Rhododendron mucronulatum, the Korean rhododendron[1] or Korean rosebay (Korean: 진달래; RR: Jindalrae),[2] is a rhododendron species native to Korea, Mongolia, Russia, and parts of northern China.

The reddish-purple flowers appear in late winter or early spring, often on the bare branches before the foliage unfurls.

The Latin specific epithet mucronulatum means "sharply pointed", referring to the leaf shape.

[3] The cultivar 'Cornell Pink' has light pink flowers, and has gained the Royal Horticultural Society's Award of Garden Merit.

[4][5] It is hardy down to −20 °C (−4 °F) but like most rhododendron species requires a sheltered position in dappled shade with acid soil that has been enriched with leaf mould.