Persian Shield (Strobilanthes dyeranus) and Clivia (Clivia Miniata) are excellent thriller plants for shade. Both, incidentally, have outstanding tropical appeal. Persian Shield has magnificent exotic foliage and is an exciting thriller shade plant for pots growing 3 to 4 feet tall. When you are looking for tropical flair, vibrant blooms, and a showstopping thriller plant, Clivia or Flame Lily is your answer. Flame Lily grows 1 to 2 feet tall and 2 to 3 feet wide and each central flower stalk holds 2- to 3-inch-long funnel shaped flowers in yellows, oranges, and reds in clusters of 10 to 20 blooms.