There are many reasons one can decide on building a rooftop garden, among them; location, ornamental purposes and for the use of social gatherings. For the person in areas that do not allow for gardens around the home because of limited or no space, rooftop gardens provide the perfect solution. They can be traced back to the Hanging Gardens of Babylon and became popular in modern use with the rapid and extensive growth of high-rise buildings.
The best way to determine if your rooftop makes the perfect place for a garden is to study it at intervals throughout the day to ascertain how much sun and shade the area receives at any given time, be sure to document your findings on paper to make sure that you can revisit them when necessary.
Making Preparations for your Garden
When planning your garden, think of a theme that best suits you since you will have to buy the necessary containers to house your plants, clay based ceramic pots are a favorite. Some Terra cotta pots (which are also unglazed), are chosen because they are porous hence assist with proper drainage for plants that require this. Terra cotta pots can also help with achieving a Tuscan look; if unavailable try other containers or pots that are glazed with Mediterranean colors. For those who prefer a more contemporary feel, black and white is a suitable match.
Besides pots, window boxes, 6 to 7 inch masonry beds (built-in), 18-24 inch masonry retaining walls, terrace boxes (mainly made of cedar or redwood) starting at 18 inches deep and 4 to 5 feet wide can be used. Planters or tubs; including barrels, wooden cubes and structures made from concrete and fibre glass (for a more modern look) can also be used.
The next step is to decide on which flowers or plants you will grow. Based on the results of your observation you should have an idea of what you can or cannot grow based on the plants’ need for sunlight or shade, you can also start to plan what goes where. Do research on the flora chosen or get advice from persons at your local garden center. During this stage you can also decide whether to start from planting seeds or skip to bedding plants for a faster result.
Before you start planting, try arranging your containers on the roof to see how well your pattern suits your style or taste. Experiment with them to ensure that your final arrangement adds the level of interest and sophistication you want. The best look comes from placing them at different heights to create somewhat of a layered look. Natural materials like bricks (especially if in a color that compliments your garden) can be used for elevation.
Once the planning and purchasing of everything needed is over, start planting. Be sure to use the necessary fertilizers and pest control methods, both can be store-bought or homemade, organic or chemical based. Many potting mixes can be used to ensure that soil is rich and balanced for each plant or greenery chosen. Be sure to find out how each operates in the different seasons and water as needed.