Native to mountain forests at moderate and high altitudes in Kanjanaburi province in western Thailand, this very attractive, undescribed species has only recently been discovered. It sports a beautiful crown of most stunning, silvery-white foliage, carried by short, stocky trunks often blackened by fire. In cultivation it should grow best in subtropical/warm temperate areas and should have no problem with an occasional light freeze.
Cycas sp. 'Silver,' commonly known as Thai Silver Sago, is a cultivar of cycad, a type of ancient plant species that dates back to prehistoric times. Cycads are often referred to as "living fossils" due to their long evolutionary history and unique characteristics. Thai Silver Sago is a popular ornamental cycad cultivated for its attractive silver-blue foliage.
Here are some key features of Cycas sp. 'Silver':
1. Appearance: Thai Silver Sago has a distinctive rosette form with a crown of stiff, arching leaves. The foliage is typically silver-blue or gray-green in color, creating an eye-catching display. The leaves are pinnate, meaning they consist of multiple pairs of leaflets arranged along a central stalk.
2. Size: This cycad species can grow to a moderate size, reaching an average height of 3 to 6 feet (1 to 2 meters) with a similar spread. However, it can take several years to reach its full size.
3. Growth Rate: Cycas sp. 'Silver' is known for its relatively slow growth rate compared to other plants. It may take several years to develop a substantial trunk and reach maturity.
4. Environmental Requirements: Thai Silver Sago prefers warm climates and thrives in tropical or subtropical regions. It requires well-draining soil and can tolerate both full sun and partial shade. It is also known for its tolerance to drought conditions once established.
5. Toxicity: It is important to note that cycads, including Thai Silver Sago, contain toxins that can be harmful if ingested. The seeds, in particular, are toxic and should be kept away from children and pets.
6. Landscape Use: Cycas sp. 'Silver' is often used as an ornamental plant in landscapes and gardens. Its striking silver foliage adds an exotic touch to gardens, rockeries, and container plantings. It can also be grown indoors as a houseplant, given sufficient light and space.
When cultivating Cycas sp. 'Silver,' it is crucial to handle it with care due to its toxic properties. Additionally, consulting with local gardening experts or references specific to your region can provide more detailed information on its cultivation and maintenance requirements.