Yes, you want to try & keep the trees dormant all winter. It doesn't take much of a warm up for the trees to break dormancy. If that happens you can can lose much of the next flush from dead wood if you get another freeze.

Thanks !

For me he is just a swindler. I have asked him about his hardy citrus and he had to admit that it was just Poncirus. Nothing else! Although in a documentary about his method (simply permaculture) which came on tv in Germany they showed oranges and lemons covered with ice. Pure swindle -or call it fraud!

Depends WHEN you asked him ...

At first he tried out Poncirus ...

I think, that Roberto is right. You can cover plants with snow, but it doesn't work like Sanguinello think. It is nonsense.
I know places in Czech Republic, where they try to grow Poncirus and they are unsuccesfull with it , no matter how much snow they put on it during winter.

Hahahaha ...

If they are unsuccessfull with Poncirus, then they are unsuccessfull with everything ...

Besides I said it is snowing and that snow covers all, not that they put snow on it ...

Yes, you can grow citrus trees in high mountains of Nepal - 1400 meters above the sea level.
http://www.flickr.com/photos/sferox/8235293210/in/photostream

but with one detail - temperature in this place never drop lower than - 3 deg. Celsius.

Ok, all the world admires the success of Sepp Holzer, just Robert and Radoslaw not ...

Ok guys, looks like you have to visit the farm and bring us back pictures
That or we need a south facing mountain with lots of snowfall...anyone have a ski resort? They can send some of their snow making onto the lemons and keep them buried with soft powder...just have to keep the skiers off that pile

Here in Maine we get lots of snow, but it is constantly melting and compacting throughout the winter. It can be very rough on small bushes...my young highbush blueberry branches kept breaking for their first couple of years due to the force of the snow pack compacting down on them. Once they got bigger and tougher they were ok.

It is all nonsense, for example fruits - once go through the frost and they are finished.
In zone 6 you need ultra early citrus variety - which will wake up very soon - I do not know how it is possible in place where, for example you have snow in april and then have to be ripe before first frost.

And the best part of the video above is - like there is symbiose with local nature everywhere, while face of country is totaly changed, with huge
manmade ponds etc. I really like this noninvasive agriculture.

I do not belive that he is growing lemons in Austria. Austria which is colder than Denmark in winter. Even Ichang lemon is not possible there.

The point of permaculture is to grant a permanent harvest.

Conventional culture destroys the ground and makes a desert on the long run.

Sepp Holzer took a wood monoculture with a degraded soil (Podsole) and turned it into a rich garden with very good soil and exceptional harvests in an extreme bad climate and and an area where never before vegetables and fruits could have been harvested.