Bio permaculture 04a.6: tricks in the
greenhouse / hothouse
Fabrics, glass or plexiglass - seedlings - pit greenhouses -
don't use plastic films (PVC) and PET bottles release
microplastics into the air, they are polluting the air
A bus in the sunshine becomes VERY hot [37] - Mobile
mini-greenhouse for seedlings 01 [36] - Seedlings in egg
shells [4] - Mini greenhouse for seedlings [39] - Seedlings
beds covered with jute [12]
The super raised bed greenhouse 03 [19] - The tube pit
greenhouse by Roald Gundersen in Wisconsin [49] - Pit
Greenhouse in Bozeman, Montana (Canada) - Interior view with
cold air ditch and water barrel heating [54]
Fabrics, glass or plexiglass - seedlings - pit
greenhouses - don't use plastic films (PVC) and
PET bottles release microplastics into the air,
they are polluting the air
1. Grow the seedlings in the greenhouse -
protection against birds
Sowing seedsin a primitive and simple gardening not using
mulch the result will be like this: many seeds are not
germinating, or they are eaten by birds [web03]. So there
are measures: one can cover the planting bed with mulch
and the birds will not see the seeds (see the website
about mulch
and mulching). When the sowing action is in a
greenhouse there is much more wamth and seeds germinate
much faster. They are germinating in a very reliable way
with high temperatures and they are protected from birds
[web03].
Greenhouse made of old windows [34] -
Old Bus as a greenhouse [37] - Interior [38] - Mini
greenhouse on a rear window in a car, drawing [41]
In metal vehicles, the sun is very hot, even hotter than
in a greenhouse, and the plants grow very fast ...
Best greenhouses made of old cars, bus vehicles, train
coaches
With old cars or old bus vehicles (without motor, no axes,
no tires) or also with old railway cars one can install
them in the sun so there will be excellent greenhouses
with them because the body work and the windows will
become really hot in the sun, partly over 50 degrees.
Paint it black and it will even become hotter. When the
vehicles are half in the earth, in winter the earth will
give a certain heating so it's not so cold inside.
Pit greenhouses made of cars, buses, coaches
Being installed half in the earth underground this comes
out as a pit greenhouse which can be used also in winter
times because the earth walls are equilibrating the cold.
Website about pit greenhouses "Walipini" see here - link.
But there are more tricks:
Accelerate germination with covered raised beds:
To accelerate germination, you can cover bordered planting
beds or raised beds with jute. This causes a higher
humidity and a higher temperature. It saves at least one
week during the sprouting of seeds. Concretely, e.g.
carrot seeds were scattered and for germination, the beds
were covered with jute bags. The seedlings do not dry out
and are not eaten by birds [web03].
Seedling beds covered with jute [12]
Plexiglass hardly weathers, is UV-resistant [web13]
Plexiglas is more transparent than glass with a
transparency coefficient of 0.93, is very stable, is
hardly weathering, moisture does not matter and is also
resistant to chemicals. Outdoor plexiglass can harden and
become brittle due to temperature fluctuations. Plexiglas
is easy to cut. Plexiglas needs good care. Over the years,
it tends to become yellow. Plexiglas can serve as a roof
for undemanding people [web14].
[Yellow is a warm color and is therefore a positive color
for growing plants - see the healing forces of the colors
- link].
Seedlings in several layers: seedlings can
be stacked - but the seedling greenhouse must be made of
fabric, glass or plexiglass and must not be a plastic
foil, because plastic releases microplastics into the air
and causes air poisoning.
Stack
seedlings in small greenhouses - it must be
cloth, plexiglass or glass
NO plastic and NO plastic air - And it should
be storm proof ...
Seedlings can be stacked in the small greenhouse
[33]
Seedlings can be stacked in the glass cabinet
[15]
Stack mini greenhouse to
seedlings [40] - It must NOT be plastic
because plastic releases microplastic into the
air and poisons the air.
Mini greenhouse on house
wall [31]
Stack mini greenhouse to seedlings [39]
Mobile seedling greenhouse: You can set up a
mobile seedling greenhouse with glass on a big cart so
that the greenhouse then moves from field to field to
transplant the adult seedlings into the flowerbeds
[web03].
