Judas Tree

How to grow Judas Tree

Written by the GardenDecoded editorial team · Last reviewed 21 July 2026 · Written for UK gardens · How we research our guidance

Planting

Plant young, in spring, in a warm sheltered spot with sharp drainage. It resents root disturbance, so move it as small as you can and avoid transplanting an established tree. Cold wet winter soil is the main cause of failure.

Pruning

Prune as little as possible; it does not respond well to hard cutting. Remove dead or crossing wood in late summer only.

Propagation

Seed germinates after scarification and cold treatment, but growth is slow and plants take many years to flower.

Pests and diseases

Coral spot can colonise dead or damaged wood, showing as pink-orange pustules; cut back to healthy growth. Verticillium wilt causes sudden branch dieback.

Value to wildlife

Early flowers give bees a nectar source before most trees are out, though it is a Mediterranean species with little value to specialist native insects.

Notes

The magenta-pink flowers come straight out of the bare branches and even the trunk, before the rounded leaves appear. It is slow to establish and can take a decade to start flowering properly.

This guidance was researched and written by GardenDecoded — see our editorial policy for how guides are checked and reviewed.

Other names for this plant

These names have all been used for Cercis siliquastrum but are no longer the accepted name. You may still meet them on old labels, in books, or in nursery catalogues.

Others in Cercis