Some plants, like marigolds, are good for repelling pests.
The French and African marigolds, favourites of some, are allied to this.
We dug a hole in the soil and then we planted the marigolds and put soil around them.
Reply I have always used African marigolds to reduce nematodes on my onions.
They might cut it up into quaint shapes and dot it with red daisies or yellow marigolds.