In article ,
General Schvantzkoph wrote:

I'm thinking of using some plastic sheeting to form a temporary greenhouse
or more precisely a green tent. I've been using steel garden fencing poles
as plant stakes. I'm thinking of putting them out earlier this year and
using them as tent poles by stretching plastic film over them to form a
tent. I'm hoping this might allow me to get an earlier start, maybe April
or early May instead of waiting to the end of May. When the weather is
reliably warm I'll take the plastic down.
See:
http://westsidegardener.com/howto/hoophouse.html
How to Build a PVC Hoophouse for your Garden

http://www.veseys.com/us/en/?veseys=8029cdugg4vc0rc0bqvauiiig3
They are in York, Prince Edward Island (East of New Brunswick and North
of Nova Scotia), Canada, for cool weather seeds,



I'm in Massachusetts, near New Hampshire.

I have a couple of questions,

1) Am I fooling myself? Will this really be helpful?
It will help. You will lose about 5% of the sunlight, but if you have a
lot of full sun it shouldn't be a problem.

Also, add your amendments to the bed, then cover with news print, and
that with alfalfa (lucerne). Lay out drip irrigation, and cover
everything with clear plastic. It will raise soil temps by 5 - 6 degrees
Fahrenheit.

Tomatoes need soil temps of 70F to grow.

2) What sort of plastic should I use. I see that there are things marketed
as greenhouse films. Are they any better than a roll of plastic sheeting
from Loews or Home Depot?

Either will have cheap clear-plastic painters drop cloths. Better yet,
check with a local hardware store, and keep your money in the community.
--
http://www.democracynow.org/blog/2011/3/7/michael_moore
http://www.youtube.com/watch?v=eZkDikRLQrw