There are a lot of plants which can be helpful for Flea Control and one of them is penny royal. Although it is quite poisonous, this herb used to be part of ancient Greek and Roman culinary together with other herbs like lovage, oregano and coriander. They usually added this as flavor to their wine. This plant is now not used in food because of its danger. It is on the other hand really useful to get fleas away. We can just plant it in our garden or yard and the fleas would not get close to it because this plant is poisonous and also smelly. Its strong smell repel fleas in no time. It can be crushed and sprayed on the dog’s body but we must avoid the eyes mouth and also nose because this plant is poisonous. The fleas will be killed by the poison and those which haven’t inhabited the dog will get scared by the smell.