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Re: CULT: Short stalks

  • Subject: Re: [iris-talk] CULT: Short stalks
  • From: donald@eastland.net
  • Date: Tue, 21 May 2002 14:35:07 GMT

Jeff writes:
> I think it depends on what stage of development the 
stalks were in when you
> had a spell of cold weather. We had hard freezes here on 
the nights of May
> 6 & 7 (just when most of my irises were beginning to 
stalk up), and now
> nearly every mature clump has stalks from down in the 
fans to up in the sky
> and everywhere in between.

I think this is what happens.  I personally am doubtful 
there is much involved via the genetic makeup other than 
plants whose genetic growth tends to coincide with the 
usual late cold snaps.  So if the timing is right (wrong?), 
the plant may end up with a short stalk.  I also think only 
a very few hours of growth (a small window) makes a 
difference, so you see both tall and short stalks on the 
same clump.  Many cultivation variables could cause the 
plant growth to be at the susceptible stage regardless of 
the genetic makeup.  The genes would be factor inasmuch as 
the natural growth rate inherent in a plant growing in 
climates that tend to promote growth at the wrong time.  
But I doubt any iris is immune to the effects.  Depending 
on the stage of growth and the timing of the freeze, I 
would expect any to exhibit the effects when they are 

An opinion based on the variability of the effect seen 
under my variable growing conditions.  I've pretty much 
seen the stunted stalks on most everything at one time or 
another IF they are cultivars that bloom every year.  This 
last limits the numbers so it has to taken with the 
proverbial grain of salt.

Donald Eaves
Texas Zone 7b, USA
> Jeff Walters in northern Utah  (USDA Zone 4/5, Sunset 
Zone 2, AHS Zone 7)
> jcwalters@bridgernet.com
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