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Tsuru Holly

Ilex rugosa

Tsuru Holly
Photo: Alpsdake, CC BY-SA 4.0

Ilex rugosa is a low, prostrate evergreen shrub native to cold mountain areas of far-east Russia and northern Japan, valued for its hardiness. It is grown in gardens mainly as a parent of the popular blue hollies, and does best in a cool climate with winter snow cover.

Family
Aquifoliaceae (Aquifoli family)
Grows as
Shrub
Light
Full sun, Part shade
Water
Keep soil evenly moist, especially during the first growing season, and avoid waterlogging.
Soil
Moist, well-drained, slightly acidic soil rich in organic matter.
Temperature
Hardy to around -30 °C; prefers cool summers and protection from hot, dry conditions.
How easy
Easy
Native range
S. Khabarovsk, Sakhalin to N. & C. Japan
Climate
temperate

About

Ilex rugosa, the tsuru holly, is a species of flowering plant in the family Aquifoliaceae, native to southern Khabarovsk Krai, Sakhalin, and the Kuril Islands in Russia, and to eight mountain summits in Japan. It is usually quite prostrate (growing ever lower with increasing altitude) and does well in areas with protective winter snow cover to prevent damage from late frosts.

Because of its cold-hardiness, Kathleen Meserve crossed it with Ilex aquifolium (common holly) and produced hybrids dubbed the "blue hollies" and later given the scientific name Ilex × meserveae. Two of these hybrid shrubs, sold as clones, have gained the Royal Horticultural Society's Award of Garden Merit. 'Conapri' (trade name Blue Princess) is female. 'Conablu' (trade name Blue Prince) is male and grows a bit taller than 'Conapri', perhaps 2 m (7 ft) at maturity.

Other Ilex plants

Ilex abscondita · Ilex acutidenticulata · Ilex affinis · Ilex altiplana · Carolina holly · Sarvis holly · Ilex amygdalina · Ilex andicola · Hawai'i holly · Ilex anonoides · English holly · Ilex aracamuniana

Text excerpted from the Wikipedia article Ilex rugosa by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.

The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.

Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.

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