Is it safe to plant near a house?

No, the roots are vigorous and can damage foundations or drainage systems.

How fast does it grow?

It is a fast growing tree when young, often adding significant height each year.

Plant guide

European Ash.

Fraxinus excelsior

Pronounced FRASH-in-us ek-SEL-see-or

Also known as Ash, Common Ash, European ash

Fraxinus excelsior — Photo by Marek Hrušovský (CC0) via gbif

The European Ash is a stately deciduous tree known for its tall, graceful canopy and compound leaves. It thrives in moist, fertile soils and is a common sight in woodlands across Europe. You will love how its dark buds stand out against the grey bark in winter.

Another photo of European Ash — Photo by Bartosz Czołczyński (CC BY) via iNaturalist

At a glance

Care level: Easy
Plant type: Deciduous tree
Light: Full sun to partial shade
Indoor light: Direct sun
Water: Every 7 to 14 days
Mature size: 30 to 40 meters
Growth rate: Fast
Hardiness: USDA 4 to 8
Bloom time: Early to mid spring

Care

Plant this tree in a spot with plenty of room for its roots to spread. Keep an eye out for signs of ash dieback, which causes wilting leaves and lesions on the branches. Regular monitoring helps you catch any health issues early.

Watering: Young trees need consistent moisture until they are well established in the landscape.
Feeding: Apply a balanced slow release fertilizer in early spring if the soil is poor.
Pruning: Prune only to remove dead or diseased wood during the dormant winter period.
Repotting: This tree is best suited for the ground, but container specimens need larger pots every few years.
Soil: Deep, fertile, moist, well-draining soil
Soil pH: Neutral to alkaline
Temperature: -30 to 35°C
Humidity: 40 to 70%
Drought tolerance: Moderate
Lifespan: Perennial, typically 100 to 200 years.
Deer and rabbits: Moderate

Safety

People: This tree is not considered toxic to humans.
Children: The winged seeds, known as keys, are safe for children to handle but should not be ingested.
Contact allergens: The bark or leaves may cause mild skin irritation in sensitive individuals.
Airborne allergens: The windborne pollen is a significant allergen for many people during the spring.
Edibility: The seeds are sometimes pickled, but they are not a standard food source and should be treated with caution.

How to identify it

Large compound leaves with serrated leaflets
Distinctive black, velvety winter buds
Grey, smooth bark on young trees
Winged seeds known as samaras
Opposite branching pattern on twigs

Height: 20 to 35m
Spread: 10 to 20m
Leaves: green, deciduous
Flowers: purple, green, 0.5 to 1cm
Fruit: brown, Autumn

Problems to watch for

By symptom

Plant problems by symptom

Check your european ash from a photo

Pocket Botanist looks at a photo of your plant and tells you what's wrong and what to try first.

Growing it

Propagation: seed
When to plant: spring, autumn
Overwintering: No special care is needed as it is fully hardy in its native range.
In containers: This tree is far too large for container cultivation.

Seed propagation

Collect mature winged seeds in autumn.
Store in moist sand for a cold stratification period over winter.
Sow in a nursery bed in spring.

Plant in areas where the large canopy will not shade out smaller sun loving perennials.

Grows well with

Hazel · They often grow together in natural woodland understories.
English Oak · These species frequently share the same woodland canopy.

Similar species

Narrow leaved ash · It has a similar growth habit but with narrower leaflets.

Science

Family: Oleaceae
Genus: Fraxinus
Order: Lamiales
Class: Magnoliopsida
Native range: Europe and southwestern Asia.
Conservation: This species is currently under severe threat across its range due to ash dieback disease.

It thrives in moist, fertile soils and is a pioneer species in woodland succession.

Value to wildlife: larval host plant, provides nesting sites
Pollinators: bees, beetles
Uses: timber production, ornamental shade tree, ecological restoration

Through the year

JFMAMJJASOND

Flowering

Fruiting

Foliage

Ecological indicators

Salinity: 2/9
Soil reaction: 7/9
Light: 6/9
Temperature: 5/9
Moisture: 6/9
Nutrients: 7/9

Taxonomy resolved against GBIF.

Questions people ask

Is it safe to plant near a house?: No, the roots are vigorous and can damage foundations or drainage systems.
How fast does it grow?: It is a fast growing tree when young, often adding significant height each year.

Where the name comes from

The name excelsior means higher or loftier in Latin, referring to its impressive stature.

Good to know

Ash wood is highly flexible and shock resistant, making it perfect for tool handles.
In Norse mythology, the world tree Yggdrasil is often identified as an ash.
The leaves of the ash tree are among the last to emerge in spring and the first to fall in autumn.

Keep your european ash growing

This page is a general guide. Save your plant in Pocket Botanist and you get care reminders timed for this plant, plus a care history that shows what worked.

Get the app

This guide was generated with AI on September 26, 2026 and checked against GBIF taxonomy. It is general information, not horticultural or veterinary advice. Read about how we build these guides.