Most people and garden books describe Tansy as invasive, intrusive, poisonous, and not worthy of space in your garden, I don't share this view as you can see. lol There are no small children left here at the Cabin, my grand-daughters who visit know all my berries, flowers and herbs, and all the related info pertaining to them. Our dog Dukie a large German Shepard has never shown an interest in any of our plants, so for us there has never been a problem.
The original Tansy Plant was given to me by a friend, dug right out of her garden. Which makes it even more special, I in turn have gifted a few friends with clumps from my garden. I love the look of the plant when it first starts growing, the flowers when they bloom, and the dried flowers placed all around the Cabin. I have decorated Christmas Trees with small bunches, I have them hanging in large bunches on cupboard doors and on racks. I also fill boxes and baskets with the dried bunches some of which I have had for years. So for me this "road side weed" as many people call it, gives me much Pleasure. The deer that roam our property also have absolutely no interest in the flowers or its foliage. :-)