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Green Islands

In-Door Trees

An ideal Climate for "In-door Trees"

! No Problem !

So called "In-door Trees", i.e. living trees which are placed in entry areas, as decoration in shopping malls, with presentations and similar locations are usually stressed by a too dry and too warm environment. In spite of automatic watering systems which are usually provided they can very seldom live in a natural way.

A direct humidification of the crown area was until now quite a problem - on the one hand as the designing architects very much dislike piping being visible, on the other as the human visitors like their climate usually dryer than the plants.

So far there was no system available which united both requirements at a reasonable price.


picture: Berlin, Breitestraße,
German Chamber for Industry and Commerce, Giant Bamboo, 14m high

According to the needs of species, height or size of trees and groups of trees Plantfog offers several solutions to create a natural climate in the crown of the trees

  • For single trees and groups of green plants up to some 80m³ foliage volume our small systems "tropic" and "exotic-…" are suited best, because they can be mounted totally invisible while fulfilling all criteria of a species-specific treatment
  • For larger groups of trees with additional plants at soil level mid-pressure systems with a feeding pressure up to 35 bar are the best choice because the feeder lines - 6 mm 40-bar pressure hoses - can be hidden without problems with coco fibres or moss and the provided humidity volume can be adapted to all needs
  • For very large trees and large foliage volumes (for instance as in Berlin, shown above) we can provide special solutions based on our high pressure systems ( > 60 bar) which can be easily adapted to the needs and wishes of the designing architect

Some examples should illustrate our concept of foliage humidification:

Presentation Center of Schärf-Coffee-Machines - Neusiedl/Lake, Austria

Requirements: The two groups of coffee plants which have been arranged in the entrance hall in the form of a coffee bean should be humidified to their needs while the other areas of the entrance should remain dry. The installation should be as invisible as possible as the room is also used as a conference area.

Plantfog used two of its small 20-bar-systems "exotic-2" to solve the problem.

The pump modules were placed Invisible for visitors and soundless into sound-isolated, watertight stainless steel cases which are submerged in the floor.

In the left picture the steel case is still visible, the second case - opposite just across the path - is already covered with substrate. The picture on the right side shows the contents of the steel case with pump module and control box which allows an individual humidification profile.

Both systems are connected to a source of de-hardened tap-water which is led in from the general technics level.
From the pump modules high pressure PVC hoses are directed to standing tubes of stainless steel carrying the fogging nozzles.
The blow direction of the nozzles can be adapted individually so that the foliage can be humidified from below.

Result: Not only the requested humidity values for the coffee trees could be met - the trees showed a growth which surprised the managing garden architect.

International Orchid Show Luzern, Switzerland, March 2009

In a large, artificially lighted hall an artificial lake landscape was created which contained among other plants and orchids also a group of tree ferns.

Dicksonia antarctica
picture by
Tree Ferns Kleo Montforts

The requirement of the garden architect was the humidification of the tree ferns in a way that they would survive the 10 days of the exhibition in the rather dry and heated hall.
As tree ferns are adapted to cool and moist environments this was quite a challenge, moreover the installations should remain invisible to visitors and no pump sounds should be noticeable.


Plantfog solved this tricky problem by means of a 20-bar pump modules "exotic-3-sub", a submerged pump which was plunged into the lake nearby and camouflaged with pebbles. Electricity and control were hidden near the shoreline. Each tree fern was provided with a subterrean pressure line of black 6 mm PVC hosing. These were fastened on the back side of the trees and connected to the fogging nozzle sitting in the foliage of the plant.
With tree ferns which were visible from all directions the pressure line was covered with coco fibres.
Fogging was timed as periodic, time-dependent interval fogging.

Result: The tree ferns showed upon closing of the exhibition not the slightest dry spells as had been observed in previous years. The managing architect was praising the humidification method and talking of further projects.

[Which we promptly received and delivered]

Project of a tree fern group in the open, around an artificial lake- and watery landscape ("primeaval garden") for a newly planned park in an Austrian community.

We have offered a special configuration for this project.
As humidification with our small 20-bar systems is not feasible for such a large group of trees in the open and as the plan includes romantic fog-scapes over the lake which are created by means of our 60-bar high pressure systems a combination has been conceived.

Part of the pressurized water delivered by the high pressure pump will be reduced to 35 bar which enable the use of
6 mm polyamid hoses certified for 40 bars. The feeder hoses will be attached to the tree trunks as described above.
The substantially higher feeder pressure allows also a larger fog volume which is an advantage in the open, especially with wind dispersing the fog.

Do you have similar problems ?

Contact us, we are sure we will find a fitting and effective solution for you.




Green Islands

In-Door Trees
Small Systems 20 bar

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last modified MAR 2013
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