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Ulam Raja
Cosmos caudatus
- Days to harvest
- 30–45 days
- Sunlight
- 6–10 hours/day
- Watering
- 4–6 per day
- Plant spacing
- 30 cm
- Minimum container size
- 25cm deep × 25cm wide
- Container-friendly
- 2 plants per container
- Estimated yield
- 90 kg / 100m²
- Life span
- annual
Climate Requirements
- Ideal temperature
- 22-35 °C
- Annual rainfall
- 1000-2500 mm
- Humidity
- 65-85%
- Heat tolerance
- moderate
- Drought tolerance
- moderate
Soil & Planting
Planting method
Direct seed; 20x30 cm; highly self-seeding
Soil requirements
Any well-drained soil, pH 5.5-7.5
Companion Plants
- Lemongrassmoderate
Lemongrass provides wind protection and pest deterrence for ulam raja border planting
- Pandanmoderate
Ulam raja and pandan both thrive in partial shade; traditional Malay herb garden combination
- Turmericweak
Ulam raja and turmeric complement each other in shade gardens; both are traditional ulam herbs
Common Pests & Diseases
Common pests
Market Demand
Moderate — niche traditional ulam market; Malay restaurants premium side dish; antioxidant health positioning
Regional Notes
Native to SEA. Rich in anthocyanins, calcium, beta-carotene. Health food segment opportunity. Very low competition in modern retail.
Sources
- Malaysian Herb Growing Guide — MARDI · Last reviewed: 2024-06-15
Wikimedia Commons, CC BY 3.0
Category: Herbs