How to Grow Quamoclit Plants

Guide to Growing Star Ipomoea, Cardinal climbers and Cypress Vine

Quamoclit plants are half hardy perennial vines. They can reach from 3 to 6 metres (10 to 20 feet) in height.

Recently members of the genus have been reclassifed into Ipomoea plant genus. E.g., Quamoclit vulgaris is now called Ipomoea Quamoclit. Other former members include Quamoclit pennata and Quamoclit coccinea.

They bloom in the mornings and evenings from summer to autumn. In bloom, they carry tubular shaped flowers of orange, yellow or red.

Some common names for Quamoclit include Star Ipomoea, Spanish Flag, Cypress vine, Cardinal climber, and Scarlet Star Glory.

Photographs of Ipomoea Quamoclit / Quamoclit vulgaris

Quamoclit vulgaris
Quamoclit vulgaris/Ipomoea Quamoclit (Cypress vine) by Rameshng.

Ipomoea Quamoclit
Ipomoea Quamoclit by Mike Epp.

How to Grow Star Ipomoea and other Quamoclit Plants in teh Garden

If growing Star Ipomoea, Cypress Vine (Ipomoea Quamoclit), or other members of the Quamoclit plant genus outdoors from the off, then the seeds should be sown at a depth of 3 mm (1/8 inch).

Use a seedling spacing of 40 to 90 cm (16 to 36 inches) in the middle of spring. Sow out a couple of weeks after the last chance of frost.

As Star Ipomoea are climbing vines, they should be given a trellis or similar structure to grow upon.

Quamoclit species are able to grow in both sunny or partially shaded conditions. They prefer a location with a light and sandy soil.

If first growing Star Ipomoea or similar species indoors, then chip the seeds and soak for a day in warm water.

The Ipomoea / Quamoclit seeds should then be germinated at 18 to 22 degrees centigrade (64 to 72°F). This should take from one to three weeks. Transplant the seedlings outdoors in mid spring.

Caring for Star Ipomoea (Quamoclit)

It is easy to look after Quamoclit (now Ipomoea Quamoclit) species, such as Star Ipomoea and Cardinal climbers. They require something to grow upon, and should not be over fed.

Common Questions

How many members does the Quamoclit genus contain?

The Quamoclit genus, also known as Cypress vine, contains just two species.

Do Quamoclit members make a good garden or landscaping plant?

Yes, Quamoclit plants are often grown for their attractive, fern-like foliage and trumpet-shaped flowers, making them a favorite for trellises and fences.

Which Quamoclit species are most frequently grown by gardeners?

The most commonly grown species is Quamoclit pennata (Cypress Vine), known for its bright red, star-shaped flowers.

Are Quamoclit plants fragrant?

Quamoclit plants are not typically fragrant, but they are valued for their delicate foliage and vibrant blooms.

What is the perfect location to grow Quamoclit?

Quamoclit prefers a sunny spot with well-drained soil. They are climbing vines and do well with a support structure to grow on.

Is Quamoclit invasive in the USA, if so in which states?

Quamoclit pennata (Cypress Vine) is currently considered invasive in some parts of the southeastern USA due to its rapid growth and reseeding ability.

How do I remove Quamoclit plants from my garden?

Removing Quamoclit involves uprooting the plant and preventing seeding by removing flowers before they produce seeds.


The Quamoclit genus is part of the large Morning glory family. These plants are typically climbing or twining vines, known for their vibrant, trumpet-shaped flowers.

Quamoclit plants are best suited to warm climates and require a sunny location with well-drained soil for optimal growth. They can be planted in the spring after the danger of frost has passed. Providing a trellis or other support is necessary for these climbing plants.

I hope that you enjoyed this guide on how to grow Quamoclit plants. You may also enjoy my gardening guides on how to grow Ixia, Ionopsidium plant, and Iris plants.