Q.how do we start a roof garden
I am planning to grow the required vegetables for my house on a roof garden. Can you get the design for it?

Certified GKH Gardening Expert
You would need someone local who is familiar with your building to do the design. But we have some great articles on rooftop gardening that should get you started:
https://www.gardeningknowhow.com/special/urban/creating-your-own-rooftop-garden.htm
https://www.gardeningknowhow.com/special/urban/rooftop-gardening-for-city-dwellers.htm
You may also find our category on urban gardening helpful:
https://www.gardeningknowhow.com/special/urban/