September 04, 2015

Retarding a Vigorous Street Tree

Chinese Elm (Ulmus parvifolia) grows to 10–18 m tall and 15–20 m wide in ideal conditions.  It's tough being a street tree but U. parvifolia is vigorous and resilient in San Francisco.  This one in Noe Valley must have a low water table.  It is never irrigated but is lush.   I prune this tree ever 6-9 months.  Essentially this is a extremely large bonsia.  The soil in the tree basins act more like large containers then expanses of live soil.   

Ready for a trim.  After 5 hours of pruning and two dump runs:

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