On Tue, 29 Dec 2009 07:04:43 -0600, AZ Nomad
wrote:

On Mon, 28 Dec 2009 13:10:47 -0800, Steve B wrote:
In another newsgroup, there's a discussion about heating a greenhouse.
Electric heaters were mentioned. Also kerosene, but comments were made
about fumes and stickiness. Someone recommended a plain propane barbecue.
It was stated that the CO2 would be good for the plants. I was wondering
about the CO produced, and what the levels would be.

What is the best/worst ways to do supplemental heat in a greenhouse?

Strange. I always used sunlight to warm a greenhouse.


It depends on how cold the nights are. I use an electric heater at
night to keep the temperature warm enough to prevent stunting the
plants. As soon as the sun comes up I have to watch the thermometer to
make sure that it doesn't get too hot.

The only time I run the heater is when I have seedlings in the
greenhouse. I do not try to grow stuff during the winter since the
quality of produce is not worth the cost.
--
USA
North Carolina Foothills
USDA Zone 7a