https://rhododendra.com/rhodos/10538
R. 'John Britten' Rhododendron Hybrid parentage | Rhododendra
R. 'John Britten': Rhododendron Hybrid. Hybridized by Sligh, B.. Bloom time: early midseason. Seed parent is R. 'Butter Brickle'; pollen parent is R. arboreum...
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