Mobile mini greenhouse for seedlings
01 [36] - Mobile mini greenhouse for seedlings 02 [42]
The mini-greenhouses may be made of fabric, glass or
plexiglass, NOT of plastic foil / film, because there is
constantly microplastic in the air.
2. Tricks with seedlings
For seedlings there is no need to use plastic holders, but
instead
-- seedlings germinate in toilet rolls [web05]
Fold toilet rolls and put them in egg cartons
[10]
-- seedlings also germinate in egg cartons [web06] or in
egg shells [web10]
Seedlings grow in egg cartons [3] - seedlings grow in
eggshells [4]
3. Cover seedling beds: Cover the seedbed
- cover the seedlings
In order to protect the seedlings from birds and at the
same time to create higher temperatures for rapid
germination, the seedling beds can be covered with
transparent cloth - but better is of course glass,
plexiglass or cloth or jute:
Aufklappbares Keimlingsbeet muss aus weissem Stoff sein
[14]
because plastic (PVC) release microplastic into the air
and poison the air.
Cover seedlings individually with glasses etc.
Or you can also individually cover the seedlings with
glasses:
Cultivation bell in a Victorian style
[16]
Using sawn, half PET bottles for seedlings provokes
microplastics polluting the air.
Trick: Vegetables and herbs can be regrown
in a glass of water
Video: Let grow kitchen waste: with
this tip, the vegetables sprout again and again. Top
recycling! (1'23 '')
(original German: Küchenabfälle nachwachsen lassen:
mit diesem Tipp sprießt das Gemüse immer wieder. Top
Recycling!)
Video: Let grow kitchen waste: with this tip, the
vegetables sprout again and again. Top recycling! (1'23
'')
Video: Küchenabfälle nachwachsen lassen: mit diesem Tipp
sprießt das Gemüse immer wieder. Top Recycling! (1'23'')
https://www.youtube.com/watch?v=DAxb3_HS1rE - YouTube
channel: Gesundheitsblatt
- uploaded on Jan. 15, 2019
Regrow vegetables and herbs in a glass of water
Lettuce: let stand 5cm and let the root
regrow in a glass of water goes with lettuce (after 5-7
days plant it in the raised bed) (10 '')
MINT: use up the side leaves, let intact the
leaves at the top, in the glass of water the roots grow
back again (17 '')
LEEK: leave 3cm from the root, in a glass of
water the roots grow back, transplant after 5-7 days (28
'')
CELERY: Leave 5cm from root, roots grow back
in water glass, plant after 5-7 days (37 '')
BASIL: use up the side leaves, let intact
the leaves at the top, roots grow back in a water glass,
replant it when the roots are 5cm long (46 '')
ONION: Cut around the root and leave about
3cm, put this in the soil and so new onion is growing
again (56 '')
GARLIC: Lay a garlic clove in a horizontal
way flat in the soil and cover with approx. 2cm soil (1'2
'').
[These experiments are not confirmed yet. Try it out
yourself if it works good or not].
4. Automatic watering with water kettle
and shoelace irrigation
Automatic irrigation with kettle and cut shoelaces [59]
Shoelaces and water kettle: Buy some
shoelaces and cut off the ends. One end is installed deep
in the root area of the plant and the other end is
connected to a water-filled kettle. The plants suck the
water coming from the shoelaces.
Different shoelaces: The cut shoelaces let
pass the water differently. Round laces let pass the water
more easily than flat shoelaces. Accordingly, the
positions of the plants must be differently according to
the cind of shoelices being applied. In summer always
round shoelaces for much water transport.
It was surprising to observe that the plants suck their
water above all during the night, and are also growing
above all during the night.
Shoelace irrigation: plants absorb more water during
the night than during the day - plants grow more at
night than during the day (!) - in summer, the water pot
must be higher
Surprisingly, the following could be observed:
-- that the plants suck water above all during the night,
and are growing above all during the night
-- that in summertime in glaring sunshine this shoelace
method DOES NOT WORK because the sun dries out the laces,
in half shadow or in the shadow it's working, respectively
-- in summer with bright sunshine and water pot must be
above the plants, in spring and autumn with less sunshine,
the water pot must be lower, so that the plants are not
"overwatered"
-- very good is also forming a net of connections between
the plants with shoelaces so the plants can exchange
signals and minerals.
