Winter hardy to USDA Zones 10-11. In colder zones, plants may be grown directly in the ground (if dug in fall), in containers or as houseplants (dwarf varieties especially). Best grown in organically rich, medium moisture, well-drained soil in full sun. Plants tolerate and often appreciate some part shade or light filtered sun in the heat of the day. Needs consistently moist soils that do not dry out. Fertilize regularly during growing season. Site plants in areas protected from strong winds which can severely damage the large leaves. For containers, use a well-drained potting soil mix. Keep container soils consistently moist but not wet. Outdoor plants must be overwintered indoors, either as houseplants or by forcing plants into dormancy. Options for overwintering include: (1) Bring container indoors in fall before first frost and place in a large sunny room for overwintering as a houseplant, with reduced water and fertilization; (2) If plant is too large to bring inside as a houseplant, cut foliage back to 6-8†in fall after first frost, and store container in a cool, dark, frost-free corner of the basement until spring. It is best to provide just a touch of moisture as needed in winter to prevent the soils from totally drying out; (3) If container is too heavy or too large to bring inside, remove plant from container in fall before first frost, wrap roots in plastic and store in a cool, dark, frost-free corner of the basement until spring. When using this option, foliage may be trimmed back or left on the plant and allowed to brown up in the normal course; (4) If growing plants directly in the ground, dig, wrap roots, trim back the leaves and store as in option #3 above.
