So tick season is coming up, and where I live we are already seeing ticks--it's warm here in Texas. I live in the country, and ticks have always been an enormous problem here. I tried several natural solutions last year but we still use tooooons of chemicals because quite frankly, we have to. But I want to do as much as I can this year with natural solutions so that we can use less--or even NO(hey I can dream) chemicals. Previously, I have used monthly drops, collars, sprayed the yard(more times than I can count), sprayed and fogged the house, bathed the dogs with F/T shampoo, and of course, picked them off. Last year I planted some lavendar in the front yard, which grew well, but unfortunately never got a chance to designate a spot to plant in the backyard. This year I literally want to border my whoooooole backyard in tick-repelling plants. So I've done a little research and have found three plants that supposedly repel ticks that are capable of doing well in this climate: Lavendar Rosemary American Pennyroyal (tickweed) Questions: I haven't seen anywhere that these plants could be harmful to my animals, but just to make sure...has anyone ever heard of these being bad for dogs? Is there any downside to me planting a large number of these plants? I was reading a review for some Rose Geranium oil on Amazon, and the buyer mentioned that pennyroyal had been taken off the market due to side effects. That was in June of 2010 but I'm wondering now if I should be leery of Pennyroyal oil. If this is the case, with the plant itself not be safe??? Herbal medicine is confusing.