Uebelmannia is a genus of unusual cacti with globose to cylindrical stems with distinct ribs lined with spines. It has three species native to Brazil. The epidermis of Uebelmannias has a granular texture and can be bright green, waxy-gray, or even dark purple. In addition, the spines typically contrast in bright white, golden, or black coloring, with areoles forming a continuous line along the ribs. These characteristics give the plants a striking and unique appearance. Flowers, however, would not be considered anything special among the cactus family as they are small yellow funnels that come out near the stem tip.
The generic name "Uebelmannia" honors Werner J. Uebelmann (1921-2014), a Swiss entrepreneur and writer best known for his large collection of cacti.
In cultivation, Uebelmannia is considered one of the more difficult cacti to grow. Therefore, these cacti are best left to experienced growers and are not a good option for beginners.
Growing Conditions
Uebelmannias need warm temperatures and hours of direct sunlight daily to thrive. During the growing season, Uebelmannias should be kept in very hot conditions, and even in winter, they should never dip below 60°F (15°C).
A low-pH soil is best; it must be well-aerated and drain well. Consider adding sand or grit to a potting mix for best results. Water regularly during the growing season, from spring to fall, then only lightly and occasionally in the winter. Feed regularly during the growing season with a balanced fertilizer like a 20-20-20 mixed into their water and diluted to half-strength.
General Care
Even for cacti, these plants have a low tolerance for cold temperatures, and letting them into even temperate conditions is an easy way to damage them. Make sure to keep them well-watered and give them lots of light.
Their roots need some space and good drainage. Keep an eye out for common pests that can damage them. Uebelmannias are so rare and difficult to grow plants that only those with lots of practice growing cacti will likely have access to them. These will probably only be found in specialty shops, and their cultivation should be left to the experts.
If free-standing in their pots, Uebelmannias can be repotted at the beginning of each growing season by lifting the plant out as a whole and replacing it in a larger container, making sure to spread the roots out in the new soil. Do not pack them in too tightly, as this can damage their root systems and make it hard to retain water.
Propagation
It is quite tricky to propagate Uebelmannias. Though they can grow from seed, in common practice, they are most often grafted onto another plant to help them survive.
Source: thespruce.com
Links
- Back to genus Uebelmannia
- Succupedia: Browse succulents by Scientific Name, Common Name, Genus, Family, USDA Hardiness Zone, Origin, or cacti by Genus