Polycarbonate greenhouse: design options and DIY construction

Greenhouses and other structures using polycarbonate are today popular among summer residents and owners of private houses. Polycarbonate is a relatively new inexpensive material that has a lot of advantages, which is why a do-it-yourself polycarbonate greenhouse is the best choice for many. It is quite possible to build it yourself, to maintain it is simple, and to grow crops in it is a pleasure. Today, many strive to grow vegetables on their own, fearing GMOs, and any rather advanced owner of a summer cottage is always proud of his harvest and happily works in a greenhouse.

Why polycarbonate?

If we compare polycarbonate with other types of plastic, it is inexpensive, but it looks very attractive and modern. That is, in addition to functionality, the greenhouse will also be an aesthetically attractive object on the site.

Polycarbonate is a modern material and, like most modern materials, it has an aesthetic appeal. Such a greenhouse, in addition to its direct purpose, will look good on the site.

The material has good light scattering ability, high degree of thermal insulation. Resistance to wind and snow loads, impact resistance, immunity to ultraviolet radiation are also considerable advantages of polycarbonate.

It is convenient to build homemade polycarbonate greenhouses by purchasing ready-made arched kits. Before starting construction, calculate the size of the future greenhouse, taking into account the size of the polycarbonate elements, taking into account these parameters, you will need to equip a simple foundation and basement.

The most common size of a polycarbonate sheet is 2.1 / 6 m. When the sheets are bent, an arc with a radius of about 2 m is obtained, the height of the greenhouse will be the same, and the width will be about 4 meters. To create a typical greenhouse, 3 sheets are enough, its length will be 6 m on average. If you wish, you can slightly reduce the size of the greenhouse, or increase it by adding another sheet. And if you need to increase the height of the structure, the base can be raised to the plinth. The most convenient for a greenhouse is a width of 2.5 m. This size allows you to place two beds inside and make a fairly spacious passage between them, where you can even transport a cart.

Important! Polycarbonate is a transparent material, in order to keep the flow of light inside the structure and direct it to the beds, not allowing it to scatter, it will be appropriate to use a special composition with reflective properties to cover the walls.

When building a greenhouse from polycarbonate sheets, we advise you to choose a shape where flat areas alternate with arched ones, because on flat areas, the effect of reflection of sunlight is minimized, there will be less glare and the light will give its heat to the plants, and not scatter, which is typical for an arched structure. With a competent combination of curved and flat elements of the greenhouse, an effect can be achieved when the coefficient of absorption of heat and light is close to optimal.

Features of the manufacture of greenhouses:

  • the space inside must be organized in an optimal way;
  • polycarbonate sheets must be used expediently so that the amount of waste is minimal;
  • the foundation and plinth are constructed taking into account the selected dimensions;
  • the climate in the greenhouse is humid and warm, based on this, it is necessary to select the material for the frame - the most convenient is a galvanized profile; when choosing wood, it must be pretreated with special solutions - copper sulfate, antiseptics.

Tools and materials required for work:

  • cellular polycarbonate (thickness 4-6 mm);
  • frame materials (steel pipes, wood or galvanized profile to choose from);
  • jigsaw, screwdriver, drills (4 mm), self-tapping screws for polycarbonate (for a metal frame - with a drill).

You can learn how to choose a good electric jigsaw from the material: https://diz-cafe.com/tech/kak-vybrat-elektricheskij-lobzik.html

What is the best foundation?

The greenhouse should be located on a level, well-lit place. The best location in length is from east to west. There are several options for arranging the foundation for it.

It happens that the place for the greenhouse is located only on an area with an uneven surface - in this case, you can use additional beams or other material to level the soil, then fill up more earth, tamp until the surface is level

If you are satisfied with the wooden version of the polycarbonate greenhouse foundation, which has a short service life - up to five years, the vertical supports should simply be immersed in the soil, you can fasten them to steel corners driven into the ground. A beam of 100/100 mm in size is used, it is mounted around the perimeter of the greenhouse. But such a foundation, even if the tree is treated with antiseptics, will not last long.

To create a more practical foundation, curb stones, blocks of foam or aerated concrete, bricks are used. If the soil in the area allocated for the greenhouse is loose, the masonry is done around the entire perimeter. If it is dense, you can limit yourself to individual posts, which are set according to the level.

