Hot Pots

Jane McGary via pbs
Tue, 28 Apr 2020 09:31:31 PDT
I used to line the sunward side of flats with a strip of styrofoam sheet 
insulation to prevent too much heating on that side.

However, you could produce a sand plunge without much effort by having a 
few yards of sand dumped in your work area, and just plunge the pots in it.

Jane McGary, Portland, Oregon, USA

On 4/28/2020 6:49 AM, Tim Eck via pbs wrote:
> If you are concerned about radiant heating from the sun, you only need to
> protect the side of the pots that receive low angle insolation.  And if you
> have a cluster of pots the outer ones will shade the interior ones.  In my
> overwintering sun-porches, I solve this with a strip of opaque plastic
> affixed to the south walls from the shelf up to the height of the pots.  In
> the summertime I have no problem with morning sun because of trees or
> mid-day sun because of elevation, but I need to protect the western to west
> by northwestern exposures toward sunset.  An empty row of pots works well
> or any opaque plastic or barrier will do.  Some nursery suppliers even sell
> a "pot within a pot" system for trees.
> A moist, loose soil with lots of air porosity is the worst actor because it
> will act as a heat pipe, conducting the hot water vapor toward the interior
> of the pots, killing far more roots in the process.
> Tim in Pennsylvania
> On Mon, Apr 27, 2020 at 8:05 PM Jim Barton via pbs <
>> wrote:
>> Does anyone grow California native bulbs in 1 gallon black pot in the
>> Central Valley of California? The growing medium in my pots is becoming
>> much hotter than the native soil where many of my bulbs are planted. Last
>> weekend I made a shade structure of ½" gray PVC pipe and shade cloth, in an
>> attempt to keep the pots cooler. The heat seem to be drying out the stems
>> before they finisher blooming. Any other ideas?
>> Jim Barton
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