5. Build small greenhouses - the
mini-greenhouse for the garden
A greenhouse is warming by transparent areas in sunlight:
-- with old windows
Folding mini greenhouses made of old
windows [9] - Seedling beds made of old windows that are
inclined [13]
Plastic films are to be rejected because they release
microplastics into the air and poison everything.
With enough space, you can also use straw bales to build
small greenhouses, and eventually one can install a "hot"
permaculture soil with a compost layer in the soil. Not
use plastic film, otherwise the air is poisoned with
microplasitk - it must be glass or plexiglass or fabric.
[The color of the fabric has to be tried out what is best,
red perhaps, the hottest color? Yellow, orange and red are
hot colors, green half cold, blue cold, brown is warm
again - see Healing
forces of colors].
Straw bales are a good
insulator (an R value of 1.5 to 3 per inch).
Underground fertilizer will also help to keep
these plants warm. Photo by Terrie Schweitzer,
via flickr.
[56]
This small hothouse
consists of straw bales and old windows.
Compost and natural fertilizer in the soil
additionally heat the soil [57]
6. Warm raised bed + greenhouse attachment
= super-raised bed greenhouse
You can build a warm permaculture raised bed (with wood,
compost, manure and leaves as layering) as a greenhouse -
with glass, plexiglas or fabric. So you can reach very
high temperatures and the plants germinate and grow in no
time:
Raised bed greenhouse 02 [18] - Raised bed greenhouse 03
[19]
Raised bed windscreen attachment [32] - raised bed
greenhouse 01 [17] - tomato raised bed greenhouse [21]
7. "Walipini" - the lowered greenhouse
(pit greenhouse) for ALL SEASONS
With a Walipini EVERYONE and EVERY LAND
can run their own agriculture all year long.
Half underground greenhouse in the high Andes in Bolivia,
Mother Earth always gives off heat (unfortunately this pit
greenhouse is with plastic foil tarpaulin as a roof) [43]
- Half underground pit greenhouse in Spetchley Gardens,
UK. Stairs go down to the entrance on the right. [44] -
There is missing a hail protection with chicken wire over
the roof.
The only big investment for a pit greenhouse is to build a
pit. Then almost everything goes by itself with Mother
Earth:
1. The microclimate in pits is stable because the
soil layer is reacting slowly to climate change:
Due to the thermal inertia, the deep soil is always
moderately warm in winter and moderately cool in summer,
because the soil layer takes several months to adapt to
the outside temperature.
2. 1.2m: The minimum depth of a pit
greenhouse is 1.2m.
3. Wall materials: Wall material may be:
earth, earth bricks, natural stones, earth bags, water
barrels.
4. The walls become a heating battery: the
walls store the heat and radiate the heat during the
night, therefore it's never too cold during the night, in
other words: the earth walls work like a battery and give
off the warmth during the night.
5. Heating from 5 sides: there are 4 heated walls
and the heated floor during the night: The
heating during the night comes from 5 warm sides: 4 warm
walls and the warm floor - in a normal greenhouse there is
only 1 warm side: the floor.
6. Heating with water barrels at the back side:
This is the best heating method in a Walipini greenhouse
because water stores warmth the longest and radiates it
the longest during the night, but the water barrels need
more space.
7. Watering with rainwater in water barrels:
rainwater can be collected in the water barrels.
8. Watering of plants with rainwater: When
the water barrels are full one can install an additional
water tank for watering the plants with living water.
9. Build 1m above the groundwater level:
Pit greenhouses must be built at least 1 m above the
groundwater level, otherwise a major water damage is
possible.
10. Window front greenhouse: window front towards
the sun: The window front of a window front
greenhouse must always be directed to the sunny side: In
the northern hemisphere, the window front is facing south,
and the back wall (north wall) takes most of the heat. In
the southern hemisphere, the windows face north and the
back wall (south wall) stores most of the heat.
