On 27 Feb 2004 16:10:48 GMT, ospam (Yngver) opined:

escapee wrote:


Keep in mind that, when the air is 20 degrees, so is the soil in the
container.
To be safe, I'd do what you do, but raise it to 27 degrees. Anything below
that
can really damage the roots. Plants will go dormant at 35 degrees, too. I
have
plants in my greenhouse right now with the winter light and very warm days
and
they are dormant.

Look he

http://www.sws-wis.com/lifecycles/what.html

Okay, thanks. The plants I was thinking of are supposed to be hardy to 10
degrees, so I figured that since they are in containers, I should bring them in
by the time the temps were falling to 20 or so. I didn't know they would go
dormant at as much as 35. I'm not positive, but I thought my hakone grass (in a
container) didn't start to turn brown until it got below freezing. Of course,
I'm not sure hakone grass needs to go dormant either.

Yes, but if it's 10 degrees outside, the soil will never get colder than 27
degrees. In a container, 20 degree air, is the same as the container temp. That
was my point.