- Girth 6-8 cm: 25 litres pot, trunk – 180-200 cm (5.9-6.6 ft), crown – 60-90 cm (2.0-2.9 ft);
- Girth 8-10 cm: 30 litres pot, trunk – 180-200 cm (5.9-6.6 ft), crown – 60-90 cm (2.0-2.9 ft);
- Girth 10-12 cm: 35 litres pot, trunk – 180-200 cm (5.9-6.6 ft), crown – 60-90 cm (2.0-2.9 ft);
- Girth 12-14 cm: 70 litres pot, trunk – 180-200 cm (5.9-6.6 ft), crown – 100-150 cm (3.3-4.9 ft);
- Girth 14-16 cm: 70-90 litres pot, trunk – 180-200 cm (5.9-6.6 ft), crown – 100-150 cm (3.3-4.9 ft);
- Girth 16-18 cm: 110 litres pot, trunk – 200 cm (6.6 ft), crown – 100-150 cm (3.3-4.9 ft);
- Girth 18-20 cm: 110-130 litres pot, trunk – 200 cm (6.6 ft), crown – 180-200 cm (5.9-6.6 ft);
- Girth 20-25 cm: 130-220 litres pot, trunk – 200 cm (6.6 ft), crown – 160-200 cm (5.2-6.6 ft);
Commonly called the Holly Oak tree, Quercus Ilex often live for more than a thousand years. They are large evergreens with very dense crowns of leaves. They have strong polymorphic leaf of 2 – 9cm long; the younger leaves are wider and have toothed, sharp margins. The colour and texture of the Quercus Ilex varies from hairy, tender and pale green when they first appear to a leathery, dark green, covered in soft white hairs on the underside, when adult. Both male and female flowers are borne on catkins and appear in June, the first ones being the most decorative as they are a soft yellow.
Grows in poor soil, but prefers calcareous, and does not like clay. Will withstand a lack of water in hot, dry summers and tolerates any kind of pruning. These are effective wind breaks, are suited to full sun or shade, good on their own or in groups and resists the salty winds of a sea climate very well, without damage to the beautiful foliage. It has a hardiness rating of H4 making it good for the British climate but better take measures to protect it during extreme cold snaps. It is prone to pests but is generally disease free. It can grow to a maximum height between 1.8 m – 2m (5.9 ft – 6.6 ft) and a final spread 60 cm – 1.5 m (2.0 ft – 4.9 ft)
Latin Name: Quercus Ilex
English Name: Holm Oak Tree, Holly Oak
Foliage Type: Evergreen.
Flowering Period: From May to June
Suggested Location: Outdoor.
Suggested Soil Type: Moist but well-drained. Loam, Chalk, Sand
Suggested Exposure to Sunlight: Full Sunlight
Suggested Exposure to Weather: Sheltered or Exposed
Hardiness Rating: Medium (H4)
Lowest Temperature Tolerance: -15°C to -10 °C (5 °F to 23 °F)
Maintenance: Under glass prune to restrict size in spring
Growth Habit: Bushy
Cultivation: An easy to grow evergreen tree that responds well to formative pruning and clipping. Can be used as hedging in coastal areas and is suitable for most sites except the coldest inland areas. Leaf fall can occur in summer
Propagation: Propagate by seed sown in a coldframe or seedbed as soon as ripe or by grafting in mid-autumn or late winter
Suggested planting locations and garden types: Drought Resistant Hedging & Screens Mediterranean Climate Plants Coastal
Pests: Susceptible to aphids and leaf-mining moths
Diseases: Generally disease free
Final Height: 1.8 m – 2 m (5.9 ft – 6.6 ft)
Final Spread: 60 cm – 1.5 m (2.0 ft – 4.9ft)
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