How to Grow Curcuma
Curcuma is in the ginger family and is native to tropical regions in Asia. The most commercially significant species of curcuma, Curcuma longa, is the plant from which we get turmeric, the ingredient that gives yellow mustard its color. Sometimes called hidden ginger, many curcuma flowers are hidden within the foliage, at the base of the plant. Those that do rise above the leaves resemble ginger flowers in shape, size and fragrance. Curcuma is a low-maintenance plant that is hardy to USDA Zones 7b to 10b.
Grow your curcuma in full sun in the morning and afternoon shade. Allow the leaves of the plant to let you know if it needs more or less sun. They should be a deep green color, so if they begin to lighten, experiment with different levels of sunlight.
Water the curcuma to keep the soil moist. In particularly hot periods you may need to water daily.
Fertilize in the spring at the first sign of new growth and then once a week in the summer. Use a 15-15-15 formula fertilizer at the rate suggested on the package.
Cut the leaves from the curcuma when it goes into dormancy as winter approaches. The leaves will first turn yellow and then brown. When they become papery and appear dead, cut the foliage and any flower stalks to the ground. Cover the soil with a 6-inch pile of mulch. The rhizomes must remain as dry as possible during dormancy.
Although curcuma plants have tropical origins, most varieties dislike spending the entire day in unfiltered sunlight. Check the information that comes with your rhizome or flowering plant carefully, however. Purdue University reports that some varieties, including C. alismatifolia "Chiang Mai Pink" and C. parviflora "White Angel," do well with either full sunlight or part shade. Aside from fertile beds, curcurmas require well-draining soil. Correct problematic clay soils by digging sand into the garden bed or building a raised bed. If most of your property is boggy or overly compacted or you are short on garden space, grow curcumas in large containers with good-quality potting soil. If you are mixing curcuma with other plants, consider curcuma to be midheight flowers -- most reach between 18 and 24 inches.
- Pruning shears
- Pacific Bulb Society: Curcuma
- University of Florida: Growing and Using Edible Gingers in North Florida
- North Carolina State University Cooperative Extension: Curcuma
- University of Florida IFAS Extension: Growing and Using Edible Gingers in North Florida
- Flowers of India: Hill Turmeric
- Urban Harvest: Growing Ginger, Galangal and Turmeric
- Ecocrop: Curcuma zedoaria
- Purdue University: Cultural Studies in Ornamental Ginger