Strobilanthes 'Persian Shield' is an exotic perennial in its comfort zone (hardy in USDA Zone 10 and 11), valued for its vivid purple foliage. In cooler areas, 'Persian Shield' makes a wonderful annual, great for use in containers or in the garden. Lavender flowers appear in the summer, but they're far less showy than the foliage. The plant grows to three to four feet and may require pruning. Performs great in full sun to partial-shade; give it good soil and regular watering. It can also be over-wintered indoors.