Re: Re: TB: Tenderness
- Subject: Re: [iris-talk] Re: TB: Tenderness
- From: J* a* C* W*
- Date: Mon, 23 Jul 2001 07:47:00 -0600
> From: wmoores <wmoores@watervalley.net>
> As as been stated, I think all irises are winter-hardy, but quite a
> few are tender - even as far south as Zone 8 and maybe 9. Chuck
> Chapman lists tender varieties for his area in his catalog.
>
> Some varieties will start a rapid growth pattern as soon as there is
> an ounce of warmth for several days during winter, usually late
> January or early February here. If this warm period happens to last
> a week or more, and is then followed by a drastric drop to the low
> twenties or upper teens, many susceptible varieties can be killed by
> the sudden changes. This situation happens about every five to seven
> years in this location, and that is why I try to avoid those
> varieties listed as having a blooming season of 'E.' A lot of the
> E's' are the ones that have this early growth pattern in my zone.
Walter,
The earliest TBs to bloom here in the spring are the rebloomers (need to
get their spring bloom out of the way so they can get ready for the main
event). They can get themselves into rot problems, but usually they manage
to grow their way out of them. Sometimes, however, I lose the spring bloom
to frost because they try to bloom too early and the fall bloom to frost
because they try to bloom too late.
Jeff Walters in northern Utah (USDA Zone 4/5, Sunset Zone 2, AHS Zone 7)
jcwalters@bridgernet.com
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