Q.How do I plant flowers in metal hanging pots?
I have bought metal hanging pots (no holes in the bottom)
I was wondering what to put in them. Should I put a potted plant in it or can I put soil straight in with a seed?

Certified GKH Gardening Expert
You will want to plant them in a plastic pot that keeps the roots from touching the paint or metal. Depending on the type of metal, it can be toxic to the plant. The same goes for the type of paint. They are meant to house a container of a similar size as a decorative shell.
As far as what to plant... It is very difficult to get a size reference from a photo, but there are things that will grow in small containers, such as strawberries, miniature tomatoes (like the Tiny Tom variety) basil, and many other small herbs.