Re: RE: Cult-Freeze Damage
- Subject: Re: [iris-talk] RE: Cult-Freeze Damage
- From: D* E*
- Date: Tue, 16 Apr 2002 06:37:10 -0500
Chuck writes:
>
>It would seem that it's the amount of soft growth that is present when cold
weather comes that determines survival. The gradual onset of winter allows
the plant to go into dormency whereas sunden change of weather catches the
plant by surprize and does damage. The amount of growth hormone present also
would seem to play a role re amount & degree of damage.
This observation agrees with my own. Plants suffer stress on sudden
temperature changes, whether in spring or in fall. Unfortunately it is a
regular feature of our weather. A feature not necessarily confined to
spring and fall either. Our winters can, and often do, give several weeks
of ideal growing weather. If the duration is long enough, the plants start
responding and depending on the plant and the growing conditions (or
location) can begin growing rapidly. For me, planting in a somewhat
protected place can have a negative effect at times if growth ensues and is
followed by an extreme change in temperature. As Linda pointed out earlier,
the duration of the weather patterns also make a difference. Short spells
alternating don't seem to cause as much set-back as longer alternating
spells.
How does the growth hormone work? Is the hormone production triggered or
inhibited by the duration?
Donald Eaves
donald@eastland.net
Texas Zone 7b, USA
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