11. Window front angle: The angle of the
main window side is optimal with a 90 degree angle to the
sun during the winter solstice - or the window side is
shaped in the shape of a half U, which corresponds to
every possible sun angle.
12. Small windows for ventilation: The
window front has small windows for ventilation
possibilities during summer times.
13. Window materials / transparent roofing
materials: Windows are made of glass or
plexiglass (four-layered polycarbonate sheets) with a
thickness of 7/8". The plexiglass is then bendable to form
half a U.
14. The tube pit house: The longer a pit
greenhouse is (a tube pit greenhouse), the warmer it will
be and the more stable the temperature is at night. At the
same time, a pit greenhouse must have no holes at night to
keep the cold air out.
15a. Roofs (transparent): may be in the
form of a V (glass, plexiglass) or in the form of a U
(plexiglass). Plastic wrap is TOXIC, releases microplastic
through weathering and is poisoning the air and
everything.
15b. Roofs (solid) can be a normal roof
combined with a window front to the sunny side, or the
roof can be on a mountainside the mountain itself combined
with a window front to the sunny side.
16. Plastic film / foil / wrap is poisonous
because the weathering causes microplastics to be released
into the air and the air and everything is poisoned.
17. Water circle, drainage, ventilation:
Everything must be watertight, there must be no holes in
the structure, there must be drainage, and for summer
there must be ventilation or windows to open.
18. Avoid hail damage with chicken wire:
Glass roofs can be protected with chicken wire. When the
roof is solid in combination with a windows front one can
attach a small "canopy" with chicken wire so there will
never be any hail damage.
Do not use plastic sheeting: do not use
plastic foil / film / wrap because weathering causes the
sheeting to constantly release microplastics into the air
and the air and all is poisoned. A plastic sheet is
weathering within in 3 to 4 years.
The pit
greenhouse / hothouse "Walipini", scheme
(pit greenhouse) [45]
The plants are protected and electricity is
saved. A A pit is installed (at least 1.2m),
the inner walls are covered with stone, clay
bricks or other natural material - dense
material that absorb heat and hold heat back.
The depth is between 1.2m (4ft) and 1.8m (6ft)
[depends on the height of the plants].
Water barrels filled with water can absorb
even more heat.
In case of instability, the wall can be
stabilized with pressed earth bricks.
The sun heats up the greenhouse through the
transparent roof. [Web12]
The best semi-submerged pit greenhouses are those
1) with a fixed roof,
2) with a window front on the sunny side and
3) with a solid wall on the shade side, where heat
is stored.
This avoids any hail damage. In addition, it is easy
to create permaculture raised beds and corridors.
The cold air is concentrated in the corridors at
night and you no longer have to bend down to the
ground.
Tube pit greenhouse of Roald Gundersen in
Wisconsin [49]
You can also create the pit deeper, so that only one
roof looks out:
Pit greenhouse "Walipini", here
a completely submerged greenhouse from Bolivia
with sun roof - cross section [58]
Such a sun roof must be made of fabric, glass or
plexiglass and needs hail protection with chicken
wire. Plastic foil releases microplastic into the
air.
At the pit greenhouse on the next photo there were
raised beds installed with a corridor in the center
(working as a cold air sink) where the colder air
will be during the night not harming the plants in
the raised beds and plants go on growing during the
night.
This pit greenhouse in
Patagonia (Argentina) has got walls of earth bags.
[47] -
The plastic foil must be replaced with glass or
plexiglass.
The slope pit greenhouse / Slope
greenhouse
A small slope pit greenhouse:
Walipini, sunken greenhouse on the mountainside
with window front to the sunny side [51]
On the mountain slope with an earth layer it's easy
to install warmth-storing earth walls, with raised
beds and with corridors as cold air sinks - and this
will be a tropical place.
Here is a scheme, the slope pit greenhouse by Mr.
Mike Oehler:
With a permaculture layering in the raised bed with
wood, manure, foliage and compost, the raised
planting bed becomes warm and moist. Watering is not
necessary and the plants are growing even faster.
