Have had this plant for 3 years, without any buds or flowers. I bought it from a Private house where its double was in the ground. I was assured it was the same plant. The original plant had yellow flowers,none on mine! In the photos there is a Peony on the right creeping in, its not part of the plant in question Thank you
It could be in the mugwort (Artemesia) family. They are aromatic herbs that can be invasive. They need sun to part shade, minimum water, and are drought tolerant.
It appears to be a Peony. The leaf shape is correct. It would be impossible to tell what color the flower will be, though.
The move and transplant will be very hard on the plant. Keep the best care for it, and it will flower. Unfortunately, it will be hard to say when the plant will be established enough to do so.
Here is an article that will help you to care for it:
The above article was written by Bonnie Grant and mentions simply placing a tarp over the Mugwort if you have an area that will undergo complete rejuvenation. My question is, for how many months should the tarp be left down to ensure that the Mugwort rhizomes are depleted and dead?
Solarization should kill the weed roots but may not be enough to kill bulbs, rhizomes, etc.
Chemical control is doable, but even that will take two years. If you want to try the tarp method first, leave it down for two to three months. In winter, leave it for six months. Here is more from university extension: