2. What to Plant
“Just like you would if planning a backyard, think about the style you want your green roof to have, as well as your intended uses for it,” says Matt. “Considering these factors from the outset will help you plan and execute your rooftop haven much more effectively.”
“And, if you’re unsure or low on inspiration, it might be worth getting a professional landscape designer in to do the job,” adds Matt.
“In subtropical climates, many roofs need to contend with extreme weather conditions year-round – blistering heat in summer, and lots of rain and wind in the cooler months,” says Matt.” As such, you’ll ideally want to work with plant species that are hardy and weather resistant, as well as suitable in size for the rooftop space. And if the rooftop is difficult to access, you’re best to choose plants that require minimum maintenance.”
“Plants that flourish in containers are often best for growing in artificial spaces like rooftops,” notes Matt.
“Succulents, grasses and coastal species such as Cassurina glauca and Carpobrotus are great groundcovers and spillover plants,” says Matt.
"Pennisetum, Lomandra and Poa look amazing as ornamental grasses, and will also work to soften the overall look of the space,” he adds.
“Ball-shaped and architectural plants can also help lift a rooftop space. Some great low-maintenance options include succulents like Agave, Kalanchoe and Crassula. These varieties can also handle dry conditions, and have limited root-systems, so can survive in shallow soil.”
“If you’ve got good rooftop access, you might consider growing a range of organic vegetables and herbs – and you’ll be able to switch them up depending on what’s in season,” says Matt.
“For easy-to-grow vegetables, consider the likes of kale, cherry tomatoes, iceberg lettuce, snow peas, spinach, and zucchini. For herbs, I recommend parsley, rosemary, thyme, oregano and mint