How to Grow. Taro is a tropical or subtropical plant that requires very warm temperaturesand consistent moisture to thrive.Taro corms can be planted in dry or wet settings. Taro requires rich, moist, well-drained soil to moisture-retentive soil.Planting time. Plant taro when the weather and soil has warmed in spring. Taro requires at least 200 frost-free days to reach maturity. Harvest. Taro tubers are harvested about 200 days after planting when leaves turn yellow and start to die. 
