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To invent its garden
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 To organize your garden with vegetable and mineral élèments
Vegetable design - Organization of events for the Professionals and the Companies
Design of works for events, demonstrations attracting of the public. The idea is based on an analysis of the context, effects desired and means for the implementation of the vegetable composition.
Parks and public spaces - for the communities and managers of open fields. The creation of these spaces follows a step of landscape design. The project includes/understands preliminary analyses, the principal idea or the théme chosen, the documents and technical plans as well as the follow-up of building site. For existing spaces, instead of remaking, one can lay down emergency regulations and a regular follow-up for the improvement of the site.
Historical gardens - for the private individuals and communities. The parks and the gardens old or historical reflect a whole of exchanges and actions in the same will with a future
Plans, drawings and simulations photographs of gardens and parks, computer-assisted
The Councils with the private individuals, companies, trade and communities for the landscaping, gardens and space-green
Restoration, rehabilitation and installation of public gardens, gardens and parks old, Control of work for creation and the maintenance of various landscape installations.
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cold plants résitant:
Rusticity
It is initially advisable to define rusticity and freezing. Freezing is a fall in the temperature of the air in lower part of 0°C.
Rusticity is the faculty of the plants to be supported perfectly, a little or at all this fall in temperature. Certain tropical plants do not support that the temperatures go down in lower part from 10 or 12°C and die quickly without there being freezing in a strict sense term, while others tolerate temperatures of - 40°C.
That does not want to say only the plants which tolerate such temperatures are able to push in the Tropics.
Trachycarpus, a palm tree resistant to more - 20°C pushes badly in tropical climate for example and to make correctly push a lupin or a delphinium under a Mediterranean climate raises of the exploit, they are however two perfectly rustic species.
At all events, for each species described in this site, a zone of rusticity is quoted, that makes it possible to know where it is likely to push without too much risk to be destroyed by the cold
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 Cold, an evil for a good
All the gardeners pesté against the cold wave which one day made die their pink bay-tree or their preferred palm tree and yet the cold, certain plants cannot do some.
Vernalization, it is the name which one gives to this need for cold that certain plants have to be able to flower. The phenomenon is well-known and it is even reproduced artificially by certain horticulturists in order to obtain tulips flowered in December
Frosts: one distinguishes two types of cold:
Frosts of winter or frosts black
They is due on arrival of mass of cold air, it is often the brutal arrival of these masses of air which causes the most serious damage, i.e. the crystal formation of ice inside the cell even what entraine its death.
If the cold arrives in a progressive way, the plant will be put gradually in vegetative rest (it is what is called dormancy) and the cold will then have much less incidence. The cells are emptied partiellemnent of their water and the crystals of ice are formed at this time there in the intercellular meatuses (Space between the cells)
The fabrics of the plant resist this water loss and support the presence of the crystals in the meatuses. With the thaw, water is reabsorbed by the cells. A too fast thaw will also entrainera damage. An abrupt increase in the temperature is not desirable, it will thus be necessary to avoid the southern exposures full and is for the too frost susceptible plants.
Frosts of spring or hoar frosts
The hoar frosts are dangerous night coolings because they often occur when the vegetation already started. Several factors enter in account this phenomenon:
The absence of clouds. The losses of heat per radiation are maximum because not retained by the layer of clouds, a rather dense vegetable cover will be able to play the same part.
The wind is a weapon with double edge, if the garden concerned is in a basin where cold air heavier than the hot air, will stagnate, the wind will be used to evacuate the undesirable cold air.
Ventilation is besides a technique of fight against freezing in the cultures located in the small valleys. Elsewhere, it will be a disadvantage, cooling ground the less quickly than the air will tend to heat the air which is with its contact, the wind will expel this hot air to him to replace it by cold air.
The installation of hedges breezes winds directed according to the dominant winds will reduce considerably the harmful effects of the wind.
A ground tass and naked will reduce the effects of freezing while allowing the heat stored in the deep layers to go up. Mulching and the work of the ground are to be avoided in winter
The moisture of the ground supports the increase of the heat of the deep layers, it becomes a factor worsening of cold in the presence of wind which causes the evaporation of water then and thus consumes heat lowers the temperature. A good drainage of the ground is often preferable
The moisture of the air: one often intends to say that an important humidity of the atmosphere accentuates the effects of freezing, the water sprinkling on the plants indeed constitutes a method of fight against the cold (1 gram of water releases 80 calories while freezing)
This technique is employed in the orchards for example, its principle is to begin sprinkling as soon as the temperature goes down in lower part from 0° C and to stop only when the ice starts to melt. The ice then maintains the temperature of the plant with 0° C and thus prevents freezing.
This perfectly inapplicable method in a pleasure garden also has two other defects. It gorges the ground with water what, one saw it, is not inevitably desirable and can entrainer of the problems of asphixie racinaires.
It maintains the temperature of the plant with 0° C until the ice completely melted but the duration of the cold is a determining factor particularly at the plants whose rusticity is of a few degrees around zero for which one will have any interest so that the temperature does not remain too a long time around this value
The moisture of the air is in any event not a data which one can maitriser, there is thus nothing to utilize with share perhaps for certain succulent. The Sisal plant utahensis for example is however a plant which has a good cold resistance (Around - 20°C approximately) in desert conditions, but it well not easily acclimatizable in areas at the rainy winters.
The installation of a shelter to protect it from water (precipitations and condensation of water on the feuiilage) can be a solution to cultivate it
The exposure: as we saw previously, the cold air heavier than the hot air accumulates in the small valleys, these places are sometimes called the hollows with freezing. When the choice is possible, one will preferably plant the frost susceptible plants with hillside.
Duration of the cold and diurnal warming.
A plant does not die in a few seconds when the temperature master key admit - 4 with - 5°C. A one hour old point to - 5°C with a warming with + 10°C the day will absolutely not have the same consequences as two or three hours - 5°C with a diurnal warming with 0°C, it is obvious that in the first case the plant will be left there much better.
Period of plantation: if the autumn constitutes one period favourable with the plantations of good number of plants, spring remains preferable for the plantation of the species having a low rusticity so that they have time to be established and to be accustomed gradually to their new conditions
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Pour tous renseignements:
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To invent its garden
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