permaculture

[jeremy baker <childscrick@yahoo.com>]

It’s a interesting question Christian. A fun design idea popped to mind: a 
sloped trench that is cool at the deep end and warmer at the entrance. 
Natural convection and radiation would warm the space and cool the space. It 
would be fairly stable due to the high mass around it. Cool things like food 
could be stored in the deep end. The low roofed cold frame covering it could 
slope into the ground as well. If your soil is easy digging, few rocks or 
clay, and well drained then it’s very feasible. If it has a high water table 
or prone to flooding, then that’s another matter. We have been using 45 mil 
pond liner for living green roofs. The deep end could have a layer of pond 
liner or ferrocement with some soil placed back over the top. Jeremy 


Sent from Yahoo Mail for iPad


On Wednesday, December 5, 2018, 8:37 AM, Lawrence London 
<lfljvenaura@gmail.com> wrote:

If you are in Germany or Austria take a look at the root sellars high
country dwellers use to store their produce during winter.
Those who are too isolated to be able to bring in produce from towns nearby
regularly will rely on root cellars that work reliably.
Adding growhole/greenhouse production t one is a different matter. I would
think you could to one or the other but not both.
My Grandparents in Pittsboro NC USA had a bug below-ground cold frame with
windows. They successfully stored two Ponderosa lemon trees (bushes)
in big metal tubs in them each winter and brought them out in the spring.
They bore grapefruit-sized flavorful lemons. They stored potatoes in their
below ground, dirt floor and walls, basement. It was definitey not humid in
that environment.

On Wed, Dec 5, 2018 at 2:58 AM Christian Skiba <c.skiba@gmx.de> wrote:

> Thanks Lawrence and Jeremy,
>
> yes, the root cellar is used for food storage only in winter.
> Potatoes, apples, cabbage and celery for example need a humidity of
> about 90 % at a temperature of 35-32°F.
> So dry air is not really needed.
> It will be build in the highlands, 750 m above sealevel, USDA plant
> hardiness zone 6a.
> My priority is to raise up the temperature in the greenhouse in winter.
>
> I give it a try and will inform you about the results.
>
>
> Am 04.12.2018 um 17:48 schrieb jeremy baker via permaculture:
> > This is Jeremy in Skagit Valley, WA. Living intimately with the
> climactic variations of the year appeals to me. The concept of “season
> extenders” is fun to play around with. Diving into the ground like a
> tortoise or badger makes a lot of sense. I would hope a root cellar would
> be about empty by the time it starts to warm up. Then the space might be
> used for other things temporarily.
> >  Perhaps dig a test hole and experiment with it. A friend showed me a
> deep hole covered with tempered glass.  Inside he had several overwintering
> house plants. I have several cans and buckets of paint that say “do not
> freeze” on them. I’m thinking of digging a hole for them while I go to Baja
> lol.  Jeremy
> >
> >
> > Sent from Yahoo Mail for iPad
> >
> >
> > On Monday, December 3, 2018, 12:54 AM, Christian Skiba <c.skiba@gmx.de>
> wrote:
> >
> > Hello,
> >
> > I'm planning to build an underground greenhouse with an earth cellar.
> >
> > As benefits I see
> > - more (earth-) heat radiating wall surface in winter
> > - one instead of two construction sites (one big hole instead of two
> > small ones)
> > - possibly the use of CO2 from the storage crops for the greenhouse
> > plants (during the day)
> >
> > I think in the summertime there must be a closed door between them to
> > prevent the cellar to be heated by the greenhouse.
> >
> > Would you say that there are other advantages when combining this two
> > elements?
> >
> > Are there any disadvantages?
> >
> > Greetings from Germany
> > Christian
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-- 
Lawrence F. London, Jr.
lfljvenaura@gmail.com
https://sites.google.com/site/avantgeared
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