Manna ash
Fraxinus ornus · Oleaceae
📷 Didier Descouens · CC BY-SA 4.0
The gardener's calendar
In autumn, ease off feeding and take the chance to clean up around manna ash and prepare for winter.
ID card
- Foliage
- Deciduous
- Flowering
- May to June, scented white flowers
- Mature size
- 10 to 12 m tall, 6 to 8 m wide
- Growth
- Moderate
- Hardiness
- Very hardy (down to -15°C)
- Origin
- Mediterranean Basin and Middle East
- Soil type
- Well-draining, fertile, neutral to alkaline
✓ Taxonomy verifiedSource: AI estimate · hardiness: reliability high.
Expert tips
The key tip
Flowering ash is undemanding: plant it in full sun and forget about it. No pruning required, just clean up dead or crossing branches in winter.
The common mistake
Planting it in shaded or semi-shaded areas: it flowers poorly and the shape becomes dull.
The pro's trick
Excellent as a standalone specimen or in a row: its fragrant May-June blooms attract pollinating insects.
Care
Watering
Water regularly during the first year after planting to encourage root establishment. Once established, flowering ash tolerates drought well and only needs watering during prolonged dry periods. Avoid waterlogging, particularly in winter.
Exposure
Plant flowering ash in full sun to get generous blooming. It tolerates partial shade but will flower less abundantly. Good sunny exposure also promotes sturdy wood growth.
Soil Preparation
Choose well-draining, fertile soil, preferably neutral to alkaline. Enrich the planting hole with compost or potting soil when planting. Avoid compacted or constantly wet soils that encourage rot.
Pruning and Training
Prune lightly after flowering to maintain a nice shape and remove dead or badly oriented branches. During the first three years, guide formation by removing lower branches to create a clean trunk. Avoid heavy pruning which would slow growth.
Fertilizing
Not demanding, flowering ash generally needs no fertilizer once established. A surface compost application each spring is enough for poor soils. If visible deficiency occurs (yellowing foliage), apply balanced fertilizer in spring.
Health and Pests
Generally very robust, it can be affected by rust or anthracnose in humid conditions. Ensure good air circulation by pruning regularly and avoid watering the foliage. Watch for cankers or necrosis which would require sanitary pruning.
Did you know?
Flowering ash, also called 'orne', was cultivated since Antiquity around the Mediterranean Basin for its beautiful foliage and especially for its white flowers deliciously scented that bloom in clusters. In southern Italy and Sicily, the sweet sap that naturally flows from this tree was collected and transformed into 'manna' — a syrup used as a natural sweetener before the expansion of cane sugar. It's an incomparably charming urban tree in spring.
Where to buy it
Best planted in autumn so the roots settle in before summer, or in early spring once the frost has passed. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, October, November.
Add this plant to my garden →Plants from the same family
- Olive treeOlea europaea
- Wild privetLigustrum vulgare
- LilacSyringa vulgaris
- Green ashFraxinus pennsylvanica
- Narrow-leaved mock privetPhillyrea angustifolia
- California privetLigustrum ovalifolium
Tips generated and checked by Viridia — adapt them to your local climate.