Great Laurel, Rosebay Rhododenron
Unique evergreen plant with large strap-like leaves, beautiful clusters of late blooming flowers.
|USDA Hardiness Zone
|3 - 7
|Canadian Hardiness Zone
|1a - 7a
|RHS Hardiness Zone
|H7 - H5
|(-37) - (-12)
|(-35) - 10
|A later blooming species with a large open and loose form. Long strap-like, medium green leaves are whorled around the stem and give rise to large clusters of inflorescences.
|A nice focal point in a shade garden, use as a screen or the margins of a wood.
|Thrives in part to full shade in acidic, moist well-drained soils.
|Upright, multi-stemmed, evergreen shrub, open and loose, broadly spreading, and often forming thickets.
|Crown rot, dieback, aphids, powdery mildew, and leaf scorch.
|Forests in cool, damp bog-like conditions.
|Bark is brown with shallow furrows between elongated scales.
|Flower/Leaf Bud Description
|Large ovoid flower buds are 1.2 cm pubescent a yellowish-lime green in colour and emerge into a white inflorescence.
|R. maximum has large, 10-20 cm long by 4-6 cm wide, dark to medium green leaves, light green to bronze underneath. Leaves are alternately whorled around the stem. The leaf blade is lanceolate to elliptical with entire margins, and a prominent central vein.
|Monoecious; up to 25 inflorescences are borne in large clusters, each inflorescence measures 2.5-5 cm across and is held up by four leaf-like bracts, five white concave petals are dotted in an olive colour.
|Cinnamon brown, dehiscent, elongated pods are 1.3 cm in length and split along five lines to reveal tiny seeds inside.
|Leaf texture is likened to a leather strap.
|Semi-ripe cuttings in late summer, 10 cm in length, insert into a propagator with bottom heat. Seeds should be surface sown on fine peat moss as soon as they are ripe and planted in the spring, germinate between temperatures of 13-16°C.