Cilantro (also known as coriander leaf, dhania, or Chinese parsley) is one of the most-used fresh herbs in the world, essential to Mexican, Indian, Thai, West African, Levantine and Caribbean cooking. The catch: it bolts fast in heat, and most home growers give up after their first plant flowers within weeks. This guide shows you exactly how to keep cilantro producing leaves for months, whether you are growing on a windowsill, in a backyard garden, or in a commercial market-garden bed under shade.
1. Understand the plant first
The same plant (Coriandrum sativum) produces:
- Cilantro,the fresh green leaves, harvested young.
- Coriander seeds,the dried seeds, harvested when the plant flowers and sets seed.
Cilantro is a cool-season, short-lived annual. It grows fastest and best at 15 to 25 °C. Above 27 °C, it rapidly bolts (produces flowers) and stops making leaves. This is why so many tropical growers struggle with it, the same plant that grows for months in cool climates dies in weeks in hot ones.
2. When to plant
Temperate climates
- Spring and autumn are the main planting seasons.
- Skip summer or plant in partial shade.
- Direct sow after last frost.
Tropical and subtropical climates
- Plant during the coolest months of the year (in most of West and Central Africa, that is December to February).
- In hot months, grow only under 40 to 50 % shade cloth.
- Plant in a spot that gets morning sun and afternoon shade.
Succession planting (the real secret)
Because cilantro bolts fast, plant a new small batch every 2 to 3 weeks. This gives you continuous fresh leaves rather than one big harvest followed by drought.
3. Soil and site
- Soil: light, well-drained, loose. Cilantro has a taproot and dislikes compacted soil.
- pH: 6.2 to 6.8. Slightly acidic to neutral.
- Fertility: moderate. Too much nitrogen weakens flavour; too little stunts growth.
- Container growing: use a pot at least 20 cm deep. Cilantro dislikes being transplanted, so sow directly into the final container.
4. How to plant cilantro from seed
Cilantro is almost always grown from seed directly sown,it hates transplanting.
Preparing the seed
- Coriander seeds are actually two seeds fused inside one husk. For faster germination, gently crush each seed between your fingers to split it in two.
- Soak the seeds in room-temperature water for 24 to 48 hours before sowing. This dramatically improves germination speed and rate.
Sowing
- Rake the seedbed smooth.
- Sow seeds 1 cm deep, 5 cm apart, in rows 20 to 30 cm apart.
- Cover lightly with soil, firm gently.
- Water with a fine spray so seeds don’t wash away.
- Keep soil consistently moist until germination (7 to 14 days).
Thinning
Once seedlings are 5 cm tall, thin to one plant every 10 cm. Use the thinnings in the kitchen, they are edible.
5. Watering
- Cilantro needs consistent moisture, never soggy, never bone-dry.
- Water at the base, ideally in the morning.
- In hot weather, mulch with straw or dry grass to retain soil moisture and cool the roots.
- Drought stress accelerates bolting, a stressed plant flowers to make seeds before dying.
6. Fertilization
- Apply a light compost top-dressing 2 to 3 weeks after sowing.
- Avoid heavy nitrogen fertilizers, they produce lush but bland-tasting leaves.
- A balanced organic fertilizer (like well-composted manure) works better than synthetic NPK for herb flavour.
7. Preventing bolting (the number one problem)
Bolting is when the plant switches from producing leaves to producing flowers and seeds. Once it starts, leaf production stops.
- Grow in cool weather,the single most important factor.
- Provide afternoon shade in hot climates.
- Water consistently,moisture stress triggers bolting.
- Harvest often,regular cutting slows flowering.
- Choose slow-bolt varieties: ‘Slow Bolt’, ‘Calypso’, ‘Marino’, ‘Santo’ are bred to resist flowering in warm weather.
- Successional sowing,accept that any given plant will bolt in 4 to 8 weeks and plan for replacement.
8. Common pests and diseases
- Aphids: spray with a soap-water solution or introduce ladybugs.
- Fungal wilt: caused by wet leaves and poor air flow. Water at the base only, thin plants properly.
- Leaf spot: rotate cilantro plot every year; do not plant in the same spot repeatedly.
9. Harvesting cilantro
- Start harvesting when plants are 15 cm tall.
- Cut the outer leaves with scissors, leaving the central growth point intact, this allows the plant to keep producing.
