Evidence is weak or anecdotal. Enjoy plants without relying on them as barriers.
A living plant differs from concentrated oil. Neither seals an entry gap.
Rat-control evidence is weak. Concentrated lavender and mint oils are a concern around cats.
Marigold and citronella pots do not form a dependable protective boundary.
Daffodils are toxic to cats and dogs. Garlic and bay leaves do not provide reliable protection.
Choose pet-safe plants. Do not put concentrated oils on bedding or surfaces pets lick.
Use sealed containers, repair entry routes and clear clutter. Add a deterrent as one layer.