Introduction to Taro (Dasheen)
Taro (Dasheen), scientifically known as Taro (crop), is a staple root crop cultivated for its edible corms and leaves throughout tropical and subtropical regions. The plant has been grown for thousands of years in wetland systems and remains critical for food security in Pacific Island nations, parts of Asia, Africa, and the Caribbean. Its corms provide a gluten-free source of complex carbohydrates while the leaves supply vitamins A and C when properly prepared.
Commercial and small-scale growers value taro for its adaptability to flooded conditions where few other crops thrive. The crop performs best in areas with consistent moisture and warm temperatures, making it ideal for regions unsuitable for upland staples such as Rice (crop). With rising interest in climate-resilient agriculture, taro is gaining renewed attention for its ability to tolerate periodic flooding and poor drainage.
This definitive growing guide delivers professional-grade information on every stage of production, from site selection and propagation to harvest and post-harvest handling. Whether managing a commercial wetland plot or a backyard wetland garden, the practices outlined here maximize yield while maintaining soil health.
Botanical Profile of Taro (Dasheen)
Taro belongs to the Araceae family and is a herbaceous perennial that grows from an underground corm. The plant produces large, heart-shaped leaves on long petioles that emerge directly from the corm, creating a lush canopy that shades the soil and reduces evaporation. Flowers are rare in cultivated varieties and consist of a spathe and spadix typical of aroids.
The edible portion is the corm, a swollen underground stem that stores starch. Cormels, or daughter corms, develop around the main corm and are often preferred for their tenderness and flavor. Leaves and petioles are also consumed after thorough cooking to neutralize calcium oxalate crystals that cause itching.
Taro exhibits considerable genetic diversity, with cultivars varying in corm color (white, pink, or purple), leaf morphology, and growth habit. Some varieties are adapted to upland conditions while others require continuous flooding. Understanding varietal differences is essential for matching plant material to local climate and water availability.
Soil, pH, and Climate Requirements for Taro (Dasheen)
Successful taro production begins with matching site conditions to the crop's physiological needs. The plant demands warm temperatures, high humidity, and abundant moisture throughout the growing cycle.
| Parameter | Ideal Range | Notes |
|---|---|---|
| Soil Type | Loamy to clay loam | High organic matter improves water retention |
| Soil pH | 5.5 – 6.5 | Slightly acidic conditions optimize nutrient uptake |
| Temperature (Day) | 25–35 °C | Growth slows below 20 °C |
| Temperature (Night) | 18–24 °C | Frost causes severe damage |
| Annual Rainfall | 1500–2500 mm | Supplemental irrigation required if rainfall is erratic |
| Relative Humidity | 70–90 % | High humidity reduces leaf scorch |
| Elevation | 0–1500 m | Lowland cultivars tolerate sea-level flooding |
| Water Depth (Flooded) | 5–15 cm standing water | Maintain consistent level during active growth |
Upland taro can be grown on well-drained slopes with heavy mulching, but flooded culture remains the traditional and highest-yielding method. Poorly drained sites prone to waterlogging outside the growing season should be avoided to prevent corm rot.
Step-by-Step Planting & Propagation
Taro is propagated vegetatively using corm pieces or whole cormels. Select healthy, disease-free planting material from high-yielding mother plants. Each propagule should weigh 50–100 g and contain at least one visible bud.
- Prepare the field or raised beds by incorporating 10–15 cm of well-rotted compost or aged manure.
- Create planting holes or trenches spaced 60 cm apart in rows 90–120 cm wide for flooded culture.
- Plant propagules 5–8 cm deep with the bud facing upward.
- For upland systems, apply 5–8 cm of organic mulch immediately after planting to conserve moisture.
- Flood the field gradually over 7–10 days until water depth reaches 5–10 cm, or maintain soil moisture at field capacity for upland varieties.
- Monitor emergence, which typically occurs within 10–21 days depending on soil temperature.
Replanting intervals of 8–12 months are common in continuous wetland systems. Rotate with Cassava (crop) or legumes every 3–4 cycles to break disease cycles and restore soil fertility.
Care & Maintenance regimes for Taro (Dasheen)
Consistent water management and balanced nutrition are the cornerstones of high taro yields. The following table outlines recommended schedules for water, fertilizer, and pruning.
| Growth Stage | Water Management | Fertilizer Application | Pruning / Canopy Management |
|---|---|---|---|
| Planting–30 days | Maintain 3–5 cm standing water | 20 kg N/ha at 2 weeks after emergence | Remove yellow or damaged leaves weekly |
| 30–90 days | Increase to 8–12 cm standing water | 40 kg N + 30 kg P + 60 kg K/ha split application | Thin dense foliage to improve air circulation |
| 90–150 days | Maintain 10–15 cm water depth | 30 kg N/ha at 90 days; side-dress K if needed | Cut back older leaves to direct energy to corms |
| 150 days–Harvest | Gradually reduce water 2 weeks before harvest | Optional light K application 3 weeks pre-harvest | Cease pruning; allow natural senescence |
Weed pressure is highest during the first 60 days. Hand weeding or shallow cultivation between rows prevents competition without damaging shallow feeder roots. Mulching with rice straw or leaves further suppresses weeds and moderates soil temperature.
Pests, Diseases & Organic Management
Taro is susceptible to several insect pests and fungal diseases that can reduce both yield and corm quality. Early detection and integrated cultural practices form the foundation of organic management.
Common pests include Aphids (pest), Thrips (pest), and Root-knot nematodes (pest). Aphids and thrips are controlled with regular applications of insecticidal soap or neem oil. Nematode populations are reduced through crop rotation with Ginger (crop) or Turmeric (crop) and by incorporating marigold residues.
Major diseases are Phytophthora (disease) leaf blight, Pythium (disease) corm rot, and Dasheen mosaic virus. Resistant cultivars and strict sanitation of planting material are the primary defenses. Copper-based fungicides or bio-fungicides containing Bacillus subtilis provide additional protection during prolonged wet periods. Remove and destroy infected leaves promptly to limit spore spread.
Harvesting, Curing & Optimal Storage
Taro reaches maturity 8–12 months after planting, indicated by yellowing of older leaves and cessation of new leaf production. Harvest by carefully loosening soil around the plant with a digging fork and lifting the entire corm cluster.
Separate cormels from the main corm immediately after harvest. Cure corms in a shaded, well-ventilated area at 25–30 °C for 3–5 days to allow wound healing and reduce moisture loss. Avoid direct sunlight that can cause sunscald.
Store cured corms at 10–15 °C with 80–85 % relative humidity for up to 4 months. Do not refrigerate below 7 °C, as chilling injury causes internal breakdown. Leaves remain fresh for only 2–3 days and should be used promptly or blanched and frozen.
Companion Planting for Taro (Dasheen)
Strategic companion planting enhances biodiversity, improves nutrient cycling, and provides natural pest suppression. Thai Basil (crop) planted along field borders repels aphids and attracts beneficial insects. Ginger (crop) and Turmeric (crop) grow well in the same flooded conditions and benefit from the partial shade provided by taro leaves.
Leguminous cover crops such as Clover (crop) sown during fallow periods fix nitrogen and improve soil structure before the next taro cycle. Marigolds interplanted in rows deter nematodes and add vibrant color while supporting pollinators. Avoid planting taro near Potato (crop) or Tomato (crop) because shared susceptibility to Phytophthora species increases disease risk.
For additional resilience strategies, see The Hidden Power of Mulching: 8 Organic Strategies to Transform Small Farm Soil.