Iris tectorum

Jane McGary
Mon, 19 May 2003 11:18:00 PDT
My understanding of the term "roof iris" is that this iris was sometimes 
allowed to grow on thatched roofs to help hold hte thatch, but it seems 
more likely that it would break it down. Plants on sod roofs, however, are 
useful and beautiful, as often seen in Alaska.

Regarding the hardiness of I. tectorum, it seems quite cold-tolerant and is 
grown in many parts of the USA, including northern states. It does well 
here until the slugs get hold of it--none of the crested irises can survive 
them, even I. tenuis, which is native not ten miles away (and higher up in 
the mountains, above the slugs).

Jane McGary
Northwestern Oregon, USA

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