Outdoor vertical gardens

Outdoor vertical gardens allow greenery to come to the most unexpected of places. From the side of buildings in the heart of a city to a free-standing vertical garden integrated into city furniture. There are many possibilities for vertical gardens outside. 

Watch, as we discuss with our clients in Kamionka how they found the installation of one of our largest projects and the impact the wall has had on the city.


External vertical gardens as part of the Suave EuroClusters program

The green walls featured in the videos below were created as part of participation in the Suave EuroClusters program. These structures serve as evidence that vertical gardens can come in various forms. They can be standalone constructions or living walls shaped like benches. Two of the external vertical gardens are structures supporting different plant species. The PlantaUp panels used to build the vertical garden were planted with species such as Hosta, Phlox subulata, and Geranium macrorrhizum. Edible plants, such as currants, were also included on the green wall.

What do I need to install an outdoor vertical garden?

  1. Water supply.
  2. Drainage connection.
  3. Indoor location for the control panel.
  4. Cable for the temperature sensor.
  5. Cable for gutter heating.

1. Water supply


The water supply for feeding the vertical garden is typically installed approximately 30 centimetres from the top edge of the green wall and terminated with a 1/2″ or 3/4″ internal threaded connector.

However, another option is to bring the water supply as close as possible to the centre of the garden. The water supply is then installed under the floor. 

When planning a large green wall, the water supply is recommended to be made at the top of the garden and terminated with a 3/4″, 1″, or GW/GZ valve.

2. Control location

The control must be installed inside a building. External vertical gardens are irrigated even in winter. Therefore, it is important that the control system is in a warm place. This will prevent any avoidable damage such as from water from freezing in the solenoid valves.

When planning where to install the solenoid valve and irrigation controller you need to ensure there is a water supply. This is vital to ensure the wall can function properly and that all the plants are watered. 

The connection is terminated with a 1/2″, 3/4″, or 1″ GW/GZ valve, depending on the size of the wall. It is from this location the solenoid valve, which is responsible for irrigation will be installed. From this point, we direct the watering system behind the vertical garden. The water supply should be independently installed using a single pipe.

3. Drainage connection


Which drainage connection you choose to use depends on the height at which the vertical garden is installed. 
Green walls can be installed from:
  • From ground level (level zero)
  • Above ground level (+ X cm above ground level)
Outdoor vertical garden from ground level (level zero)
Vertical garden above ground level (+ X cm above ground level) – option one
Vertical garden above ground level (+ X cm above ground level) – option two

4. Temperature sensor

A temperature sensor is used to monitor air temperature (in the shade) around the vertical garden. Preparing the temperature sensor installation involves running a 0.5mm x 2 wire from the control location (indoors) to the outside, near the vertical garden.

During winter, if the temperature falls below 4°C the sensor will stop the irrigation system, restarting the system once the temperature returns above 4°C

By using the sensor, we help to avoid the control panel and watering system being damaged as a result of freezing water. 

5. Heating cable

To protect the gutter from freezing, a heating cable should be installed in it. To prepare for installation, an electrical cable with a cross-section of 3 x 1.5 mm should be connected from the control location (indoor) to where the gutter is to be installed. During winter watering, the heating cable will protect the drainage and the gutter from freezing.

We invite you to view our projects in the green wall gallery. If you are interested in building an outdoor vertical garden, please contact us through the contact form below.