How to plant Incarvillea delavayi (Chinese Trumpet Flower)?

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Hardy Gloxinia and Chinese Trumpet Flower are two frequent names for these rarely-grown, beautiful perennials Incarvillea Delavayi with the (phonetic spelling in-kar-VIL-ee-uh del-uh-VAY-ee). These hardy and almost hardy perennials are native to high elevations in India, Tibet, China, and Turkestan and are prevalent in ancient English gardens. Here we explain when, where and how to plant Incarvillea delavayi in your garden.

Life Span Of Incarvillea delavayi

Sometimes it is preferable to consider them short-lived perennials, but it is definitely worth the extra work to nurture these plants. They are not a gesneriad or related to gloxinias but instead to the Campsis and Bignonia family or trumpet vines. The plant is named after an 18th-century Jesuit missionary.

Record the planting location

Because crowns are readily destroyed, and plants emerge late in the spring, marking where they’re planted is recommended. If you are careful in the spring and don’t disturb them, you’ll be rewarded with a clump of exotic-looking flowers for years that will amaze visitors to your garden.

How to plant Incarvillea delavayi


Incarvillea is a lovely plant with low-growing clumps of glossy, deeply split leaves from which 12–24 inch leafless stems emerge, crowned with clusters of flowers up to 3 inches wide. The first few flowers appear before the rosettes of mid-green leaflets have fully formed on each plant.

The big terminal heads of exotic trumpet-shaped flowers are a vivid magenta to rosy-pink, with yellow throats, and are carried far above a rosette of dark green leaves on robust stems from mid-spring to mid-summer. A white-flowering cultivar called ‘Snowtop’ is also available.

Hardy gloxinias can be used as an accent plant or to add a bright splash of color to the border or rock garden. They work well along the east side of buildings, where they would receive good morning sun but be sheltered during the winter.

The best location to plant

Plant them with other summer bloomers such as Lilies, Veronica, Penstemon, and Campanula. Remove flowers as they fade to extend the blooming season.

How to plant Incarvillea delavayi?

Incarvillea delavayi should be grown in a deep, sandy soil that has been generously treated with compost or leaf mold. While in bloom, they require constant hydration, but proper drainage is necessary during the dormant winter season. Keep slugs away from the new growth.

Crowns should be buried 3-6 inches below soil level and spaced 12 to 15 inches apart in an area full of the part sun that is protected. Plants should be mulched in the fall with dry straw or other mulch to protect the crowns from winter winds.

Seeds can be planted in a cold frame in sandy soil in the spring or fall or flats of soil outside covered with glass sheets. Seeds do not require preparation, but they do need light to germinate. Covering is not recommended. With a soil temperature of 60-65° F, it takes around 14 days to germinate.

Crowns must be covered with mulch or compost throughout the winter, or they can be lifted and kept in a cool, dry spot in colder zones. It is feasible to divide and reset clumps, but the plants will thrive the greatest if they are left alone.

Related questions & Answers

Do ferns prefer sun or shade?

It depends on the species. Some ferns thrive in direct sunlight, while others thrive in the shadow. Although nearly all ferns like damp but well-drained soil, some do well in dry shade. The shuttlecock fern (Matteuccia struthiopteris) and the hard fern (Blechnum spicant) are excellent shade plants.

Is “bird nest fern” a non flowering plant?

Yes. Bird’s nest fern is a non-flowering plant just like any other true ferns. This family does not produce blooms since it reproduces through spores. Sori, or “fruit dots,” contain spores, which appear as black spots on the lower surface of mature leaves called fronds. The flowering fern we talked above is not an actual fern, but earned its name from its leaves which are very similar to real ferns.

Are Gloxinias Hardy?

The hardy gloxinia fern is a perennial in USDA plant hardiness zones 5 through 7, and perhaps zone 10 if protected from harsh afternoon sun.

Should you water ferns everyday?

A large fern may need daily watering, although a little ones in a bathroom with high humidity may need less regular watering. It’s crucial to water the fern before the soil dries up, but not damp dirt. This means that proper drainage is essential for indoor fern health.

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