'Haaga' is an extremely hardy, mid-sized rhododendron hybrid. The pink flowers, with a darkly spotted upper petal, cover the shrub in mid-June. ‘Haaga’ is a hybrid of R. brachycarpum var. tigerstedtii, known as the Mustila Rhododendron, with pollen from 'Dr. H. C. Dresselhuys'. It has a regular round shape, growing about 1.5m in 10 years. The specimens planted in Alppiruusulaakso (Rhododendron Valley) in the early years of this century have already reached 2m.