The translation of the inscription:
I'm very proud of my beautiful garden but one day it
have been invaded by giant snails, I don't know why they
grew so much, that were eating up all the flowers and I tried
to send out all of them but they came back, the Virgen de Guadalupe
sent me a grate idea and I took out the snails and put a ring
of salt all around my garden and they could't get in any more,
I thanks for bee free of the horrible plague.