About 500 Coast Redwoods were planted since 1969 in different areas and grow very well. Measurement = maximum girth/height.
Burgholz is the biggest arboretum in Germany. Perfect conditions for Sequoia sempervirens (wet/foggy/shady slope).
Also ca. 1000 Giant and Dawn Redwoods in Burgholz.The girth of the tree, measured at a height of 1.30 m, is 3.17 m (Mar 2012, RedwoodMike). Its height is exactly 34.10 m (Mar 2012, laser with Sine method (e.g. Nikon Forestry 550 laser rangefinder), RedwoodMike). This tree was planted around the year 1969 ± 2, which makes it around 46 ± 2 years old (RedwoodMike, Jul 17, 2012).