Thanks, Lemandarangequatelo! This night was -7 C outdoor, +3,9 C inside the greenhouse.

As I was looking at the greenhouse I realized that there is no entrance ...so how do you get in ?

Daniel, my greenhouse has removable roof.

I don't remember , what depth ?

It is about 1,15 m. One man from the my web-board has greenhouse with 2 m depth. He said that he have had about 0 C when was -30 C outside without additional protection. Only plastic glasses - "policarbonate".

good to know that , thanks

serj what's new ? , we have a "summer season" here two weeks now

Here is pic of my ponderosa with fruits. This pic was taken two days ago.

I see that they are ok now , great job serj

Thanks, Daniel! But the earth is cold. The temperature inside the greenhouse is +2,8 +3,2 C. I lost two fruits on my clementine tree.

when you measured that what was the outside temp?

There is no difference between 0 C? +5 C, -10 C. The temperature inside is fluctuated in range +2,8 +3,2 C. You should visit our web-board. We have new pics from other members.

It was -19 C five days ago. There was no snow Inside the greenhouse was +0,4 C I expect spring for opening my greenhouse. Ii is interesting to see my citrus tree

I bearly wait to see them

Great work Serj, your trench greenhouse works really well! Is it possible to make your trench wider and still have the same great insulating effect? Or would the insulating effect be less because the soil walls are too far apart?