography Prop: Larkspur, due to its tall and striking flowers, can be used as a dramatic backdrop in floral photography or as a subject in macro photography.
    • Fabric Dye: The blooms of Larkspur can be used to create natural dyes that range in color from blue to purple, depending on the mordant used.
    • Culinary Garnish: While not widely used, Larkspur flowers can be used as a decorative garnish for desserts and salads, provided they have been properly identified and are free from pesticides.
    • Bookmark Crafting: Dried Larkspur flowers can be laminated or pressed to create unique and decorative bookmarks.
    • Floral Confetti: Dried petals of Larkspur can be used as a biodegradable confetti for celebrations like weddings or garden parties.
    • Ice Cubes Decoration: Freeze small Larkspur blooms in ice cubes to create an ornamental touch for summer drinks or punch bowls.
    • Artistic Inspiration: The vibrant colors and form of Larkspur can serve as inspiration for artists and can be used as a subject in paintings or drawings.
    • Greeting Cards: Dried Larkspur flowers can be attached to greeting cards or used in paper-making for a floral touch.
    • Feng Shui: In the traditional practice of Feng Shui, Larkspur can be used in the home to attract positive energy by being placed in an area associated with growth and new beginnings.
    • Moth Repellent: Dried Larkspur flowers have been traditionally used in sachets to repel moths from wardrobes and drawers.

Interesting Facts

  • bedFeng Shui

    The Delphinium is not used in Feng Shui practice.

  • aquariusZodiac Sign Compitability

    The Delphinium is not used in astrology practice.

  • spiralPlant Symbolism

    • Openness to New Experiences: Delphinium, commonly known as larkspur, often symbolizes a willingness to embrace new opportunities and experiences, reflecting a sense of adventure and positivity.
    • Protection and Lightness: As larkspur is also associated with protection, having this flower in the garden or home is thought to fend off negative energies and bring a sense of lightness to one's space.
    • Ardent Attachment: The larkspur is emblematic of strong bonds of love, indicating an ardent attachment towards others, making it a perfect gift to show deep affection.
    • Healing: In some traditions, larkspur signifies health and healing, representing a wish for someone's speedy recovery or the overcoming of personal challenges.

Every 1-2 weeks
2500 - 10000 Lux
Every year
Spring-Early summer
As needed
  • water dropWater

    Larkspur, commonly referred to as Delphinium, requires regular watering to maintain moist soil, especially during the growing season in spring and summer. It should be watered thoroughly once a week, with about 1 to 1.5 gallons of water per plant depending on the size and the weather conditions. Water at the base of the plant to avoid wetting the foliage, which can lead to fungal diseases. During extreme heat, watering frequency may need to increase. In the fall and winter months, reduce watering as the plant goes dormant.

  • sunLight

    Larkspur thrives in locations with full sun exposure receiving at least 6 to 8 hours of direct sunlight per day. They perform best when placed in a spot that gets morning sunlight and some afternoon shade, particularly in regions with hot summers. Avoid heavily shaded areas as this can lead to weak growth and fewer blooms.

  • thermometerTemperature

    Larkspur prefers moderate to cool conditions, thriving in temperatures between 55°F and 75°F. They can tolerate minimum temperatures down to about 40°F but should be protected from hard frosts. During the summer, if temperatures consistently exceed 75°F, the plants may benefit from some shade during the hottest part of the day to prevent stress.

  • scissorsPruning

    Larkspur should be pruned to remove spent flowers and encourage additional blooming, as well as to maintain plant shape and health. Deadhead the flowers once the blooms fade to promote a second flush of flowers. In late fall or early winter, after the first frost, cut back the stems to an inch or two above the ground level to prepare for winter dormancy. Pruning is typically done annually.

  • broomCleaning

    As needed

  • bambooSoil

    Larkspur 'David Mannion' thrives best in a soil mix that is well-draining, rich in organic matter, and has a neutral to slightly alkaline pH level around 6.5 to 7.5. A good mix can be composed of equal parts loam, compost, and sharp sand to facilitate drainage. Regularly enriching the soil with compost or a balanced fertilizer will support its vigorous growth and blooming.

  • plantRepotting

    Larkspur 'David Mannion', typically grown as an annual or biennial, does not usually require repotting because it is often grown from seed each year or replaced after two years. When grown as a perennial, repotting may be done every 2-3 years to refresh the soil and divide the roots if the plant has become crowded.

  • water dropsHumidity & Misting

    Larkspur 'David Mannion' prefers moderate humidity levels but does well in typical outdoor humidity ranges. It does not have specific humidity requirements and is adaptable to most outdoor environments.

  • pinSuitable locations

    • Indoor

      Provide bright sunlight, keep soil moist, and ensure good air circulation.

    • Outdoor

      Plant in full sun, fertile soil, water regularly, and deadhead.

    • Hardiness zone

      3-7 USDA

  • circleLife cycle

    The life of the Larkspur 'David Mannion' begins with seed germination, which occurs in late winter to early spring when conditions are cool and moist. As the seedlings emerge and temperatures rise, they grow into young plants with characteristic feathery foliage. During late spring to early summer, the plant develops tall flowering spikes adorned with deep blue or purple flowers. After pollination, often by bees and butterflies attracted to the vivid flowers, the plant sets seed in late summer. As temperatures cool in the fall, the Larkspur 'David Mannion' enters a period of dormancy, with above-ground growth dying back. The cycle resumes the following spring from the existing root system, or new plants can grow from fallen seeds, completing the life cycle.

  • sproutPropogation

    • Propogation time

      Spring-Early summer

    • The Delphinium 'David Mannion', commonly referred to as larkspur, is often propagated by seed. The optimal time for sowing seeds is in the spring after the threat of frost has passed, encouraging germination in the warming soil. To propagate larkspur by seed, prepare a well-draining soil mix in a container or a seedbed, sprinkle the seeds on the surface, and lightly cover them with soil. Keeping the soil consistently moist but not waterlogged is critical for germination, which may take anywhere from 2 to 3 weeks. After seedlings have developed a couple of true leaves and are sturdy enough to handle, they should be thinned or transplanted to allow adequate space for mature growth. Larkspur prefers a sunny location with rich, well-draining soil to thrive once established.