Turmeric (rhizome) Grow Your own ,Grow Indoors or Outdoors Turmeric (rhizome) Grow Your own ,Grow Indoors or Outdoors Days to germination: Started by root cuttings, not seeds Days to harvest: 250 days or more (8 to 10 months) Light requirements: Full sun, or slight shade Water requirements: Regular watering Soil: Well-drained soil Container: Necessary for most climates warmer. Your plants wont be able to tolerate any climate colder than 65F. Turmeric is different from most herbs in that you are not going to be harvesting the leaves, but the roots instead. The plant grows an underground tuber, or rhizome much like ginger does Once your plants are established and growing well, they will need very little care from you. During winter months, turmeric needs less water but once the growing season starts you will want to water fairly frequently to keep the soil moist. Bi-monthly or even weekly feedings with a liquid fertilizer is ideal. If you see your plant going to flower, there is nothing to worry about. It wont have any effect on your later root harvest, and the flowers dont actually produce any seeds.