[Downtown]

These are really amazing. They are called, walipini (an Aymara Indian word for a "place of warmth"), and you can also keep small livestock in them (chickens, rabbits, etc..). Since they create a low profile, they are not as easily seen, so you can keep your area a bit less attractive to people passing through..

Build a $300 underground greenhouse for year-round gardening (Video) : TreeHugger

 

[Downtown]

Here's the design manual..

http://www.bensoninstitute.org/Publication/Manuals/Walipini.pdf

 

[Smitty901]

Along the same lines crops that grow in the cold.
I was shocked this year. We had a strange year winter wheat was very late. I rent some land out the people that farm that land plant a white radish very late in the year. The reason is a ground cover that puts nitrogen back in the soil and it keeps the ground loosened up .
However they can be a food source. Strange part they grow in cold weather and do not die off until 18 degrees.
Reeducation time for me.

 

[Jardude]

Along the same lines crops that grow in the cold.
I was shocked this year. We had a strange year winter wheat was very late. I rent some land out the people that farm that land plant a white radish very late in the year. The reason is a ground cover that puts nitrogen back in the soil and it keeps the ground loosened up .
However they can be a food source. Strange part the grow in cold weather and do not die off until 18 degrees.
Reeducation time for me.

Radish doesn't fix N.

Good idea Dt.

 

[Smitty901]

This time of year we are 20-mid thirties at night the darn things are still growing and nice green fields.
Many crops trap and put nitrogen back in the soil . Any year you grow corn after peas far less nitrogen
is needed. That is another reason you rotate crops.
This radish grows long like a carrot . I need to do some home work . The tops of most radish plants are good to eat also.
Any crop that can extend a growing season 2-3 months here is a big plus.

 

[Jardude]

Any year you grow corn after peas far less nitrogen

Peas are a legume.

Legumes fix N.

Radishs are not a legume and don't fix N.