Trees don’t just add to the aesthetics of an environment, they are highly beneficial to the environment and its stakeholders. The benefits include purifying the air by producing oxygen and absorbing CO2 and other pollutants such as nitrogen, ammonia and sulphur dioxide. In addition, trees provide various physical and mental benefits. Trees are imperative to a city’s development and are loved by architects for various reasons everywhere. Trees provide shading on the concrete streets thus reducing the temperature of the street as well as the entire city. Trees also help reduce noise pollution and even flooding during heavy rain and storms. Studies have shown that environments with landscaping experience lower crime rates, and even increase property value.
Four Aspects to consider when planting trees in cities There are important aspects that one has to consider when planting trees in cities such as the area where the trees are planted, the quality of the soil, whether the climate is suitable and the quality of the trees.
1. Area (Location)
In order to ensure the successful growth of the trees planted, landscape architects have to consider the area where the trees are planted. One has to consider if the trees will be planted in parks, alongside highways or close proximity to pedestrian pathways. The area will determine the amount and frequency of the maintenance of the trees. Planting trees in allocated parks requires less maintenance with regards to cutting unlike in areas with limited space such as pathways. It’s best to find out whether the area offers a cleaning service that caters to the removal of debris. Unremoved Debris can be dangerous for pedestrians, bikers, even cars. Tree canopy should be at an appropriate distance from buildings in order to ensure proper development of the tree as well as preventing damage to the property from uncontrolled root development.
2. The quality of the soil
Soil quality will ultimately determine the successful development of the trees. Not all urban spaces provide quality soil, sustainable improvements may need to be made. Some soil may require additional minerals such as mineral wool flocks or cubes. These hold and retain moisture in the root layer longer especially during times of drought. Fertiliser can be added as part of the usual maintenance of the plants if the soil has insufficient minerals. Additional minerals prevent the nutrients in the water from flowing away from the lower layers of the soil. If the soil is compressed, it is imperative to ensure good drainage. This can be achieved by adding perlite or clay pebbles to the planting pit.
3. The size, shape and canopy of the tree
The size and shape of the tree will determine its maturity and growth. One has to consider how tall the tree will grow. One has to ensure that the tree won’t conflict with anything once it reaches its full length such as electrical cables and other tall trees. There needs to be enough space between the trees and the building. Small trees may be planted closer than 4 metres, but large trees should be planted 6 meters or more away from buildings. Trees with huge canopies can be hazardous and should be planted far away from traffic and traffic lights. When coming to planting trees in parking lots, some trees are unsuitable due to their root structure. Trees with deeper roots rather than roots that spread out on the surface are always the best option. Trees drop leaves and branches, some drop seed pods, fruits or nuts. Debris can require frequent maintenance and could be costly. It’s always best to research the tree’s debris.
4. Choosing the correct trees for your climate is imperative
The climate is one of the determining factors whether a tree will grow or mature to its full potential. It is best to choose indigenous trees since they have a better survival rate and require less maintenance. Indigenous trees thrive in areas where they belong, so make sure to plant the right tree in the right climate. Some trees are frost resistant meaning they would be more suitable for colder climates. Drought-tolerant trees require less water so they would be suitable for a more temperament climate. Exotic trees can also be planted in some climates, however an exotic tree becomes an invasive tree that endangers natural vegetation when it’s abandoned and is left to spread. Always consider the climate in which the trees will be planted. It’s best to research your trees and determine whether they will be suitable for your climate.
These are the most important aspects to consider for urban landscaping. These tips will help reduce costs and ensure that your urban landscaping projects are successful. Just Trees located is in the Western Cape and Gauteng, has a wide variety of trees that are suitable for urban landscaping. Visit www.justtrees.co.za to see the available trees.