The most expensive, but also the most durable will be a monolithic reinforced concrete foundation made around the perimeter of the greenhouse. To install it, you need to dig a trench, mount a reinforcing cage and start concreting. The design will avoid repairs, will be stable, problems such as distortions will simply not arise.

Types of frame structures

Consider the three most convenient options for a greenhouse frame for polycarbonate.

Option # 1 - arched frame for the greenhouse

This option looks the most attractive and is used by summer residents more often than others. It is convenient because in winter the snow on the roof will not linger, the load-bearing elements will be relieved of overload, the load on the foundation will also decrease. When choosing a standard sheet with a length of 6 meters, the width of the greenhouse will be 3.8 m, height - almost 2 m.

Ventilation for the greenhouse is necessary, therefore, in addition to the door, it is advisable to also make a window. This greenhouse has three vents - two on the side and one on the top.

Scheme of the construction of a greenhouse with an arched frame. For cladding, you can use a roll of film in two layers or sheets of polycarbonate, which will be a more practical option.

The material on how you can reduce the heat in a greenhouse made of cellular polycarbonate will also be useful: https://diz-cafe.com/vopros-otvet/teplicy-i-parniki/kak-snizit-zharu-v-teplice.html

Option # 2 - a frame in the shape of a house

It is a structure with a gable roof and vertical walls. If you choose this cellular polycarbonate greenhouse frame, the greenhouse can be made in any size, but you will need more material.

Such a greenhouse with a frame in the shape of a house transmits light and heat well, roof hatches perform the function of ventilation - all conditions have been created for good growth of seedlings and vegetables

The choice of materials for creating a skeleton

Wood is a popular material for building an inexpensive greenhouse. But its significant drawback is its fragility and the need for constant repair. Wood is not often used to create a polycarbonate greenhouse.

Such a lean-to greenhouse is ideal for a small plot, you can build it, even if you have a plot of 6 acres, placing it in a convenient corner

The frame is welded from a steel pipe - square galvanized pipes with a size of 20/20/2 mm are used. If installed correctly, such a frame will last a long time. When choosing an arched shape for bending pipes, you will need a special machine, you also need to be able to work with a welding machine. Today it is possible to order bent pipes in special organizations.

An omega-shaped galvanized profile is a very good option, it is quite simple to install, and the structure will be durable and lightweight. But the profile for the arch needs to be bent and many bolt holes made in it.

And also, from polycarbonate, you can build an original greenhouse in the form of a geodesic dome. Read about it: https://diz-cafe.com/postroiki/geodezicheskij-kupol-svoimi-rukami.html#i-3

Example: building a greenhouse with a pipe foundation

We make markings with rope and pegs. Then, using a garden drill, we make four holes along the length (depth - 1.2 m), and a couple of holes for installing the door - at a distance of its width. Asbestos-cement pipes are cut into pieces (length 1.3 m), in a vertical position they are installed in holes in the ground. Pour sand into the gap, ram it well.

The bars are cut into pieces one and a half meters long. One end of each piece must be cut off with an ax so that its diameter is equal to the diameter of the pipes. The pillars impregnated with a protective compound are vertically installed in the pipes, we make a frame of boards, which will fasten the pillars in the lower part.

The rafter frame is cut for the roof, so that it is more durable, it should be covered with a protective impregnation. To fasten the pillars at the base of the greenhouse, we nail the lower strapping - galvanized iron strips 25 cm wide. For cutting, you can use metal scissors. The ribbons should overlap each other by 5 cm.

Now you can start wall cladding with polycarbonate. We drill holes in the sheets, cut the sheets with a sharp knife taking into account the size of the roof, screw them to the rafters with self-tapping screws

Metal bands are also needed for the roof, but they will be 15 cm wide to create a ridge. The tapes are bent at an angle of 120 degrees with a mallet, leave a small gap between the sheets taking into account their thermal expansion, the gaps can be closed with tape so that the thermal insulation does not suffer.

The next step is to sew up the walls with polycarbonate, leaving the openings for the door open. A greenhouse with straight walls for insulation can eventually be sheathed with another layer of polycarbonate.

The drawing gives an idea of ​​how to build a stable, practical greenhouse with intermediate uprights and a gable roof.

