Ash tree characteristics

The ash tree can grow up to 25 to 40 meters tall and live for several centuries. It has compound leaves made of 7 to 13 serrated leaflets, arranged oppositely on branches, and is known for its light, flexible, and strong wood. This tree is common in temperate European forests, where it prefers deep, cool, and nutrient-rich soils, often near water sources or in wetlands.

Appearance and species

The ash tree has a slender shape and grows fairly quickly. Its bark is smooth and pale gray when young, becoming cracked and forming a distinctive pattern as it ages. In spring, small inconspicuous flowers appear before the leaves, followed by winged fruits called samaras. The most common species is the common ash (Fraxinus excelsior), while the flowering ash and narrow-leaved ash prefer milder climates. All require sunlight and cool, well-draining soil.

Uses and precautions

The ash tree is valued for its wood, which is light, veined, and strong. It is used in woodworking for items like tool handles, stairs, parquet, and sports equipment. However, it needs protection outdoors due to its susceptibility to moisture. In traditional herbalism, ash leaves are sometimes used in infusions to support urinary health and ease joint discomfort. The bark has also been used historically, but it is important to consult a healthcare professional before use, especially for those with kidney issues, on diuretic medications, or during pregnancy or breastfeeding.

Planting and care

Ash trees should be planted between November and March, outside of freezing weather, to encourage strong root growth. They need a sunny or partially shaded spot with deep, fertile, and cool soil. Because they grow quickly, they should be planted in open areas away from buildings, pipelines, and electrical lines. When planting, dig a hole twice as wide as the root ball, loosen the soil, water thoroughly, and use mulch to retain moisture.

Maintenance and disease

During the first three years, ash trees should be watered regularly during dry spells, especially in spring and summer. Light pruning in winter is sufficient to remove dead or damaged branches, but severe cuts should be avoided. Monitor for signs of ash dieback, a fungal disease that causes leaf wilting, branch damage, and tree decline. If symptoms appear, seek professional advice for proper management.

Threats and conservation

The common ash is severely threatened in Europe by ash dieback, a disease caused by the fungus Hymenoscyphus fraxineus. This disease affects both young and mature trees, though some individuals show natural resistance. In gardens, ash trees require ample space due to their large size and strong roots, which can interfere with nearby structures. Samaras, the winged seeds, can lead to many spontaneous seedlings. To help preserve remaining healthy trees, remove hazardous branches with professional help and consider planting more disease-resistant varieties or diverse tree species.