Adenium obesum subsp. socotranum (Vierh.) Lavranos
Socotran Desert Rose, Aden Rose of Socotra
Bloom Time: Spring
Adenium obesum subsp. socotranum is by far the largest species, reaching a height of 15 feet (4.6 m) with a cylindrical trunk up to 8 feet (2.4 m) in diameter at the base. Plants rarely leaf out before midsummer and produce stem growth for only a few weeks. Flowers are pink, up to 5 inches (13 cm) in diameter, and appear for a few weeks in spring while the plant is leafless.
USDA hardiness zone 10a to 11b: from 30 °F (−1.1 °C) to 50 °F (+10 °C).
How to Grow and Care
These are not delicate plants to grow well, provided they get enough sunlight and warmth. Like all succulents, they cannot tolerate sitting in water, and if you err, do it on the side of too little water. Use a specialized soil mix designed for cacti and succulents.
Repot as needed, preferably during the warm season. To repot a succulent, make sure the soil is dry before repotting, then gently remove the plant from the pot. Knock away the old soil from the roots, making sure to remove any rotted or dead roots in the process. Treat any cuts with a fungicide and antibacterial solution. Next, place the plant in its new pot and backfill with potting soil, spreading the roots out as you repot. Leave the plant dry for a week or so, then begin to water lightly to reduce the risk of root rot.
This subspecies is endemic to the island of Socotra.
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