For optimal growth, Incarvillea delavayi requires moderate light intensity that partially mimics its natural habitat conditions. Providing a filtered light source through sheer curtains is an effective solution. This gently regulates the intensity of direct sunlight plants receive, mimicking dappled light in a woodland understorey.

Position your Incarvillea delavayi where morning sun is prevalent but provide shade from the intense afternoon sun. This can be achieved by planting on the east side of your garden. Ensuring proper exposure prevents the foliage from burning and allows for more colorful blooms.

Chinese trumpet-flower (Incarvillea delavayi)

Also known as: Hardy Gloxinia, Chinese Trumpet Flower

The scientific name of the Chinese trumpet-flower is Incarvillea delavayi. Ideally, it thrives in gardens with plenty of sunlight and well-drained soil. Originating from southwestern China, this plant is characterized by its trumpet-shaped flowers and can attract slugs.

In This Article

Care Tips Water Sunlight Temperature Soil Fertilize Prune Propagation Repotting

Attributes of Chinese trumpet-flower

Lifespan

Perennial, Annual

Plant Type

Herb

Plant Height

30 cm to 61 cm

Spread

30 cm

Leaf Color

Green

Flower Size

3.5 cm

Flower Color

Pink White Red Purple

Images of Chinese trumpet-flower

Quickly Identify Chinese trumpet-flower

Trumpet-shaped bright pink flowers in clusters atop 2 feet (60 cm) tall stalks.

Pinnately compound leaves with deep lobes, spreading bushy appearance, 4-6 inches (10-15 cm) long.

Fern-like leaves forming rosettes up to 12 inches (30 cm) long, intricate lace-like texture.

Leafless erect stem, smooth green with occasional branching near base, up to 2 feet (60 cm).

Flowers clustered, 5-12 blossoms, 2 1/2 inches (6.35 cm) long, pink-red with yellow throats.

Scientific Classification of Chinese trumpet-flower

Phylum

Vascular plants

Class

Dicotyledons

Order

Lamiales

Family

Bignonia

Genus

Incarvillea

Species

Chinese trumpet-flower

Planting and Growing of Chinese trumpet-flower

Care Difficulty

Easy

Watering Schedule

Every 2 days

Sunlight Requirements

Partial sun

Sunshine Duration

6-10 hours

Ideal Temperature

60-75℉

Soil Type

Potting Mix, Peat Mix

Soil pH

6-7.5

Fertilizer Type

Balanced

Pruning Season

Spring, Summer

Pruning Area

Branches, Leaves

Pruning Frequency

Once a year

Repotting Season

Spring

Pot Type

Plastic, Ceramic

How to Water Chinese trumpet-flower?

Incarvillea delavayi requires watering until the soil is thoroughly moist but not waterlogged. You should aim for around 500 ml per watering session, allowing the soil to dry slightly between the waterings. This ensures that the soil remains consistently moist without encouraging mold growth or root rot.

What are the symptoms of an underwatered Chinese trumpet-flower? ›

What should I do if my Chinese trumpet-flower is not getting enough water? ›

What are the symptoms of an overwatered Chinese trumpet-flower? ›

How to save an overwatered Chinese trumpet-flower? ›

What Are the Sunlight Requirements for Chinese trumpet-flower?

Sunlight Requirements: Partial sun

Duration of light: 4 to 6 hours

Partial sun over 4 to 6 hours. Providing this range helps Incarvillea delavayi achieve balanced growth, vibrant foliage, and lush blooming habits, enhancing its overall aesthetic and health.

Light Intensity: ›

Duration of Light Exposure: ›

Positioning: ›

More About Sunlight Requirements Techniques→

What Is the Ideal Temperature Range for Chinese trumpet-flower?

Ideal Temperature: 60 ~ 75℉

The ideal temperature range for cultivating Incarvillea delavayi falls between 60°F and 75°F. This range ensures optimal growth and flowering, as it provides a moderate warmth that supports essential physiological processes.

What Soil is Best for Chinese trumpet-flower?

Soil type: Loam, Sandy loam

Soil PH: 6 ~ 7.5

Incarvillea delavayi thrives in well-drained soil, which helps prevent waterlogging that can lead to root rot. This type of soil ensures that the roots remain healthy and can absorb nutrients efficiently, promoting vigorous growth. Moderately fertile soil provides a balanced supply of essential nutrients to Incarvillea delavayi. This ensures robust flowering and foliage development, keeping the plant vibrant and flourishing. While drainage is crucial, retaining some moisture in the soil helps support continuous growth and blooming. Maintaining the right balance prevents the plant from experiencing drought stress.

How to Fertilize Chinese trumpet-flower?

Fertilizer type: Balanced

Incarvillea delavayi typically requires a balanced approach to fertilization. It's best to use a diluted liquid fertilizer at half strength every two weeks during the growing season. For slow-release granules, apply approximately 150 grams per plant to avoid over-fertilization and maintain steady nutrient availability.

How to Prune Chinese trumpet-flower?

Pruning Time: Spring, Summer

Prune during late spring to early summer when flowering is less intense, allowing the plant to focus energy on new growth rather than recovery from pruning. Avoid cutting during harsh temperature drops to prevent plant stress. Ensure tools are clean and sharp to prevent the spread of disease and minimize plant damage. Regular maintenance of garden tools is essential; this keeps them in good condition and ready for use whenever needed. More About Pruning Techniques→

How to Propagate Chinese trumpet-flower plant?

Propagate Time: Spring,Late spring,Early spring,Late summer,Early summer

After flowering, allow the seed pods to dry on the plant before collecting. This ensures the seeds are mature and ready for planting. Be sure to store seeds in a cool, dry place until ready to sow.

Cut a healthy, non-flowering stem about 10-15 cm long. Remove the lower leaves, keeping at least two leaves at the top. This step helps minimize water loss through transpiration.

When dividing the plant, carefully lift the root ball from the soil, shake off excess soil, and use a sharp knife to cut sections of the plant ensuring each division has roots and shoots. Replant immediately in well-prepared soil.

More About Propagating Techniques→

How to Repot Chinese trumpet-flower plant?

Repotting frequency: Every 1-2 years

The prime time to repot Incarvillea delavayi is when you observe limited growth or root-bound symptoms. If the roots start emerging from the drainage holes or the soil becomes compacted, it's a clear indicator that repotting is needed. Early Spring or Autumn are ideal seasons for this transition, as the plant is not in its peak growing period and can recover more easily from repotting stress.

Select a pot that is about 2-3 inches larger in diameter than the current one. Ensure it has good drainage to prevent waterlogging, which can lead to root rot. A slightly heavier pot also helps provide stability, especially for taller plants that may become top-heavy as they mature. The right pot not only aids in healthy plant development but also complements the aesthetic value of Incarvillea delavayi's beautiful blooms.

Opt for a well-drained loamy soil that retains moisture yet provides adequate drainage to prevent root suffocation. Amending the soil with some organic matter can enhance fertility, offering the necessary nutrients for robust growth. This mixture ensures that water reaches the roots without the risk of waterlogging, promoting healthy and vibrant blooms.