Here is such a slope pit greenhouse (slope
greenhouse) on the hillside under construction:
A Walipini hothouse is
installed halfway in the hill,
Tennessee. This hothouse is built into a
hill [46]
A small slope pit
greenhouse: Walipini, sunken greenhouse
on the mountainside with window front to
the sunny side [51]
Greenhouse section in an earthship
The next pit greenhouse has a sun-window front and a fixed
roof. The roof is covered with black foil to keep it as
warm as possible. The film is problematic because it
releases microplastic into the air. Better is a solid roof
painted black. Metal roofs are also very hot. This house
on this photo here is the model of an earthship
with 1m thick earth walls made of old tires filled with
earth storing the heat combined with a greenouse section
on the window front.
Pit greenhouse with window wall to the sunny side and
spillway [48]
Small windows within the row of windows are open for
ventilation above all during summer times. As hail
protection, one can attach a protective grid with chicken
wire as a canopy.
Apparently, old tires were used here for the base of the
window wall where the planting beds of the greenhouse part
are. This is arquitecture by architect Michael Reynolds -
link.
Principally one can sink old railroad cars half in the
ground and then use them as greenhouses with a window
front to the sunny side and the other window front is
closed with an earth wall from outside.
The hail protection is also missing at the next pit
greenhouse:
Tube pit green house of Roald Gundersen in
Wisconson ("USA") [49]
Interior of the tube pit greenhouse of Roald
Gundersen in Wisconsin ("USA") [50]
This greenhouse is 2800 square feet (s.f.) - and is
insulated with straw bales. The support structure is made
of Robinia wood, grows fast, is robust, rot-proof and is
abundant in Wisconsin [web12].
The larger a pit greenhouse, the more efficient it is
because the temperatures in a small greenhouse change
faster [web12].
Added pit greenhouses attached to the
residential home
The adding of a pit greenhouse is also efficient because
the residential home is like an insulated body without
extreme cold nor extreme heat. One can increase the heat
painting the wall and the structures in a dark color or
even in black because with black color the walls and
structures are warming most. Combined with a permaculture
raised bed there can grow also tropical plants here.
Cultivated pit greenhouse
with a Plexiglas roof in the shape of a semi-U
by Rob Stout, Embudo,
New Mexico ("USA") [52]
Cultivated pit greenhouse in black as an
extension of a residential home being added to a
raw stone wall - this is very energy efficient
[53]
Hail protection with chicken wire against big hailstones
is missing.
The slope pit greenhouse with plexiglass
roof and water barrel heating on the shady back wall
The pit greenhouse in Bozeman (Montana) is built of wood
with a roof of plexiglass. It has a cold trench and a
water barrel heater on the back wall. Peppers, small
radishes, chard, coriander, basil and zucchini also grow
here in winter. Even at below 0ºC during the day (for
example, at 28º Fahrenheit, -2ºC), the temperature in the
greenhouse can rise to 47ºC (117ºF) if you forget to open
the doors (!). Water barrels on the back wall keep the
heat of the day and radiate the heat during the night. The
rainwater can be collected and used for watering, if you
want to pour. In permaculture raised beds with wood down
in there you do not have to water the plants more ...
Pit greenhouse in Bozeman, Montana (Canada) - interior
view with cold-air ditch and water barrel heater 1,2
[54]
Pit greenhouse in Bozeman in Montana (Canada) with cold
ditch with indentations for the accessibility of the
plants - here also pepper plants grow in winter when it
is below 0ºC outside [54]
8. Greenhouses made of plastic film /
sheet / wrap or PET plastic bottles release microplastic
into the air - very toxic - must be forbidden!
A plastic sheet will be destroyed by weathering in about 4
years, and a PET bottle will be destroyed by weathering in
10 to 20 years. This is why it is not a good idea to use
plastic films or PET bottles for building houses, because
the weathering caused by the temperature differences of
day and night destroys the plastic films and PET bottles
and thus releases microplastics into the air.
This air is absorbed by the plants, so that the
microplastic also gets into the plants. Greenhouses must
therefore be made of glass, plexiglass or fabrics.
Plastic
greenhouses (plastic film / sheet / wrap or
PET bottles, etc.) contaminate the air with
microplastic - must be forbidden!
