Re: CULT: cold
From: Ellen Gallagher <e_galla@moose.ncia.net>
>From: inanda@pacificcoast.net
>
>What is the coldest zone where TB's will survive, well covered with
>snow?
>4b was fine for me in Ontario. What about zones 3 & 2? Hm ... or only
>setosas.
>Ginny in balmy Victoria BC not Oz, zone 8
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Ginny et al,
You were here in June '97, Ginny, and saw Cantina and a few other TBs in
bloom in our Zone 3a. They do fine in Zone 3 with a reliable snow cover
like we have here in the mountains. As we have discussed previously on the
'old' iris-l, the cold is not the problem, it is the thaw, freeze cycles that
stress the bearded especially TBs. We are frozen until April (sometimes
later) and the ground warms up rapidly. Almost no freeze - thaw for us...
we don't have any January 'thaw' that besets the upper zones.
USDA Zone 3 is also fine for Japanese irises, BTW....more are being sold
and grown around here every year. Good acid soil and plenty of rain
are contributing factors and the white mulch. :)
Cheers,
Ellen
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Ellen Gallagher / e_galla@moose.ncia.net
Siberian iris robin / sibrob@ncia.net
Northern New Hampshire, USA / USDA Zone 3
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