We cut the boards prepared for the door in half with a saw, make doors and fasten hinges to them. We put the door frame on a polycarbonate sheet, cut the material according to its size with a knife and fasten the sheet to the doors. The doors are ready, you can hang them, put handles and locks if you plan. The polycarbonate greenhouse has been built, the ground around it needs to be leveled and the interior arrangement must be started.

You can learn how to equip a drip irrigation system in a greenhouse from the material: https://diz-cafe.com/tech/sistema-kapelnogo-poliva-v-teplice.html

A few important building tips:

  • when using a non-galvanized profile, paint it so that it does not rust;
  • there must be good ventilation in the greenhouse, therefore, in addition to the front door, it does not interfere with making a window on the opposite side of the structure;
  • the minimum width of the greenhouse for comfortable operation is 2.5 m (space for a meter-long passage and two beds of 0.8 m each);
  • to illuminate the greenhouse, it is convenient to use energy-saving lamps that give white light;
  • if you plan to use heating, an electric heater, hot water heating, potbelly stove or heat generator will do, depending on the circumstances.

To create such a greenhouse does not take a lot of time and large costs for materials. But it will serve you for a long time and will be an excellent help in gardening, and fresh products grown on your own, or seedlings to decorate the garden, will delight and cheer you up.

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DIY polycarbonate frame greenhouse

Many gardeners, when running a home garden, faced the need to equip a stationary or collapsible greenhouse, which would allow them to grow various heat-loving crops and improve the yield of vegetables and fruits. Experienced gardeners recommend paying attention to polycarbonate greenhouses, which are reliable, durable and easy to use. It will not be difficult to complete such a greenhouse, so every summer resident and gardener will be able to cope with this work.


If you are wondering whether or not you need a polycarbonate greenhouse foundation, there is only one answer - you need it. And reliable. They fly very well. Therefore, the base must "anchor" the building well.

For normal operation, it is better to put a polycarbonate greenhouse on a foundation.

Belt type

This foundation is for buildings that are planned for more than one year. The most expensive, but also the most thorough option. If you plan to use the greenhouse all year round, the foundation is made deepened - to a depth just below the freezing of the soil. For seasonal use, concrete-brick or simply from a bar is suitable.

Concrete-brick is one of the most common

Concrete-brick (concrete-lumber)

Most often they make a concrete-brick version. It is optimal in terms of costs, complexity and duration. The work is carried out as follows:

  • They dig a trench according to the size of the greenhouse. Its width is about 20 cm, the depth depends on the type of soil.
    • On heaving soils (clay, loam, black soil), a trench is dug up to a depth of 50-60 cm. The edges of the trench are reinforced with formwork - hammered boards made of boards, plywood, OSB. On the leveled bottom, 15 cm of coarse and fine crushed stone is poured, rammed. The same layer of sand is poured on top, leveled and tamped. This pillow will compensate for ground movements during frost heaving.
    • The depth of the foundation on soils not prone to heaving is 25-30 cm. The bottom of the dug trench is cleaned of stones, roots and other objects, leveled and compacted.

    The markup is carried out as follows

  • A dense oilcloth or roofing felt is spread on the prepared bottom. This is necessary so that moisture from the solution is not absorbed into the soil. It is also desirable to cover the sides, but there formwork panels partially solve this problem. Without this layer, concrete will not gain strength and will collapse.
  • A solution is poured into the resulting ditch. The proportions are as follows: for 1 part of cement (M 400), take 3 parts of sand and 5 parts of aggregate. Aggregate - preferably fine and medium crushed stone. It is not worth using expanded clay - it absorbs moisture and can cause high humidity.
  • The surface is leveled "under the level". You can smooth it down with a wooden block.

    Construction of a concrete-brick foundation

  • In the foundation, at the corners and with a distance of 1 meter, embedded inserts are installed - studs or pieces of reinforcement with a diameter of at least 12 mm. Studs are placed if it will be necessary to attach a beam to them, reinforcement - if a brick will be laid. They stick out above the level of the foundation by at least 15 cm.
  • The poured foundation is covered with a film, it stands for at least a week (at temperatures below 17 ° C, two weeks should pass). If the weather is hot, it is watered a couple of times a day. To preserve moisture in this case, it is better to cover it with a coarse cloth (burlap) under the film.
  • If the lower strapping is a timber, waterproofing is rolled out over the concrete base. It is possible - roofing material in two layers, but now it is quickly destroyed, so it is better to take "Hydroizol" or something similar. You can coat the concrete with bitumen mastic a couple of times. The result will be more reliable.
  • A number of strapping is laid:
    • If it is a 100 * 100 bar, it is impregnated with a compound for direct contact with the ground. They drill holes in it for the installed studs, put them on them, tighten the studs with bolts. To prevent the bolts from sticking out, recesses are made using a drill of a suitable size.

