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Euphorbia gamkensis

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Scientific Name

Euphorbia gamkensis J.G.Marx

Scientific Classification

Family: Euphorbiaceae
Subfamily: Euphorbioideae
Tribe: Euphorbieae
Subtribe: Euphorbiinae
Genus: Euphorbia

Description

Euphorbia gamkensis is a unique succulent plant with large, more or less cylindrical underground caudex up to 2.4 inches (6 cm) in diameter. Above-ground, a few rows of outwardly pointing thick, succulent stems grow on the often flat green top of the caudex. The outer row of stems are the longest, the oldest. New stems emerge in the center as the plant grows in width. Scattered whitish stalks can be seen on the older stems where small greenish-yellow cyathia had bloomed in the past. The stems are covered in rhomboid tubercles, small rounded sections that bulge on the stems and multiply as new ones emerge from the center at the top. The top parts of the stems are the greenest here, being the youngest.

Hardiness

USDA hardiness zone 10b to 11b: from 35 °F (+1.7 °C) to 50 °F (+10 °C).

How to Grow and Care

Euphorbias are very easy to care for. They require a little pampering to become established, but once they are, they are self-sufficient. In fact, 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 tolerant 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.

Euphorbia can be grown from seed, but they can be difficult to germinate (or even find). It is usually propagated by cuttings. This can be tricky, because of the exuding sap. Rooting hormone is recommended with Euphorbias… – See more at: How to Grow and Care for Euphorbia

Origin

Native to South Africa (very rare and only occurs between Calitzdorp and Oudtshoorn in the Little Karoo).

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