I have a plan to make my garden a little special in nature. My garden is on the top of my house. Kindly tell me how can adjust the type of trees on my garden.
From what I know about rooftop gardening, it can be quite a challenge indeed to find appropriate plant material. Depending on the size of the area you have there are varieties of trees that will flourish for you. Japanese maples can be planter grown and controlled nicely. They have wonderful textured leaves and a beautiful color. Maybe a group of pyramid cedars would help. How about a flowerering shrub that gets a bit larger say, a viburnum or butterfly bush. Spireas also give 3 season wonder with the foliage, flower and leaf color, especially 'gold flame'. Bridal wreath spirea will grow to be about 7-8' and spread 5-6' but has nice small white fragrant flowers in spring/early summer.
The type of trees/plants should not vary from those you would plant on the ground. Depending on where you live and what season it is, different trees and plants will flourish. Just make sure the roof is strong enough to support the weight of the plants and the heavy dirt.
Ice plant, stonecrop, sandwort, woodland strawberry, cup flower, yarrow and thyme are suitable for roof gardening.A rooftop hydroponic gardening is also an effective alternative to other gardening methods to growing fruits, vegetables and herbs.