Hanging gardens and green roofs: all the benefits of plants in the city

In modern cities, urban greenery plays an essential role in improving the quality of life. However, the lack of space often limits the creation of parks and green areas. To overcome this problem, innovative solutions such as roof gardens and green roofs are gaining popularity thanks to their numerous environmental and aesthetic benefits. These structures not only help reduce urban temperatures but also promote biodiversity, mitigating the negative effects of urban sprawl.

• Reduction of urban temperatures
• A refuge for biodiversity
• How to create green roofs and roof gardens

Reduction of urban temperatures

One of the main advantages of roof gardens and green roofs is their ability to counteract the urban heat island effect. Building surfaces absorb and release heat, increasing the temperature of the surrounding environment. Green walls and vegetation-covered roofs provide natural insulation, reducing heat absorption and promoting cooling through plant evapotranspiration. This phenomenon helps maintain lower temperatures, improving thermal comfort in cities, especially during the summer months.

A refuge for biodiversity

Green roofs and roof gardens are not just decorative elements, but represent true habitats for pollinating insects, birds, and other wildlife. In an urban context often lacking green areas, these solutions offer refuge and food for local wildlife, contributing to the conservation of biodiversity. Furthermore, the variety of plants used promotes pollination and improves air quality by absorbing carbon dioxide and other pollutants.

How to create green roofs and roof gardens

To create a green roof or roof garden, it is essential to choose the most suitable plants and adopt an efficient irrigation system. Before proceeding with installation, the load-bearing capacity of the building or chosen space must be assessed to ensure it can support the weight of the vegetation. An adequate waterproofing system protects the structure from moisture, while a drainage layer prevents water from pooling.

The selected plants should be resistant to difficult conditions and require low water. All BotanicalDryGarden varieties are also suitable for creating roof gardens. In these environments, the limited depth of the substrate can make root growth more difficult, requiring more frequent watering than traditional gardens. Furthermore, the surface underneath can heat up quickly, accelerating water evaporation. For this reason, it is recommended to prepare a soil layer of at least 15 cm and install a sub-irrigation system to optimize water supply.

A particularly effective solution for these spaces is the use of plants in flat pots, a special creation by BotanicalDryGarden. This system involves installing plants already placed in a special pot, such as the R50 model, a bottomless cylindrical plastic container, 20 cm high and with a diameter of 50 cm. This pot is designed to promote horizontal root growth, ideal for spaces with shallow soil, such as green roofs, roof gardens, and rock gardens. For planting, simply remove the plastic, avoiding damage to the roots.

Roof gardens and green roofs represent innovative and effective solutions for improving urban sustainability. They help reduce temperatures, support biodiversity, and offer aesthetic and psychological benefits to citizens. Investing in these green structures can transform cities into more livable and harmonious environments, promoting urban development that is more mindful of nature.