Growing Taro: From Planting to Harvesting Edible Corms

How long does taro take to grow? Taro (Colocasia esculenta) typically takes 7 to 12 months from planting to harvest, depending on the variety, climate, and whether you are growing in upland (dry) or lowland (flooded) conditions. The corms are ready when the leaves begin to yellow and die back, usually in late summer or autumn.

What Is Taro and Why Grow It?

Taro is a tropical perennial plant grown for its starchy, underground corms. It is a staple food in many parts of Asia and the Pacific, including India, and is also popular in Thai cooking. The plant has large, heart-shaped leaves that can be green, purple, or variegated, and the corms have a rough, brown skin with a white or purple-flecked flesh. When cooked, taro has a mild, nutty flavor and a creamy, slightly grainy texture. It is used in both savory dishes (like Thai taro curry) and sweet desserts (like taro coconut pudding).

Understanding Taro Cultivation: A Basic Guide

Taro cultivation involves planting corm pieces or suckers in moist, well-prepared soil. It thrives in warm, humid environments with plenty of water. There are two main systems: upland (dryland) taro, grown in well-drained soil with regular irrigation, and lowland (wetland) taro, grown in flooded paddies similar to rice. In home gardens, upland taro is more common and easier to manage.

Choosing Planting Material

Taro is propagated vegetatively from:

• Corm pieces: Small sections of the main corm with at least one bud or "eye."
• Suckers: Young shoots that develop from the parent plant.
• Huli: The top portion of the corm with the basal leaf stalks attached.

For Thai cooking, popular varieties include the large, white-fleshed 'Bun Long' and the smaller, purple-flecked 'Thai Small'. Choose planting material that is disease-free and about 2-4 inches in size.

Preparing the Soil

Taro needs rich, loamy soil with high organic matter. The soil pH should be between 5.5 and 6.5. For upland cultivation, work in plenty of compost or well-rotted manure to a depth of 8-12 inches. If you're planting in a wet area, you can create raised beds or trenches to manage water. In Thai gardens, taro is often planted near water sources or in partially shaded areas, as it can tolerate some shade but grows best in full sun with adequate moisture.

Planting Taro Step by Step

1. Timing: Plant taro after the last frost when soil temperatures are above 65°F (18°C). In tropical regions, planting can be done year-round if water is available.
2. Spacing: Space plants 2-3 feet apart in rows 3-4 feet apart. Taro needs room for its large leaves.
3. Depth: Plant corm pieces 3-4 inches deep with the bud facing up. For huli, plant so that the base is just covered with soil.
4. Watering: Water thoroughly after planting and keep the soil consistently moist. Upland taro may need watering every 2-3 days in dry weather; lowland taro should be kept in standing water a few inches deep.

Water Management

Consistent moisture is crucial for taro growth. The soil should never dry out completely. For upland taro, mulch heavily to retain moisture. For lowland taro, maintain a water level of 2-4 inches above the soil. Taro can tolerate brief flooding but not waterlogging in upland systems, which can cause rot.

How Taro Looks and Tastes in Thai Food

In Thai cuisine, taro is appreciated for its unique sensory qualities:

• Color: The flesh ranges from white to pale purple with tiny purple specks. When cooked, it becomes slightly translucent and creamy.
• Shape: Taro corms are oval to round, often with rings and hairy roots. Sliced, they reveal a smooth, dense interior.
• Texture: Cooked taro is starchy and slightly grainy, similar to a potato but denser and more slippery when boiled. It holds its shape well in curries but can be mashed for desserts.
• Aroma: Taro has a subtle, earthy, and slightly sweet aroma, reminiscent of chestnuts or sweet potatoes.

Common Thai dishes featuring taro include:

• Kaeng Kari (yellow curry) with taro chunks instead of potato.
• Taro coconut dessert (Pueak Gai Buat): taro pieces simmered in sweet coconut milk.
• Taro spring rolls: mashed taro mixed with spices, wrapped and fried.

Kitchen Tools and Preparation Tips

To handle taro, use a vegetable peeler or knife to remove the thick skin; wear gloves as the raw corm can irritate sensitive skin. Cut into even chunks for even cooking. Simmer in coconut milk or broth until tender (about 15-20 minutes). For a simple treat, steam taro chunks and drizzle with sweetened coconut cream.

Substitute: If taro is unavailable, you can use sweet potato or yam in some dishes, but the flavor and texture will differ—sweet potato is sweeter and less starchy, while yam is drier. Taro's unique sliminess when cooked is hard to replicate, but it adds body to soups and desserts.

Harvesting: When and How

Harvest readiness is indicated by the yellowing and dying back of the leaves, usually 7-12 months after planting. To check, gently dig around the base to feel the corm size; mature corms are typically 1-3 pounds. Harvest by loosening the soil with a fork and lifting the entire plant. Cut off the leaves and roots, and store corms in a cool, dry place for up to a few weeks. In tropical climates, you can leave taro in the ground and harvest as needed, but be aware of pests.

Comparing Taro Cultivation in Different Regions

In taro cultivation in India, the crop is often grown as an intercrop with turmeric or ginger, and the leaves are also used in dishes like patra. In taro cultivation in Asia and the Pacific, wetland systems are common, with complex irrigation. For home gardeners, upland cultivation with consistent moisture is most practical.

Taro cultivation PDF guides from agricultural extensions often provide detailed variety recommendations and pest management; however, the basics remain the same: rich soil, plenty of water, and patience. A taro farm in Thailand might feature neat rows of large, elephant-ear leaves, a beautiful sight that promises a delicious harvest.

Taro is a rewarding crop that connects you to Southeast Asian culinary traditions. With a little care, you can grow this versatile root at home and enjoy its unique taste and texture in your own Thai-inspired dishes.