Red larkspur (Delphinium nudicaule)

Also known as: Orange larkspur

Hummingbirds are the main pollinators of Delphinium nudicaule, drawn to its vivid orange-red flowers. Notably, similar to other plants in the buttercup family, every part of this perennial is poisonous.

In This Article

Care Tips Water Sunlight Temperature Soil Fertilize Prune Propagation Repotting Toxicity

Attributes of Red larkspur

Lifespan

Perennial, Annual

Plant Type

Herb

Plant Height

30 cm to 1.2 m

Spread

30 cm

Leaf Color

Green

Flower Size

2 cm to 5 cm

Flower Color

Pink Red Orange

Images of Red larkspur

Quickly Identify Red larkspur

Identification of Delphinium nudicaule can be made by noting its bright red to orange tubular flowers, its fern-like leaves that are divided into narrow segments, and its tall, slender stems.

Scientific Classification of Red larkspur

Phylum

Vascular plants

Class

Dicotyledons

Order

Ranunculales

Family

Buttercup

Genus

Larkspurs

Species

Red larkspur

Planting and Growing of Red larkspur

Care Difficulty

Hard

Watering Schedule

Every 4 days

Sunlight Requirements

Full sun

Sunshine Duration

4-6 hours

Ideal Temperature

55-75℉

Soil Type

Potting Mix, Peat Mix

Soil pH

6.5-7.5

Fertilizer Type

Balanced

Pruning Season

Spring, Summer

Pruning Area

Branches, Leaves

Pruning Frequency

2 times a year

Repotting Season

Spring

Pot Type

Ceramic, Plastic

How to Water Red larkspur?

For Delphinium nudicaule, the watering amount is best measured by ensuring the soil is consistently moist but not waterlogged. Ideally, provide about 250 ml of water per session, which allows the soil to absorb moisture effectively without oversaturation.

What are the symptoms of an underwatered Red larkspur? ›

What should I do if my Red larkspur is not getting enough water? ›

What are the symptoms of an overwatered Red larkspur? ›

How to save an overwatered Red larkspur? ›

What Are the Sunlight Requirements for Red larkspur?

Sunlight Requirements: Full sun, Partial sun

Duration of light: 4-6 hours sunlight

Delphinium nudicaule benefits from full sun to partial sun, as optimal light exposure ensures full growth potential, improved flower output, and vibrancy in blooms.

What is the optimal light condition? ›

How to achieve ideal light exposure? ›

What happens under ideal lighting? ›

More About Sunlight Requirements Techniques→

What Is the Ideal Temperature Range for Red larkspur?

Ideal Temperature: 55 ~ 75℉

Delphinium nudicaule thrives best in temperatures between 55°F and 75°F. This range ensures optimal photosynthesis and growth, allowing the plant to maintain healthy foliage and produce vibrant flowers.

What Soil is Best for Red larkspur?

Soil type: Loam, Sandy loam

Soil PH: 6.5 ~ 7.5

Delphinium nudicaule thrives in well-draining soil that prevents waterlogging, ensuring roots remain oxygenated and healthy. Adequate drainage reduces root rot risks and enhances nutrient uptake. This plant favors soil rich in organic matter, providing essential nutrients that support vigorous growth and vibrant blooms. Compost or aged manure can enhance soil fertility, benefitting the plant's overall health. A pH level between 6.5 and 7.5 ensures optimal nutrient absorption for Delphinium nudicaule. Maintaining this pH range helps prevent nutrient lock-up, promoting lush leaf and flower development.

How to Fertilize Red larkspur?

Fertilizer type: Balanced

Delphinium nudicaule, commonly known as the red larkspur, requires a balanced fertilizer with an N-P-K ratio of 10-10-10. Apply approximately 1/2 teaspoon per gallon of water for liquid fertilizers. When using slow-release granules, a single application of about 1 tablespoon per plant is adequate for the entire growing season.

How to Prune Red larkspur?

Pruning Time: Spring, Summer

Make sure to use sharp, clean pruning shears to ensure smooth cuts. Dull blades can damage the plant, and dirty tools can introduce diseases. It's crucial to disinfect your tools before you start pruning. Carefully inspect Delphinium nudicaule for any dead or damaged stems. These can invite pests or disease and hinder the plant's growth. Trim back these parts to healthy wood where possible. Remove spent blooms regularly to encourage a second flush of flowers. Deadheading prevents the plant from putting energy into producing seeds and instead directs resources towards new growth and blossoms. More About Pruning Techniques→

How to Propagate Red larkspur plant?

Propagate Time: Early spring,Spring,Late spring

Begin by soaking the seeds of Delphinium nudicaule in water for 24 hours prior to planting. This process helps in softening the seed coat, promoting faster germination.

Select healthy, non-flowering stems from the parent plant. With clean shears, cut 3-4 inch sections just below a node. Ensure each cutting has a pair of leaves.

Carefully dig up the parent plant and separate it into smaller sections, each with its own root system. Replant these divisions into well-prepared soil.

More About Propagating Techniques→

How to Repot Red larkspur plant?

Repotting frequency: Every 2-3 years

Delphinium nudicaule indicates it's time for repotting when its roots start protruding from the drainage holes or the soil becomes compacted. Spring is ideal, providing time for root adjustment before active growth periods.

Select a pot that is one size larger with good drainage. Opting for a light-colored pot helps keep the roots cool, crucial for this species. The right pot prevents waterlogging and ensures robust root development.

Choose a well-draining potting mix that combines peat, perlite, and coarse sand. This composition ensures proper aeration and drainage, preventing root rot and supporting vibrant growth.

Toxicity

Ingestion

WARNING

The judgment on toxicity and danger is for reference only. We DO NOT GUARANTEE any accuracy of such judgment. Therefore, you SHALL NOT rely on such judgment. It is IMPORTANT TO SEEK PROFESSIONAL ADVICE in advance when necessary.