- Never take more than one-third of the plant at once.
- Harvest in the morning when leaves are most aromatic.
- Use fresh within 3 days for best flavour. Store wrapped in a damp paper towel in the refrigerator.
- For long storage, freeze chopped cilantro in ice cube trays with a little water or olive oil.
10. Harvesting coriander seed
If you let one of your cilantro plants bolt, it produces coriander seeds. Wait until the seed heads turn brown but before they shatter, cut the stems, hang upside down over a paper bag in a dry spot for 2 weeks, then collect the fallen seeds.
11. Cilantro in a market-garden rotation
Cilantro is a valuable filler crop for market gardeners because it grows fast and sells at premium fresh-market prices. Interplant with slow-growing crops like okra or between rows of garlic to maximize bed use, and use green onions as a companion, the two are among the most complementary market-garden herbs. For hot-climate growers, a light shade structure is essential; our team can advise on shade nets and low tunnels.
12. Culinary uses that guide harvest timing
When and how you harvest cilantro should reflect how you plan to use it. Different dishes want different qualities:
- Fresh raw applications (guacamole, salsa fresca, chutney, pico de gallo): harvest young leaves, ideally under 8 weeks from sowing. Tender leaves have the brightest flavour.
- Cooked applications (curries, stews, egusi, jollof rice): can use slightly older leaves and stems. Cilantro stems have concentrated flavour and hold up well to heat.
- Garnish and finishing: chiffonade cut just before serving. Cilantro loses flavour fast once chopped, so cut at the last moment.
- Root harvest: Thai and Vietnamese cooking use cilantro roots (rau mui, phak chi rak) in pastes and stocks. If you’re growing for this purpose, uproot the whole plant just before it bolts.
- Seed (coriander): let a few plants flower and dry down. Whole coriander seeds have a very different flavour profile from the leaves, warm, citrusy, and toast-worthy.
13. Cilantro as a market-garden crop
For commercial growers, cilantro is one of the best return-per-square-meter herbs available. A well-managed 100 m² bed produces around 60 to 100 kg of fresh cilantro over a season, with market prices in urban markets typically ranging from $3 to $8 per kilogram fresh depending on region and season. Restaurants pay a premium for reliably supplied, clean, tightly bunched cilantro delivered same-day.
Cilantro pairs beautifully in market-garden beds with slower-growing crops like okra, garlic, and green onions, as an intercrop that finishes before the slower crop needs its bed space. For hot-climate growers ready to scale up commercial market gardening, our team can advise on shade nets and low tunnels that let you extend the cilantro season through the hottest months.
Article by the Jogoo Agriculture team. Cultivation data are typical values and should be adapted to your specific climate.
Frequently asked questions
How long does cilantro take to grow?
Cilantro is ready for first harvest 30 to 45 days after sowing. It produces leaves for another 4 to 8 weeks before bolting (flowering) and going to seed. Total useful life of a single plant is typically 2 to 3 months in cool weather, but only 4 to 6 weeks in hot weather.
Why does my cilantro keep bolting?
Cilantro bolts (produces flowers instead of leaves) when triggered by heat, long day-length, or moisture stress. To prevent bolting: grow during cool seasons, provide afternoon shade in hot climates, water consistently, harvest regularly, and choose slow-bolt varieties like ‘Slow Bolt’ or ‘Santo’. In tropical climates, plan on succession sowing every 2 to 3 weeks.
Can I grow cilantro indoors?
Yes. Use a pot at least 20 cm deep, place near a sunny window (6+ hours of light per day), and keep soil consistently moist. Indoor cilantro often lasts longer than outdoor cilantro because the temperature stays cooler and more consistent. Direct-sow into the final pot, cilantro hates transplanting.
Should I soak cilantro seeds before planting?
Yes. Coriander seeds are actually two seeds fused inside one husk. Gently crush each seed between your fingers to split it in two, then soak in room-temperature water for 24 to 48 hours before sowing. This can cut germination time from 14 days to 7 days and dramatically improves the germination rate.
How do you harvest cilantro so it keeps growing?
Cut the outer leaves and stems with scissors, always leaving the central growing point intact. Never take more than one-third of the plant at once. Harvest in the morning when leaves are most aromatic. Regular light harvesting actually slows bolting and encourages more leaf production, cilantro left un-harvested tends to flower faster.