Christiane wrote:

What can I do to keep my flowers squirrel free?

I saw this in reference to keeping cats out of pots, but it ought to work
for squirrels as well. You can cut wire mesh to the size of the pot, add
a slit and an opening that will fit around the plant, fit it in the pot
around the plant, and cover it with a shallow layer of soil. Probably
won't work as well for the lettuce, though.