pbs Digest, Vol 38, Issue 31

Rodger Whitlock via pbs pbs@lists.pacificbulbsociety.net
Tue, 28 Apr 2020 08:42:53 PDT
On 04/28/2020 05:00 AM, Jim Barton<jimb@customwindowsupply.com> 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 ?" 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?

If you plunge your pots into the ground or a *large* plunge bed, it 
should take care of your problem. If this isn't something easy for you 
to do, then at least move those pots to some spot where they are shaded 
all day long, e.g. the north side of your house.

At the same time, I'd say shade cloth is a good idea too but not 
sufficient by itself to keep the soil temperature in your pots low 
enough for the bulbs to survive.

-- 
Rodger Whitlock
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