Mini greenhouse with wooden
frame and plastic wrap [24] is highly toxic
because the plastic wrap constantly releases
microplastic into the air contaminating
EVERYTHING IN THERE
Greenhouses made of PET
bottles [27] are highly toxic because the PET
bottles (plastic bottles) constantly release
microplastics into the air and contaminate the
air contaminating EVERYTHING IN THERE
[1] Toilet rolls for seedlings:
https://www.pinterest.de/pin/450571137705215517/
[2] Seedlings grown in toilet rolls:
https://www.pinterest.de/pin/450571137705215517/activity/tried
[3] Seedlings grow in egg cartons:
https://www.pinterest.de/pin/400820435580282187/
[4] Seedlings grow in eggshells:
https://www.pinterest.de/pin/570479477780222321/
[5] Seedlings germinate in toilet rolls:
https://www.nafeusemagazine.com/15-astuces-pratiques-et-economiques-pour-vous-faciliter-la-vie-au-jardin_a1310.html
[6] Cover seedling with transparent PET bottle 01:
https://www.nafeusemagazine.com/15-astuces-pratiques-et-economiques-pour-vous-faciliter-la-vie-au-jardin_a1310.html
[7] Cover seedling with transparent PET bottle 02:
https://www.nafeusemagazine.com/15-astuces-pratiques-et-economiques-pour-vous-faciliter-la-vie-au-jardin_a1310.html
[8] Cover seedling with white-transparent plastic bottle:
https://www.nafeusemagazine.com/15-astuces-pratiques-et-economiques-pour-vous-faciliter-la-vie-au-jardin_a1310.html
[9] Mini greenhouses made of old windows:
https://www.nafeusemagazine.com/15-astuces-pratiques-et-economiques-pour-vous-faciliter-la-vie-au-jardin_a1310.html
[10] Fold toilet rolls and put them in egg cartons:
https://www.pinterest.de/pin/310326230556451966/
[11] Toilet rolls in earth-filled tupper:
https://www.pinterest.de/pin/525162006522450181/
[12] Seedling beds covered with jute:
https://permaculturenews.org/2011/04/11/spring-permaculture-tips-and-tricks/
[13] Seedling beds made of old windows inclined:
https://www.pinterest.de/pin/117304765281129348/
[14] Seedling bed hinged with tarpaulin:
https://www.pinterest.de/pin/393994667398069453/
[15] Seedlings can be stacked in the glass cabinet:
https://www.britishgarden.eu/de/pflanzzubehoer/anzucht/gewaechshaeuser-glocken-udgl/
[16] Victorian bell for seedlings:
https://www.britishgarden.eu/de/pflanzzubehoer/anzucht/gewaechshaeuser-glocken-udgl/
[17] Raised bed greenhouse 01:
https://www.pinterest.de/pin/668432769668977814/
[18] Raised bed greenhouse 02:
https://www.pinterest.de/pin/598978819164985959/, video 1'45
''
[19] Raised bed greenhouse 03:
https://www.pinterest.de/pin/598978819164985959/, video 2'21
''
[20] Raised bed greenhouse 04 with transparent roll roof:
https://www.pinterest.de/pin/797418677741627558/
[21] Tomato raised bed greenhouse:
https://www.pinterest.de/pin/660621839066076803/
[22] Hinged greenhouse on house wall:
https://www.pinterest.de/pin/742179213565793576/
[23] Greenhouse tomatoes in transparent plastic bags on a
wooden wall:
https://www.pinterest.de/pin/356980707955148544/
[24] Mini greenhouse with wooden frames and foils:
https://www.pinterest.de/pin/352758583308988320/
[25] Mini greenhouse made of PET bottles:
http://www.livinggreenandfrugally.com/build-a-green-house-from-plastic-bottles/?utm_content=buffer3741a&utm_medium=social&utm_source=pinterest.com&utm_campaign=buffer
[26] PET bottles put together:
https://www.pinterest.de/pin/472596554623667009/
[27] PET bottle greenhouses:
https://www.pinterest.de/pin/450148925251432200/
[28] PET bottle greenhouse under construction:
https://www.pinterest.de/pin/303852306091755123/
