This Buddleia or Buddleja is a large, dark green shrub with hundreds of yellow-gold blossoms that are round to oval. It has dense tight foliage that makes a nice privacy hedge where it is not cold enough to kill it back to the ground. Like most butterfly bushes it will remain evergreen in warm winter climates.
This plant is sometimes available in plug trays. These trays hold 128 of all the same plant. They are a great low cost way to fill a lot of space. Each cell is 3/4 of inch by an inch. Check here to see if Sungold Butterfly Bush Plug Trays are available.