In September 2012, the Royal Canadian Mint released the $20 Rhododendron Blossoms Pure Silver Proof as the third coin in the Crystal Dewdrops Series and Wildflower Series and the eighth release in the Swarovski Crystal Flora Program. The image is that of the Pacific rhododendron (Rhododendron macrophyllum) from the North American Pacific Coast, which is enjoyed in gardens across much of North America. The Water Lily Pure Silver Proof (2010) was the first in the Crystal Dewdrops Series and the third release in the Swarovski Crystal Flora Program, while the Wild Rose Blossoms Pure Silver Proof was the second in the Crystal Dewdrops Series and the fifth release in the Swarovski Crystal Flora Program.

The coin's special features are an artistic rendering of two pink-coloured Pacific rhododendron flowers and a bud, three crystals nestled among the rhododendron's petals and leaves, a Finish Proof, a limited mintage (10,000), and a composition of fine silver (99.99% pure).

The coin comes enclosed in a maroon flock-lined clam-shell case, is protected by a black sleeve and has a serialized certificate to document its quality. The coin weighs 31.39 g (1.11 oz US) and has a diameter of 38 mm (1.5 in).