Depth of soil for roof gardening requirements varies with the type of plants you want to grow. Grass needs at least 10cms of soil, but preferably 15cm. Sedums can manage with less. Basically, whatever depth of soil plants require on the ground is the same in a roof top environment.
Other points to consider are the weight and stress that soil and plants places on your roof. Check that your roof is structurally sufficiently strong to carry the additional loading of soil, plants and water held within the soil.
In a roof top environment plants will be exposed to higher sunshine, higher winds and hence higher evapo-transpiration rates. So hardy wind tolerant, drought tolerant plants will perform best.
Because they do not get the sunlight that they need.
No, plants do not need sodium to grow. They need protein to grow.
Aloe plants need a pot that is at least 6-8 inches deep and has good drainage to thrive and grow successfully.
Plants need sunlight, water, and soil to grow.
Yes, plants need sunlight to undergo photosynthesis and grow.
Plants need light to grow at all. Except fungi.
Plants that grow in LEAVES are KATAKA-TAKA plants
all plants
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Yes; plants do need warmth to grow. The warmer it is, the more nutrients a plant can gather.
yea but they need the carbon more ,thats why plants need water to grow H2O. hydrogen and oxigen
To grow