Other Names:  Palma del Sol, Sun Palm, Mexican Cycad

Description:

A faster growing cycad with fine, feather-like leaves that are longer and wider than most; will develop a trunk over a long period; an attractive accent or container plant that prefers moist, well drained, fertile soil; tolerant of light frost and drought

Ornamental Features

Holmgren's Dioon's attractive large spiny narrow pinnately compound leaves remain grayish green in color with showy powder blue variegation and tinges of silver throughout the year on a plant with a round habit of growth. The dark brown stems can be quite attractive.

Landscape Attributes

Holmgren's Dioon is a spreading evergreen plant with a more or less rounded form. Its relatively fine texture sets it apart from other garden plants with less refined foliage.

This is a relatively low maintenance plant, and should never be pruned except to remove any dieback, as it tends not to take pruning well. It has no significant negative characteristics.

Holmgren's Dioon is recommended for the following landscape applications;

• Accent
• Rock/Alpine Gardens
• General Garden Use
• Container Planting

Planting & Growing

Holmgren's Dioon will grow to be about 6 feet tall at maturity, with a spread of 6 feet. It has a low canopy with a typical clearance of 2 feet from the ground. It grows at a fast rate, and under ideal conditions can be expected to live for 50 years or more. As an evegreen perennial, this plant will typically keep its form and foliage year-round.

This plant does best in full sun to partial shade. It is very adaptable to both dry and moist growing conditions, but will not tolerate any standing water. It is considered to be drought-tolerant, and thus makes an ideal choice for a low-water garden or xeriscape application. It is not particular as to soil pH, but grows best in rich soils. It is quite intolerant of urban pollution, therefore inner city or urban streetside plantings are best avoided. This species is not originally from North America. It can be propagated by division.

Holmgren's Dioon is a fine choice for the garden, but it is also a good selection for planting in outdoor pots and containers. Because of its height, it is often used as a 'thriller' in the 'spiller-thriller-filler' container combination; plant it near the center of the pot, surrounded by smaller plants 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 growing plants in outdoor containers and baskets, they may require more frequent waterings than they would in the yard or garden.