What are pros and cons of roof garden?

The pros of a roof garden are:

• If you plant flowers, it will be pretty and you will have fresh bouquets any time you want them.
• If you plant vegetables and herbs, you will have fresh food to eat that is nutritious and tastes good.

The cons:

• Since you will be planting in containers, you will need to select varieties that grow well in containers and will be limited as to what you can grow.
• Containers dry out faster than planting in the ground, so you will need to water them more often and be careful not to overwater them