Credit: David Foley
Davidia involucrata
Background and story
The Handkerchief Tree (Davidia involucrata) is a highly distinctive deciduous tree native to central China, best known for its remarkable spring display of large white bracts that hang like handkerchiefs or doves from the branches.
It was introduced to Ireland and Britain in the early 20th century by the plant collector Ernest Wilson, who helped popularise it following earlier discoveries by Père Armand David.
Its elegant form and unusual flowering quickly made it a prized specimen tree in botanical collections and larger gardens, valued as much for its curiosity as for its beauty.
Did you know?
Its “flowers” are actually leaves in disguise. The showy white structures are bracts, not petals, surrounding a tight cluster of tiny flowers and acting to attract pollinators.
Hardiness and conservation
The recorded RHS hardiness rating is H5, which means this plant is hardy in most places, including many severe winters, provided other site conditions are suitable. The recorded USDA/PFAF hardiness value is 6, which is useful as a broad winter-temperature guide, but it should not be read as a direct substitute for the RHS rating. Local hardiness always depends on local shelter, drainage, winter wet, salt-laden wind and the plant’s age and establishment.
The IUCN Red List status recorded here is Not Assessed (NA).
Additional notes for Ireland and Britain
In Ireland and Britain, Davidia involucrata is hardy but somewhat slow to establish, performing best in sheltered sites with deep, fertile, well-drained soil. It prefers consistent moisture and protection from strong winds, which can damage young growth and flowers. Over time, it develops into a graceful small to medium-sized tree, typically reaching 10–15 metres, with a broad, rounded crown. Flowering can take many years to begin, often a decade or more, but once established, it can produce a striking and memorable display each spring, especially in mild, damp climates.
From a conservation and hardiness perspective, Davidia involucrata is not currently considered globally threatened, though it has a naturally limited distribution and has been affected by habitat change in parts of its range. In terms of hardiness, it tolerates moderate frost (typically down to around −10°C) and is well suited to many Irish conditions, particularly where soils are fertile and moisture levels are consistent. Its main sensitivities are exposure and drought rather than cold, making careful siting important. In an Irish context, it is a rewarding specimen tree for those willing to wait, offering one of the most distinctive flowering displays available in temperate gardens.
Notable features
- It is the only living member of its genus. Davidia involucrata is monotypic, with no close relatives alive today, although fossil evidence shows it once had a much wider distribution.
- Its white bracts may serve multiple functions. In addition to attracting insects, research suggests they may also protect pollen from rain by acting like umbrellas, an unusual dual role.
- It can take decades to reach flowering age. Trees often require 10–20 years (sometimes more) before producing their famous display, which explains their rarity in younger gardens.
- Its seeds are famously slow to germinate. The hard fruits can contain multiple seeds, but these may take two to three years (or longer) to germinate, making propagation slow and unpredictable.
Earlscliffe notes
We have two plants at Earlscliffe in different parts of the garden. Both have been flowering for some years.