On 5/4/11 6:51 PM, Jeff wrote:
In a moderate climate (Oregon, about 100 miles from the coast), how
practical would it be to try to raise vegetables year-round in a
greenhouse?
- Jeff
www.reframer.com

I know someone who raises herbs commercially year round in greenhouses.
I think she has four of them. She sells the fresh herbs at a farmers'
market.

Besides providing protection against winter frosts and freezing, a
greenhouse protects plants against being beaten down by wind, rain, and
hail (except for severe hail, which can break the greenhouse panes).

With screens for the transoms (windows that open), a greenhouse can also
protect against many insects, especially grasshoppers. However, that
can also prevent the use of bees for pollination.

--
David E. Ross
Climate: California Mediterranean
Sunset Zone: 21 -- interior Santa Monica Mountains with some ocean
influence (USDA 10a, very close to Sunset Zone 19)
Gardening diary at http://www.rossde.com/garden/diary