• Subject: Re: CULT: root zone temperature?
• From: g*@aol.com
• Date: Mon, 22 Nov 2010 20:20:42 -0500 (EST)

Years ago (1970's) they did a study on Long Island.  They reported then that
roots continue to grow till the soil temperature drops below 45 degrees.
Whether this is current I do not know.









-----Original Message-----
From: Linda Mann <lmann@lock-net.com>
To: iris <iris@hort.net>
Sent: Mon, Nov 22, 2010 8:40 am
Subject: [iris] CULT: root zone temperature?


Anybody know (or guess) what the soil temperature is in the root zone

when roots stop growing in CA/Oz or Salem, OR?



What root zone soil temperature is during the "usual" dig and

replant/end of shipping season there?  August for CA and OR.



Margie, do you know the soil temp when it's too late for transplants to

do well?



I've been wondering if the 8 new GBKs here that haven't grown roots much

would benefit from some extra warmth.  All the potted stuff is next to

the house for ease of watering and weeding, but it's not full sun, so I

could move these out to full sun and cover with extra plant bed cover

and add water bottle/solar heat absorbers.



Always experimenting!



Linda Mann east TN USA zone 7



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