Picea sitchensis'Renken' is one of the smallest of the Sitka spruce selections available anywhere. Growth is quite small and very dense, typically growing less than 1 inch (2.5 cm) per year. The needles are a pleasing silvery Blue-green and are quite prickly, typical to the species. After 10 years the gardener can expect Renken to grow to approximately 1 foot (30 cm) tall and wide.
This selection has been in cultivation since the early 1990s. It was propagated from a witch's broom mutation found by Werner Wüstemeyer in Germany. Wüstemeyer chose cultivar name, "Renken" in honor of the family who owned the property where he found the broom.
Picea sitchensis 'Renken' featured at Glacier's End Arboretum, Olympia, Washington. This is an 8-year old specimen measuring approximately 8 inches tall and wide.
Photo by David Olszyk
Picea sitchensis 'Renken' — an old specimen in a private garden in the United Kingdom.
Photo by Stephen Grubb