The bright leaves of the Persian shield plant (Strobilanthes dyerianus) are almost better than a flowering specimen since they provide stunning color year around. Growing Persian shield plants requires warm temperatures and sultry humid air. The plant performs well in a container inside or outside, in full sun to partial shade. Provide even moisture and high humidity. The best way to give extra humidity to a Persian shield indoors is to place a thin layer of rocks in a saucer and balance the pot on top. Keep the saucer full of water. This keeps the roots out of the water but the evaporation of the water provides higher humidity to the air. You can grow Persian shield outdoors in warm climates and plant them in the ground as part of a border display. In cool zones, however, treat the plant as an annual or bring it inside at the end of summer.