Joan wrote:

I found an old flower pot in the attic and it doesn't have drainage holes.
It is 9 inches in diameter. I'd like to put something in it, but need advice
about what to plant, and how to provide drainage.


If it's a pot you particularly like, put an 8" plastic pot with drainage
holes inside, and plant in that. You can take the plant out and dump
out the water after a rain, etc.

If it was about twice as big, you could plant a waterlily in it.

Bob