    Brick laid on concrete

  • If the base is concrete-brick, one or two rows of bricks are laid. You can also use hollow, since the mass is small. The masonry is carried out so that the mortgages fall into the seam between the bricks.
  • Next comes the assembly of the frame.
  • There are options for this type of foundation. It is possible to install small-sized foundation concrete blocks in the prepared trench, fill the space between them with mortar. They must be installed so that their edge is below ground level. A layer of concrete is poured on top, leveled. The embeds are fixed at the seams.

    Empty bottles can be used as a building material. They are laid in rows, poured with concrete. It turns out a very economical and warm foundation. Its bearing capacity is quite enough for a more serious building.

    Polycarbonate greenhouse lumber foundation

    This option is suitable as a temporary solution - it can last two to three years. It depends on the humidity in the area, the quality of the wood and the processing. A beam is used with a large section - 100 * 100 or more (it can be made composite, from several boards). It is treated with compounds for wood in contact with the ground. The order of work is as follows:

    • They mark the site, dig a trench. Its dimensions should be 7-10 cm deeper and wider than the used timber.
    • The bottom and walls are covered with rolled waterproofing material (it is better to use "Gidroizol", it will last for a longer period).
    • They lay the processed timber, connect it in the corners.

    It is easy to make a log strip foundation for a polycarbonate greenhouse with your own hands, but it will not last long

  • The waterproofing is wrapped around the timber.
  • With the help of corners driven in on both sides, the timber is fixed in place.
  • The free space remaining between the waterproofing and the walls of the trench is covered with crushed stone if the soil is heaving and previously removed earth, if not. The soil is well compacted.
  • Further, a strapping bar is attached to this bar. Another layer of waterproofing should be laid between them.
  • This option is only suitable for dry areas with low groundwater levels. In this case, one can hope that the foundation will live for at least a few years.


    Another type of foundation that will not protect against frost. But it is reliable and will serve for a long time. Read a full description of the technology for manufacturing a pile-grillage foundation here, and we will give a short list of works.

    • They mark the perimeter of the greenhouse, dig a trench 20 centimeters wide and about the same depth.
    • In the corners, holes are drilled with a diameter of 30-40 cm and a depth below the depths of soil freezing (use a drill). Then the same holes are drilled along the perimeter. The distance between them should be somewhere 2-2.5 meters.
    • Sand is poured into the holes - in a bucket, approximately, then roofing material rolled into cylinders is placed inside.
    • They are equipped with three rods of reinforcement with a diameter of 10-12 mm, connected into a single structure. The rods should stick out above the ground - the harness will be attached to them later.
    • Concrete is poured into the holes (1 part of cement M 400, 3 parts of sand, 5 parts of crushed stone). It is necessary to ensure that there are no voids.
    • At the bottom of the trench, a layer of sand, 5-5 cm thick, is poured, it is leveled and rammed.

    Pile-grillage foundation - a reliable option for a do-it-yourself polycarbonate greenhouse

  • Waterproofing (roofing material, Gidroizol) is spread on it.
  • Formwork is assembled on the sides, fixed. It may be above ground level. If the soil is not free-flowing, you can do without formwork by covering the walls with waterproofing. But in this case, the foundation will be level with the ground, and it will also be uneven.
  • Concrete of the same composition is poured into the formwork as for the pillars. The surface is leveled, covered with a film, concrete is waiting for the setting.
  • Then you can fix the harness, or you can build on a couple of rows of bricks and only then install the frame. After that, we can say that the do-it-yourself polycarbonate greenhouse is almost ready. It remains to fix the polycarbonate.

    DIY greenhouses and greenhouses made of polycarbonate

    Every summer resident was faced with a situation when the May warmth and the bright sun, heating the garden with tender first shoots, is replaced by snow the next day. The situation is unpleasant, but completely solvable - a polycarbonate greenhouse, installed on the site with its own hands, will help protect the seedlings.

