Description
Irish ivy – Hedera hibernica ‘Arco’
In a nutshell
Irish ivy, Hedera hibernica ‘Arco’, has light-green foliage, less thick than the type, which takes on beautiful bronze hues in winter.
Leaves are broad, with slightly wavy or curled edges and whitish veins. Stems are fairly branched, with 3 cm internodes.
It is a semi-adult form that can crawl or climb.
History
This cultivar was discovered by Mario Hollmann of the German Ivy Society in 1999.
Technical leaflet - Hedera hibernica 'Arco'
Botanical information
- Family: Araliaceae
- Genus : Hedera
- Species: hibernica
- Cultivar: ‘Arco’
- Pierot classification: ivy type
- Foliage stage: semi-adult
- Origin: Europe, on the Atlantic coast from Portugal to Scotland
- Origin of cultivar: discovered in 1999 by Mario Hollmann of the German Ivy Society
Description of Hedera hibernica ‘Arco’
- Growth habit: spreading
- Number of lobes: 3 to 5 lobes in general
- Leaf length: 7 cm
- Sheet width: 8 cm
- Leaf color: light to dark green
- Color variation: bronze in winter
- Color of veins: light green
- Stem: fairly branched
- Mattress thickness: fairly dense
- Knot spacing: 3 cm
- Stem and petiole color: purple green
- Petiole length: 7 cm
- Hair: stellate, small
Planting, growing and care instructions for Hedera hibernica ‘Arco’
- Exposure: shade, part shade, sun
- Hardiness: -15°C
- Soil moisture: cool soil
- Soil PH: neutral, calcareous or acidic
- Soil type: all
- Soil richness: ordinary or humus-bearing
- Use: ground cover, climber
- Development: moderate
- Pruning: once a year
- Pests: very rare (red spider mites, scale insects)
- Diseases: very rare (leaf spots)

A page from my little ivy encyclopedia
The question of circumstance ...
What is an internode?
Ivy leaves are arranged alternately on the stem, once on one side, once on the other, and so on. The place where the leaf attaches to the stem is called the node. The space between two consecutive nodes is called theinternode.
The distance between nodes varies greatly from one species and cultivar to another. Node spacing is therefore often a distinctive characteristic of varieties.
Ivy with short internodes is compact, well-filled with leaves. They often form thick mats. In contrast, ivy with long internodes has sparser leaves on much longer stems. These ivies form a less dense cover, which can be an advantage or a disadvantage depending on the intended purpose and use.

Ivy in literature
“The path wound through a tunnel of thick ivy and brambles.”
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