Euphorbia tubiglans Marloth ex R.A.Dyer
Euphorbia tubiglans is a dwarf succulent with a thick fleshy rootstock and a stem that produces a cluster of 2 to 5 upright dark bluish-green branches with a waxy bloom and with 5 to 6 longitudinal ribs. The branches grow up to 3.2 inches (8 cm) long, often longer in cultivation, and up to 0.8 inches (2 cm) in diameter. The ribs of the branches are somewhat obtuse, with tiny tubercles. Flowers are unisexual, male and female cyathia on separate plants. The peduncles are reddish, up to 0.8 inches (2 cm) long, and supported by three small bracts.
USDA hardiness zones 10a to 11b: from 30 °F (−1.1 °C) to 50 °F (+10 °C).
How to Grow and Care
Euphorbias are very easy to care for. These plants require a little pampering to become established, but once they are, they are self-sufficient. More die from too much care and watering than from neglect. Euphorbias need well-draining soil and lots of sunlight. They are not particular about soil pH, but they cannot tolerate wet soil. Unlike most succulents, Euphorbia does not handle long periods of drought well. It may need weekly watering during the summer. Water whenever the soil is dry several inches below the surface. Water deeply, but don't let them sit in wet soil, which can cause root rot. Add some organic matter or fertilizer to the planting hole. If you are growing them in containers or your soil is poor, feed with a half-strength fertilizer monthly.
These succulents can be grown from seed, but they can be difficult to germinate (or even find). They are usually propagated by cuttings. This can be tricky because of the exuding sap. Rooting hormone is recommended with Euphorbias. They tend to grow problem-free, but there are a few pests and diseases to be alert for.
Learn more at How to Grow and Care for Euphorbia.
Native to South Africa (Little Karoo in the Western Cape and Eastern Cape).
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