Description
Japanese ivy – Hedera rhombea
In a nutshell
Japanese ivy, Hedera rhombea, has thin, delicate matte leaves with soft green or silvery veins.
The leaves are rhombic, that is, diamond-shaped, hence its botanical name. The stems are thin, purple-green in color, like the petioles.
It is a vigorous creeping or climbing ivy.
Technical leaflet - Hedera rhombea
Botanical information – Hedera rhombea
- Family: Araliaceae
- Genus : Hedera
- Species: rhombea
- Synonyms: Hedera formosana, Hedera japonica, Hedera pedunculata
- Pierot classification: ivy type
- Foliage stage: juvenile
- Species origin: Japan, Korea, Taiwan
Description – Hedera rhombea
- Growth habit: spreading, sparse
- Number of lobes: 3, sometimes 5
- Leaf length: 5 to 8 cm
- Leaf width: 4 to 7 cm
- Leaf color: fairly dark green, dull
- Color of veins: silver or light green
- Juvenile leaf shape: rhombic
- Adult leaf shape: oval
- Leaf base: clearly cordate, sometimes hastate
- Petiole length: 3 to 8 cm
- Stem and petiole color: green to pink
- Internodes : 2 to 3 cm
- Hairs: scale-like, 0.1 to 0.3 mm in diameter, blushing in the center, fairly uniform.
Planting, growing and care tips – Hedera rhombea
- Exposure: shade, part shade
- Hardiness: -12°C
- Soil moisture: cool soil
- Soil PH: neutral, calcareous, acidic
- Soil type: all
- Soil richness: ordinary or humus-bearing
- Use: ground cover, climber
- Development: vigorous
- Pruning: once a year
- Pests: rare (red spider mites, scale insects)
- Diseases: rare (leaf spots)

Ivy in literature
“The old wall is covered with ivy, as if the centuries were intertwined within it.”
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