    There are many original building ideas, but the most popular was the homemade polycarbonate greenhouse. The stores offer durable, reliable and very beautiful models of all sizes and shapes.

    However, a self-respecting gardener prefers to save money and build a greenhouse with his own hands from polycarbonate.

    Do-it-yourself competent choice of the design of the correct polycarbonate greenhouse

    When the owner of the dacha decided to start building a greenhouse from cellular polycarbonate with his own hands, he can choose the most daring form of construction. Bending material allows you to install any, even curved, roof and arched supports.

    DIY polycarbonate greenhouses

    The most popular among gardeners are the arched and hipped forms of greenhouses. However, you can find a variety of types of structures that differ from each other in the shape of the roof.

    An arched greenhouse with a semicircular roof is a kind of tunnel with polycarbonate walls. This material is ideal for an arched greenhouse because it can be easily bent into a smooth arc. The arch design has become popular because it retains heat well inside.

    The hipped greenhouse up to 2.5 meters high is made of blocks and has a gable roof.

    • polycarbonate greenhouse
    • The greenhouse structure can be equipped with removable transparent shields, which will open in warm weather, and when it gets colder, they can be installed in place, protecting the plants. You can make a polycarbonate greenhouse with your own hands with a closing lid:
    • For any chosen design option, you need:
    • end up with a durable and functional greenhouse,
    • provide free access to each plant.

    To get an original polygonal structure, the builder gives a domed shape to a homemade polycarbonate greenhouse with his own hands. The laborious process of manufacturing the structure includes complex sheathing of the frame with transparent sheets.

    The number of polycarbonate sheets and the level of technical complexity of the project depends on the selected type of structure. The next steps will be the selection of the localization site, the calculation of the amount of material and the correct distribution of the internal space.

    Choosing a place for building a polycarbonate greenhouse with your own hands

    The relatively dry and even soil of the selected site should not contain clay, which retains water on the surface, preventing it from penetrating to the roots of plants.

    Sandy soil is considered an ideal base for planting. In the absence of sand on the site, you will have to dig a pit, fill it with sandy gravel, close it with a sandy "pillow" and cover it with a layer of fertile soil.

    It is important to understand how to make your own polycarbonate greenhouse so that it not only saves money, but also makes a profit. To do this, the structure must be positioned so that a sufficient amount of sun penetrates the greenhouse. Then the owner of the cottage can save a lot on lighting and heating.

    A good way to build a polycarbonate greenhouse is to install it from north to south or from east to west, when the vegetation will be in natural light all day.

    The choice of the type of polycarbonate for the installation of the greenhouse

    For modern craftsmen, the manufacture of polycarbonate greenhouses does not seem to be an impossible task, since the market offers transparent material in different versions. The main thing is to choose the products of the most suitable quality in order to get a good harvest:

    • Under the guise of branded goods, you can buy low-quality polycarbonate.
    • Lightweight polycarbonate with thin walls is inappropriate to use in the northern regions for a polycarbonate greenhouse; your wrong actions can spoil the expected result. From sudden temperature changes, the material will become brittle and will not be able to provide the required strength to the greenhouse.
    • The characteristics indicated on the packaging of the sheets may not correspond to the real parameters at all. Instead of the declared thickness of 4 mm, you can get an impractical 3.5 mm sheet.
    • Weight plays an important role in the construction of a polycarbonate greenhouse with your own hands. A normal sheet weighs about 10 kg, and a lightweight sheet weighs up to 8.5 kg.
    • The packaging of high-quality material is marked with the methods and methods of its packing.
    • Lightness and elasticity speaks of the reliability of the future construction of a polycarbonate greenhouse with your own hands.
    • Film protection against ultraviolet rays is applied during the production of carbonate in the factory.

    Before the purchase, the seller must, at the buyer's request, provide a quality certificate and a passport indicating the dimensions, weight, manufacturer and other information about the product.

    If polycarbonate is sold in polyethylene packaging, it was manufactured at the factory.

    On the edge and on the UV-protected side of the sheet, you need to find the appropriate marking, without which you should not purchase products.

