This is also very invasive. Two years of in and out of the hospital and my yard has been taken over by it. Since I am on SS, I cannot afford to hire someone to cut and dispose of it. Now that doctors have released me to do yard work, I am in for an uphill battle against it. Cuivre river park has been spending at least $7000.00 per year to eradicate it for at least 4 years. Also, it does not have a good scent and I do not see butterflies, bees anywhere near it.