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These two Dawn Redwood are mentioned in the Royal Horticultural Society magazine "The Garden" November 2005 Volume 130; Part 11, where the author, Roy Lancaster, says they were 3.6m (12ft) high when planted 20 years ago (circa 1985) and were 9m (30ft) and producing cones at time of writing (2005) This would signify a growth rate of .27m (just under 1ft) per year.

They are now both some 20m (65ft) high, so if the previous figure is accurate they would have achieved a growth of 3.6m (12ft) per year over the past 3 years. Perhaps more likely is that the 2005 measurement was rather under-generous and the two Dawns' growth rate over 33 years will have been 0.6m (2ft) per year - a far more realistic figure. The other possiblity is that the magazine article was either written much earlier than its published date, or was including much earlier data.

Year Height Comment
1985 3.6m (12ft) Planted
2005? 9m (30ft) As per RHS article
2008 20m (65ft) Redwood World measurement

In the aforementioned RHS article: "Street tree revolution", Paul Akers (Arboricultural Manager for the City of Westminster) said that these two trees had established well, and following some initial crown lifting they now require minimal pruning.

Common Names and Latin Name No. Latitude and Longitude OS National Grid Elevation
(above sea-level)
Height Girth Date Measured
Dawn Redwood
Metasequoia glyptostroboides
1 N51.50029
TQ 28024 79538 44ft
20.2m 1.32m September 2008
2 N51.50021
TQ 28025 79529 48ft
20.4m 1.49m September 2008
Girth was measured at 1.5 metres from ground

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