RE: CULT: question - frost heave

Susan Boyce <utahirisgal@hotmail.com> wrote:
<< Linda,
here in Utah Our rule of thumb 
is get it into the ground 6 weeks before the first freeze. I try 
to get everything done by Labor Day at the extreme latest. I want to have 
those rhizomes get as many and as deep a root system in place before the 
ground freezes hard. >>

 

I follow the same practices as Susan; I would say that it represents the common wisdom about planting irises here in Utah. I have never experienced any particular problems with frost heaving. Once the ground freezes hard here, it generally stays frozen until the general spring thaw occurs in March (no alternate periods of freezing and thawing during the winter), so the rhizomes are literally frozen tight and can't heave.


 



Jeff Walters
in northern Utah
(USDA Zone 4)
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