Coriander
Coriandrum sativum
📖 About this plant
Coriander (Coriandrum sativum), known as dhania in Hindi, kothamalli in Tamil, and cilantro in Spanish/English (the leaves), is an annual herb in the Apiaceae (umbellifer) family — alongside carrot, dill, fennel, cumin, and anise — remarkable for being one of the few plants where BOTH the leaves (called “cilantro” or “dhania patta”) AND the seeds (called “coriander” or “dhania”) are used as distinct culinary spices. Native to southern Europe and western Asia, coriander has been cultivated for over 8,000 years — seeds were found in the Neolithic level of ancient Israel (6000 BC), in Tutankhamuns tomb (1325 BC), in ancient Greek and Roman ruins, and in ancient Chinese medicine (Han dynasty, 200 BC). It was brought to India by ancient traders and is now deeply embedded in Indian cuisine. Today, India is the worlds largest producer, consumer, and exporter of coriander — major cultivation in Rajasthan (Kota, Baran, Jhalawar — the coriander bowl of India), Madhya Pradesh, Gujarat, Andhra Pradesh, and Telangana. The plant grows 30-80 cm tall, with bright green feathery leaves (the lower leaves are broad and flat-leaf parsley-like; the upper leaves are finely divided and feathery), small white-pink flowers in characteristic umbels, and small round ribbed beige-brown seeds (technically fruits that split into two halves). Coriander seeds contain 1-2% essential oil, mostly linalool, which gives them their characteristic warm, citrusy, slightly floral aroma — very different from the divisive soapy/lemony flavor of the fresh leaves (which some people love and others genetically cannot stand — the OR6A2 gene makes cilantro taste soapy to about 4-14% of people). Coriander seeds are essential to Indian cooking — they are the base of almost every curry (along with turmeric, cumin, and chili), the foundation of garam masala and sambar powder, used whole in pickles and chutneys, and ground into paste for marinades and curries. Fresh coriander leaves (dhania patta) are the most common Indian garnish — sprinkled over curries, dals, chaats, chutneys (the famous green chutney), raitas, soups, and biryanis. In Ayurvedic medicine, coriander is valued for digestion, as a diuretic, and as a cooling spice.
🧑🌾 Care requirements
Full sun to partial shade
Regular; keep evenly moist
Low to moderate (40-60%)
10-25°C
Well-draining loam; pH 6.0-7.5
Low-N; compost-enriched soil
📋 Plant facts
- 🌍 Origin
- Southern Europe and western Asia
- 📏 Max height
- 30-80 cm
- 📐 Spread
- 15-30 cm
- 🕰️ Bloom time
- Spring; small white-pink umbel clusters
- 🎨 Bloom color
- White to pale pink
- 🍃 Foliage color
- Bright green feathery leaves (lower flat-leaf; upper finely divided)
- ⏳ Lifespan
- Annual (1 season)
- 📈 Growth rate
- Fast — leaves in 30-45 days; seeds in 90-120
- ☠️ Toxicity
- Non-toxic in culinary amounts
- 🌱 Propagation
- Seeds (direct sow)
🛡️ Health & Safety
Non-toxic in culinary amounts
Common issues
- Bolting (going to seed in heat — most common issue), powdery mildew, bacterial leaf spot, coriander aphid, nematodes, root rot from waterlogging, leaf spot diseases in humid weather, flea beetles on seedlings
💡 Care tips
- Direct sow seeds in early spring (or autumn in hot regions) — coriander is a cool-season crop that bolts (goes to seed) quickly in heat. Sow seeds 1 cm deep, 5-10 cm apart, in rows 25-30 cm apart. Thin seedlings to 15-20 cm apart for seed production, 8-10 cm apart for leaf production. Crush seeds lightly before sowing to split the two halves and speed germination (germinates in 7-14 days). Plant in full sun in cool weather, partial shade in warm weather. Plant in well-draining, moderately fertile loam enriched with compost. Coriander tolerates a wide pH range (6.0-7.5). Water regularly — keep soil evenly moist (drought stress triggers bolting). Mulch to keep soil cool and moist. Coriander is a low feeder — too much nitrogen produces lush leaves but reduces seed yield. For continuous leaf harvest, sow small patches every 2-3 weeks through the cool season. For leaf harvest: begin harvesting outer leaves when plants are 15-20 cm tall, 30-40 days after sowing. Harvest leaves regularly to delay bolting — once the plant bolts (sends up a flower stalk), leaves become bitter and lacy. For seed harvest: allow plants to bolt and flower (45-60 days); seeds form 3-4 weeks after flowering; harvest when seeds turn from green to brown and start to drop from the umbels — cut entire seed heads into a paper bag and dry for 1-2 weeks; thresh and store in airtight containers. Save seeds for next planting — they remain viable for 1-2 years. Coriander flowers attract beneficial insects (lacewings, ladybugs, parasitic wasps) and is a great companion plant for vegetables — plant near tomatoes, peppers, spinach, and Brassicas. The plant is exceptionally easy to grow in containers — perfect for balconies, windowsills, and small gardens.