Huernia thuretii var. primulina (N.E.Br.) L.C.Leach
Accepted Scientific Name
Huernia thuretii Cels ex Hérincq
Yelow-flower Huernia, Primrose Huernia
Huernia primulina, Huernia primulina var. primulina
This succulent is native to the Eastern Cape province of South Africa. It is not accepted as a variety and is treated as a synonym of Huernia thuretii.
Huernia thuretii var. primulina, also known as Huernia primulina, is a small, much-branched succulent that forms dense clumps of green, erect, 4– to 5-angled stems with very sharp teeth along the edges. The stems are up to 1 inch (2.5 cm) thick, excluding the teeth. The stems are mottled with pink and purple in bright sunlight. The teeth are up to 0.2 inches (0.5 cm) long and with recurving tips. Flowers are pale yellow with red or maroon throat and appear solitary or in clusters of up to 4 from the basal part of the stems in fall.
USDA hardiness zones 10a to 11b: from 30 °F (-1.1 °C) to 50 °F (+10 °C).
Huernias require a potting mix with excellent drainage. A succulent plant mix of 50 percent pumice or perlite, 25 percent peat or organic mulch, and 25 percent sand helps prevent rotting and overwatering. Roots experience dieback in cool-season dormancy, so plants grow best in shallow containers that allow the soil to dry out quickly. Using clay pots further helps the soil from staying too wet. An underlayment of coarse gravel below the soil mix also improves drainage. A layer of gravel between the plant and the soil mix in climates with damp, cool summers also prevent the stems from staying too moist.
Outdoor plantings do well in raised beds. Huernias prefer bright light or partial shade. In nature, they grow underneath shrubs or other plants. Too much sun causes stems to develop protective reddish or purple pigmentation and can actually scald the stems. Too little light leads to weak, thin growth with decreased flower production. These plants grow best between 50 and 80 °F (10 and 27 °C). Protect them from freezing weather.
Learn more at How to Grow and Care for Huernia.
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