White licorice (Helichrysum petiolare) is a perennial tropical plant with silvery foliage that looks like it's covered with frost. White licorice grows best in USDA Hardiness Zones 9 and 10, meaning that it cannot survive winter temperatures below about 25 degrees F. In colder climates, you can grow white licorice plants indoors or outdoors as annual plants. White licorice usually grows up to only 12 inches tall and 16 to 18 inches wide. To grow white licorice in a container, select a planter pot that is twice the width of the root ball and that has drainage holes in the bottom. Pot the plant in well-draining all purpose potting soil mixed with organic compost.
Plant your white licorice plant in full to partial sunlight in a warm location with well-draining soil. Dig a planting hole that is twice the width of and the same depth as the nursery container.
Mix into the displaced soil some organic compost so that you have equal parts of each. Gently remove the white licorice plant from the nursery container and carefully loosen the outer roots.
Place the roots into the planting hole and backfill the hole with the amended soil. Water the soil to moisten it thoroughly and help it to settle around the roots.
Water your white licorice plant once or twice each week when you receive less than 1/2 inch to 3/4 inch of rainfall. Water when the top 1 to 2 inches of soil feels dry to the touch.
Feed your white licorice plant once every two weeks during the growing season. Apply a water-soluble balanced plant fertilizer, such as a 10-10-10 NPK (nitrogen-phosphorous-potassium), according to the directions on the label.