Converting your roof into a green roof is a great way to help the environment, beautify your home, and also increase the landscaped area of your yard. With a roof accessible to you and your family, why not make it into a usable space you can enjoy? With the right type of lawn and decorative flowers growing on your green roof, you can make this spot your new favorite yard hangout.
When growing a green roof on your home or other outdoor buildings, lawns are a good type of plant that grow well on this type of foundation. Make sure you have a permanent green roof irrigation drip system installed that won't over water and cause soil erosion from your roof beds. Also, remember to fertilize your lawn for healthy growth.
Mowing your roof lawn may be something you don't want to worry about, so you should consider a mix of fescue lawn seed that is a non-mowing lawn. This type of no-mow grass seed does not grow as much as regular lawn and is great in drought conditions, so you won't need to water it much. Although it is called a no-mow grass, you will need to mow it once or twice a year. It also will grow well in direct sunlight on your roof and doesn't need to be fertilized a great deal.
No-mow grass seed will grow a thick root system, which prevents weeds from growing in your lawn. You will have the cool, green space on your roof that you want without weeding.
When you have a rooftop lawn growing on your home, you may want to plant a colorful boarder of flowers. These flowers need to be hardy enough that they are drought resistant and survive well in full-sun conditions. You don't want flowers that need a specific depth of soil to survive on the roof, so flowers that are not picky about their environments are the ones you want to consider.
For a ground cover that has bright, yellow flowers, Sedum kamtschaticum, or orange stonecrop is a good choice. This is a flower that can go without water for many weeks and it will create a thick carpet-like covering for your roof. It thrives best in zones 3, 4, 5, 6, 7, 8, and 9.
A second type of ground cover plant will give you bright red and purple flowers. Delosperma dyeri is also a hardy plant that will grow well all over in North America on a roof garden with good drainage. It attracts hummingbirds and butterflies which will increase your roof's attractiveness.
For a fast growing ground cover, Delosperma cooperi is an ice plant that holds up well in drought conditions. It is native to South Africa and does not like the shade, so make sure to plant this flower all around on your rooftop's sunniest spaces. The flowers on this plant are bright purple and the leaves are succulent and fleshy. This hardy plant grows best in zones 5, 6, 7, 8, and 9.
For taller plants, you may want some colorful shrubbery on your green roof. Aster oblongifolium is a shrub that blooms purple-blue flowers late in the summer, and into fall, and grows up to two feet tall. It lives well in zones 3, 4, 5, 6, 7, and 8 and does best in sunny spaces.
Another flowering shrubbery is the Chive plant. This plant grows throughout North America and has purple blooms once the plant spouts to about a foot tall. The great thing about this green roof-friendly plant is that you can pick off its stems and chop them up to season your dishes.
Planning and planting the vegetation that will cover your new green roof will make your elevated space enjoyable and pleasant for you and your guests. For more information on structural considerations you should take into account when installing a green roof, visit http://www.palmerroofing.net.