Cherry Pie, Mary Fox, White Queen — they all refer to that old, cottage garden beauty: heliotrope (Heliotropium arborescens). This low growing plant is hardy to grow in zones 9 to 11.At full maturity, plants reach a height of 1’ to 4’ feet with an equal spread.It also comes in varieties with much more compact growth of only about 10” inches.The plant flowers with small star-shaped flowers in shades of blue, purple, white, or lavender.They cluster together and are characterized by a strong scent of vanilla.