This plant goes by several names such as Lover's plant, Boy's love, Old man just to name a few. Was thinking of adding it to my yard to attract butterflies, bees and to possible keep the cabbage worms off my cabbage

Probably best to check with the people in the Herbs Forum for this inquiry. Herbal usage is a little outside the typical scope of this forum.

Here is a link that might be useful: Herbs Forum