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Aeonium arboreum 'Zwartkop' (Black Rose)

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Scientific Name

Aeonium arboreum 'Zwartkop'

Common Names

Black Rose, Black Beauty, Black Tree Aeonium, Black Aeonium, Large Purple Aeonium, Purple Crest Aeonium

Synonyms

Aeonium 'Zwartkop', Aeonium arboreum 'Zwartkopf', Aeonium manriqueorum 'Schwarzkopf', Aeonium arboreum var. atropurpureum 'Schwarzkopf', Aeonium arboreum var. atropurpureum f. nigrum 'Schwarzkopf', Aeonium 'Blackhead'

Scientific Classification

Family: Crassulaceae
Subfamily: Sedoideae
Tribe: Sedeae
Subtribe: Sedinae
Genus: Aeonium

Description

Aeonium arboreum 'Zwartkopf' is a striking succulent with clumps, up to 3 feet (90 cm) tall, of gray-brown stems that often branch near their base. The long, bare stems hold large terminal rosettes, up to 8 inches (20 cm) in diameter, of very dark purple, almost black leaves. In summer, yellow, star-shaped flowers appear in long, conical clusters from the center of the rosettes of mature plants, after which the stems bearing the flower die to the ground.

Photo via wikimedia.org

Hardiness

USDA hardiness zones 9b to 11b: from 25 °F (−3.9 °C) to 50 °F (+10 °C).

How to Grow and Care

Water Black Roses deeply until the water drains through the bottom of the container about once a week from spring to fall. Allow the soil to dry until it is slightly moist at the root level between waterings. During the winter, reduce watering to once a month. Black Roses planted in the ground require less watering than container plants, so feel the soil a few inches down near the roots to check for moisture. If it feels completely dry, water deeply.

Fertilize with water-soluble 10-10-10 fertilizer diluted to half-strength once a month from from spring to fall

Spray Black Roses with insectidical soap or neem oil thoroughly at the first sign of aphids or pests. Repeat this weekly until the pests are gone.

Learn more at How to Grow and Care for a Black Rose Aeonium.

Cultural problems can cause massive damage to Black Roses, including leaf loss. Soggy soil and over-watering are perhaps the most common and serious cultural issues for these succulents because too much water will drown the roots and may lead to root rot, particularly during cold weather.

Learn more at Why Are Leaves Falling Off My Black Rose?

Origin

Aeonium arboreum 'Zwartkop' is a popular cultivar of Aeonium arboreum.

Forms and Hybrids

Links

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