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Botanical name: Calotropis gigantea
Stunning crown shaped flowers of lavender and white, atop attractive, large oval foliage; blooms all season; becomes a large shrub with woody stems in frost free areas; attracts Monarch butterflies and pollinators; perfect for borders or containers.
Other names: Giant Milkweed, Swallow Wort
| Hardiness zone | 9b |
|---|---|
| Flower color | lavender |
| Foliage type | deciduous * |
| Plant form | upright spreading |
| Mature height | 10 feet |
| Spread | 6 feet |
| Light requirements | full sun |
| Moisture requirements | average to moist |
| Plant origin | import |
* deciduous = loses leaves in winter
Crown Flower features showy clusters of lightly-scented lavender star-shaped flowers with white overtones at the ends of the branches from early spring to late fall. The flowers are excellent for cutting. It has green foliage with gray undersides throughout the season. The oval leaves do not develop any appreciable fall color. The fruit is not ornamentally significant.
Crown Flower is a multi-stemmed deciduous shrub with an upright spreading habit of growth. Its average texture blends into the landscape, but can be balanced by one or two finer or coarser trees or shrubs for an effective composition.
This is a relatively low maintenance shrub, and is best cleaned up in early spring before it resumes active growth for the season. It is a good choice for attracting bees and butterflies to your yard, but is not particularly attractive to deer who tend to leave it alone in favor of tastier treats. It has no significant negative characteristics.
Crown Flower is recommended for the following landscape applications;
Mass Planting, General Garden Use, Container Planting
Crown Flower will grow to be about 10 feet tall at maturity, with a spread of 6 feet. It has a low canopy with a typical clearance of 1 foot from the ground, and is suitable for planting under power lines. It grows at a fast rate, and under ideal conditions can be expected to live for approximately 10 years.
This shrub should only be grown in full sunlight. It prefers to grow in average to moist conditions, and shouldn't be allowed to dry out. It is not particular as to soil type or pH. It is highly tolerant of urban pollution and will even thrive in inner city environments. Consider applying a thick mulch around the root zone in winter to protect it in exposed locations or colder microclimates. This species is not originally from North America, and parts of it are known to be toxic to humans and animals, so care should be exercised in planting it around children and pets.
Crown Flower makes a fine choice for the outdoor landscape, but it is also well-suited for use in outdoor pots and containers. Its large size and upright habit of growth lend it for use as a solitary accent, or in a composition surrounded by smaller plants around the base and those that spill over the edges. It is even sizeable enough that it can be grown alone in a suitable container. Note that when grown in a container, it may not perform exactly as indicated on the tag - this is to be expected. Also note that when growing plants in outdoor containers and baskets, they may require more frequent waterings than they would in the yard or garden.
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