50+ California Pink Azalea Seeds Rhododendron macrophyllum Flower Shrub Bush Tree Grow Zones: 4,5,6,7,8,9 Other Names: Big Leaf Rhododendron, Pacific Rhododendron, California Rhododendron, California Rosebay, Coastal Rosebay Pacific Rhododendron is the state flower of Washington. This beautiful bushy shrub tree grows easily as an erect compact. It is found growing natively throughout western North America and near coastal regions. Rhododendron macrophyllum is a literal translation of the phrase: "Rose Tree With Big Leaves". It blooms huge showy pink flower clusters and can grow to be around 25 ft. wide and 15 ft tall if given the space. Pruning is an option if you wish to restrain the growth. Blooms from April through July. This broadleaf evergreen shrub looks close to the western azalia and/or the pacific madrone. Add this attractive show stopper to your landscape by growing these bright blooming bush and hedge seeds today!