How to Grow Culantro from Seeds

Looking for a fragrant herb that enjoys warm weather and a little shade? Culantro (Eryngium foetidum), also known as recao or sawtooth coriander, produces long, toothed leaves with a bold, cilantro-like flavor. It is popular in Caribbean, Latin American, and Southeast Asian cooking.

Culantro is not the same plant as cilantro. Its seeds can be slow and uneven to sprout, but steady moisture, warmth, and patience make a big difference. Here is how to get started.

1. Choose a Warm Spot with Partial Shade

Culantro grows well in warm, frost-free conditions. Choose a location with morning sun and afternoon shade, or bright filtered light. Partial shade is especially helpful in hot climates and can help keep leaves tender and delay flowering.

Use fertile, well-drained soil enriched with finished compost. For containers, choose a pot with drainage holes and a good-quality potting mix. Avoid dense garden soil in pots.

2. Prepare a Seed Tray

Fill a shallow tray or small pots with a fine-textured seed-starting mix. Moisten the mix before sowing and let excess water drain. The surface should be damp, not muddy.

Culantro seeds are tiny, so sowing in a tray makes moisture and seedling care easier to manage. 

3. Sow Seeds on the Surface

Sprinkle culantro seeds thinly over the surface of pre-moistened seed-starting mix, then gently press them down so they make contact with the soil. Don’t bury them deeply, since light helps germination.

Mist gently to settle the seeds without washing them away and keep the surface consistently moist, not soggy. Routine soaking is not necessary for these small seeds.

4. Keep Warm and Consistently Moist

Aim for a growing-medium temperature around 75–85°F. Keep the tray in bright, indirect light, away from harsh direct sun. If your room is cool, a seedling heat mat with a thermostat can help maintain warmth.

A clear humidity cover can reduce drying before germination. Vent it regularly and remove it as seedlings emerge. Never leave a covered tray in direct sun, where it can overheat.

Keep the surface consistently moist with gentle misting or careful bottom watering, then drain excess water. Do not allow the tray to sit continuously in water.

5. Be Patient with Germination

Culantro often takes about 2–4 weeks to germinate, and some seeds may take longer. Emergence can be uneven, so do not discard a tray simply because other herbs have already sprouted.

Use fresh seed when possible. If germination is slow, check warmth and surface moisture rather than digging up the seeds or adding fertilizer.

6. Care for Young Seedlings

Once seedlings appear, provide bright light and good airflow while protecting them from intense midday sun. Keep the mix evenly moist without making it soggy.

Do not fertilize immediately when the first seed leaves appear. Once seedlings develop 2–3 true leaves, those in an unfertilized seed-starting mix may benefit from a diluted liquid fertilizer labeled for edible herbs or vegetables. Follow the label's seedling directions. If the mix already contains fertilizer and seedlings look healthy, wait before feeding.

Avoid applying fertilizer to dry roots, and remember that more fertilizer does not mean stronger seedlings.

7. Thin or Transplant Carefully

When seedlings have several true leaves and roots hold the mix together, move them into individual pots or their final growing space. Handle them gently and avoid damaging the roots.

If moving plants outdoors, gradually introduce them to outdoor conditions over about a week. Wait until frost danger has passed and temperatures are reliably warm.

Space plants roughly 6–10 inches apart, adjusting to your seed packet's recommendations. Leave room for the low rosettes of leaves to spread.

8. Maintain Moisture and Remove Flower Stalks

Water when the soil surface begins to dry, keeping the root zone evenly moist. Containers may need more frequent checks during warm weather. A light mulch around established plants can help retain moisture; keep it away from the crown.

Feed established plants only as needed, using a fertilizer labeled for edible herbs according to its directions. If your goal is leaf production, snip off flower stalks as they develop. Partial shade can help delay flowering, but it will not prevent it indefinitely.

9. Harvest Outer Leaves First

Depending on conditions, a first light harvest may be possible around 10–14 weeks after sowing, sometimes later. Let plant size guide you: wait until each plant has a healthy rosette and enough leaves to spare.

Use clean scissors to cut a few mature outer leaves near their base. Leave the central growing point and plenty of foliage intact so the plant can keep growing. Avoid stripping a young plant bare.

Rinse harvested leaves before use. Culantro has a strong flavor, so start with a small amount in soups, stews, marinades, or sofrito and adjust to taste.

Common Growing Problems

• Few or no sprouts: Check seed freshness, warmth, moisture, and planting depth. Deep burial can reduce germination.
• Seedlings collapse at soil level: Excess moisture and poor airflow can encourage damping-off. Use clean containers, fresh starting mix, and good drainage.
• Leaves scorch or plants wilt: Check soil moisture and provide protection from intense afternoon sun.
• Plants flower early: Provide partial shade, avoid moisture stress, and remove developing flower stalks if you want more leaves.
• Leaves turn yellow: Check drainage, watering, and root crowding before assuming fertilizer is needed.

Small Seeds, Big Flavor

The secret to growing culantro is a gentle start: surface-sow the tiny seeds, keep them warm and moist, and give them time. Once established, a few well-tended plants can provide flavorful leaves for your favorite recipes.

Happy growing from Zenn Garden Bliss!