[29] PET bottle greenhouse with bamboo sticks:
https://www.pinterest.de/pin/50384089561194878/
[30] Mini greenhouses with foil and fabric:
https://www.pinterest.de/pin/425590233518319749/
[31] Mini greenhouse attached to a house wall:
https://www.pinterest.de/pin/377739487487472858/
[32] Raised bed with windscreen attachment of tissue:
https://www.pinterest.de/pin/261419953348376793/
[33] Stack greenhouse to seedlings:
https://www.pinterest.de/pin/514395588669413130/
[34] Greenhouse made of old windows:
https://www.pinterest.de/pin/434667801507716926/
[35] Polygon greenhouse with foil:
https://www.pinterest.de/pin/857795060253109149/
[36] Mobile mini-greenhouse for seedlings 01:
https://www.pinterest.de/pin/467811480027573851/
[37] Old bus as a greenhouse:
https://www.pinterest.de/pin/453315518718391557/
[38] Old bus as a greenhouse, interior view:
https://www.pinterest.de/pin/440930619739793700/
[39] Mini greenhouse to stack seedlings:
https://www.pinterest.de/pin/316518680054145134/
[40] Mini greenhouse to stack seedlings:
https://www.pinterest.de/pin/555561304018674401/
[41] Mini greenhouse on a rear window in the car, drawing:
https://www.pinterest.de/pin/506373551828776382/
[42] Mobile mini greenhouse for seedlings 02:
https://www.pinterest.de/pin/160792649180440017/
[43] Lowered pit greenhouse "Walipini" in Bolivia:
https://twitter.com/adapt2030?lang=es
[44] Semi-underground pit greenhouse at Spetchley Gardens,
UK: Mezzapod via Flickr
[45] Lowered pit greenhouse, scheme:
https://insteading.com/blog/underground-greenhouse/
[46] Pit greenhouse on hillside with stone walls:
https://www.wind-sun.com/ForumVB/showthread.php?13486-Heating-my-greenhouse
[47] Pit greenhouse in Argentina with earth bags as walls:
https://ourlittlething.ning.com/profiles/blogs/unique-earthbag-green-house-built-to-withstand-the-patagonian?xg_source=activity
[48] Pit greenhouse with hard roof and window front:
https://www.darfieldearthship.com/
[49] Pit greenhouse with hard roof and window front by Roald
Gundersen in Wisconsin:
https://www.pinterest.com/pin/370139663096195555/
[50] Pit greenhouse with hard roof and window front in
Wisconsin, interior view:
https://insteading.com/blog/underground-greenhouse/
[51] Pit greenhouse on the hillside:
https://greenhouseglimpses.blogspot.com/2009/02/greenhouse-design.html
[52] Attached pit greenhouse with curved plexiglass roof at
residential home, Embudo, New Mexico:
https://insteading.com/blog/underground-greenhouse/ -
http://lloydkahn-ongoing.blogspot.pe/2011/02/adobepolycarbonate-greenhouse
-in-new.html
[53] Attached pit greenhouse in black with windows:
https://insteading.com/blog/underground-greenhouse/
[54] Video: Pit greenhouse with water barrel heating on the
shadow wall - Bozeman Montana - 2012 (2'17 ''):
https://www.youtube.com/watch?v=w1Aoj0QXrLM
[55] Embankment greenhouse (slope greenhouse) by Mike
Oehler:
https://www.motherearthnews.com/organic-gardening/earth-sheltered-greenhouse-zmaz04fmzsel#axzz2O1cp2UN1
[56] Straw ball greenhouse for seedlings:
https://www.flickr.com/photos/terriem/2689356404/
[57] Straw ball greenhouse for seedlings with warm compost
inside and glass on the top:
https://insteading.com/blog/underground-greenhouse/
[58] Video: WALIPINI EN ALTIPLANO BOLIVIANO:
https://www.youtube.com/watch?v=YN722I2eg7Q
[59] Automatic irrigation with kettle and trimmed shoelaces:
Photo by Michael Palomino 2018
Stack mini greenhouse to seedlings [40] - It must NOT be plastic because plastic releases microplastic into the air and poisons the air.
