MOUNT VERNON — In these times of high-rising fuel bills, one of the first pieces of advice in cutting energy costs is to lower the thermostat. That is sound advice, but for those who have houseplants, caution must be exercised that the temperature does not get too cold for a sustained period of time.

“The one thing you want to make sure of, is not to go below 55 degrees,” said Troy Cooper, horticulturalist with the Knox County OSU Extension Office. “When they get a little cold, they will just turn a little off color.”

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