    The choice of material for a summer cottage

    To make a polycarbonate greenhouse, honeycomb plastic is usually chosen, which is transparent and allows almost 90% of sunlight to pass through. This indicator does not decrease during operation. The impact strength of glass is ten times lower, so you can build a polycarbonate greenhouse with your own hands and not worry about regular replacement of elements.

    Other attractive features of cellular polycarbonate that users choose it for include:

    • thermal conductivity of the sheet, 2 times higher than that of glass, with energy savings,
    • ease of installation - a polycarbonate greenhouse with your own hands can be given the desired shape,
    • high level of thermal insulation due to the air gap,
    • self-extinguishing and fire resistance,
    • resistance to the destructive action of atmospheric phenomena.

    The manufacturer recommends both operating and building a polycarbonate greenhouse with your own hands at -40 ° C - + 120 ° C, then the material will not lose its original properties.

    The choice of polycarbonate thickness depends on the complexity of the design and on whether you will have to build a small or large polycarbonate greenhouse with your own hands. The thinner the material, the less you can step in the crate. 8 mm is the optimal plastic thickness for a polycarbonate greenhouse with your own hands, drawings for construction are performed taking into account this parameter.

    The thinnest material attracts with its cheapness. However, it will turn out to be a small polycarbonate greenhouse; you will have to perform a small step of the crate with your own hands to preserve the shock resistance of the structure.

    When choosing the thickness of the polycarbonate sheet, you need to adhere to the following rules:

    • 4 mm - for greenhouses,
    • 6 mm - for a small greenhouse,
    • 8 mm - for a medium-sized greenhouse,
    • 10 mm - for tall greenhouses,
    • 16 mm - for a structure with large spans.

    The density of the plastic used for the greenhouse cannot be less than 800 g / m2. If the sheets lying in a pile do not have distortions, bends and other deformations, polycarbonate has a normal density. But it will be more reliable to study the documentation, which indicates the technical characteristics of the product.

    What to make a greenhouse with your own hands - polycarbonate or its analogues? Unlike usual and traditional materials, a polycarbonate greenhouse is durable in any climate, protects plants from the scorching sun, and keeps warmth. The plastic is easy to drill and bend after heating. Installation of a polycarbonate greenhouse with a drawing will cost much less than a glass structure.

    How to make a standard size polycarbonate greenhouse?

    Choosing the type of foundation

    In the regions of the northernmost latitudes, you cannot do without building a foundation. The greenhouse frame for polycarbonate is installed on a flat and well-lit place. If it is possible to position the structure from west to east, it will be illuminated by the sun all day.

    For a polycarbonate greenhouse with your own hands, drawings and step-by-step instructions provide for the use of any type of base.

    You can combine it from different materials, build a small wooden foundation or install a bulky reinforced concrete structure.

    There is another option: pour concrete around the perimeter, on which the frame will stand, and cover the space with wooden planks.

    The choice of the type of foundation depends on the quality of the soil:

    • for loose soil, concrete masonry can be made around the perimeter,
    • for dense soil that is difficult to process, a columnar base is ideal.

    It is not surprising that a monolithic reinforced concrete foundation is considered the best and most durable base for a homemade frame. But such a structure will cost several times more.

    Preparation of materials

    If the length of the purchased profiles is not enough, you will have to use building techniques, using different types of fasteners:

    • adhesive bonding of elements,
    • screw extension, with overlapping the ends of two elements, drilling several holes and bolting,
    • welded connection of pipe ends or profiles.

    To prevent the sheets from cracking, when joining them, the overlap should be at least 5 cm. Holes are drilled in several places and connected with screws with laying a metal tape.

    The diagram shows a structure with approximate dimensions, by which it is easy to understand how to build a polycarbonate greenhouse.

    The cost-effectiveness and speed of building a polycarbonate greenhouse with your own hands is confirmed by the photo of the structure: a little material is required, and the planned height allows you to install the beds on several levels. For walls and a roof of a 6x4 m structure, 6-7 standard sheets will be required. One of them will serve to fill the end spaces between the wall and the roof.

    1. On the independent construction of a polycarbonate greenhouse with your own hands, the videos confirm that the existing drawing is easy to change in accordance with the size of the site and make changes to the dimensions of the end planes.
    2. How to build a polycarbonate greenhouse with your own hands, the video clip tells interesting and detailed:

    Watch the video: Ten things you must do if you get a polycarbonate greenhouse. This advise is bourn of experience.

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