Rhododendron 'J.R.R. Tolkien'
19901514 Cultivated material
Rhododendron 'Jacksonii'
19698669 Cultivated material
Rhododendron 'Java Rose'
20130777 Cultivated material
Rhododendron 'Jazz Band'
19943023 Cultivated material
Rhododendron 'Jean Alexander Du Bray'
19901515 Cultivated material
Rhododendron 'Jeannin'
19598074 Cultivated material
Rhododendron 'John Cairns'
19587219 Cultivated material
Rhododendron 'Jutland'
19587177 Cultivated material
Rhododendron 'Mrs J. Comber'
19568850 Cultivated material
Rhododendron 'Mrs J.C. Williams'
19774087 Cultivated material