Corylus avellana – Hazel (central Europe)
Habit: Broadly upright large shrub with many stems, 4-6 m tall and wide, umbrella-shaped when old, initially moderate growth, later faster.
Flowers: Monoecious, pretty, yellow male flower catkins before leaves shoot (February) March to April; pistillate flowers like buds, inconspicuous.
Fruits: Brown hazelnuts, edible.
Ripe: In September.
Leaves: Large, cordate, initially with velvety hairs, medium-green; strong yellow or orange-yellow in October.
Roots: Flat and intense, far-reaching, sensitive to soil compaction.
Demands: Sun to semi-shade, likes warmth, frost hardy, average wind resistance, tolerant of urban pollution.
Soil: On all slightly acidic to chalky substrates, very adaptable, dry to fresh; sensitive to salt.
Note: Takes very well to radical cuts.
Hardiness: Zone 5a