Tue, 13 Nov 2007 11:03:11 PST
Cold damage occurs at various temperatures.

For sensitive plants such as tropicals, chilling damage occurs below 55 
degrees F. This is true for the previously mentioned basil and coleus.

For hardy plants, the damage occurs at 32F or below. And as has been 
noted in earlier posts, it often occurs somewhat below 32. The reason: 
plant cells contain various components which act as a sort of 

When plants are unexpectedly freeze-damaged, the gardener can often 
prevent permanent damage ( at least in part) by hosing off the the 
affected plants before sunlight suddenly thaws the tissues.

Jean, in Portland, OR

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