Threadleaf Coreopsis (coreopsis verticillata): This looks like Moonbeam Coreopsis. You'll be able to confirm the identity once it blooms. 'Moonbeam' has pale yellow flowers. Other varieties have more golden yellow flowers. No matter what the color, they're plentiful! If you remove the spent blossoms, or deadhead, Threadleaf Coreopsis will continue to bloom. If this description doesn't fit your plant, send us another photo when it's blooming and we'll try again!