How to Sow Super Green Coriander Seeds in the UK

Super Green Coriander, also known as Chinese parsley or cilantro, is a versatile herb used for its fragrant leaves and seeds. While “cilantro” refers to the leaves, coriander typically describes both the leaves and seeds, which are dried and used in cooking, salads, or drinks. Coriander is a great addition to herb gardens and is perfect for year-round indoor growing, providing fresh leaves for culinary use.

When to Sow Super Green Coriander Seeds

• Indoor Sowing: Coriander seeds can be sown indoors year-round in the UK, making it an excellent option for continuous harvesting. Use pots, containers, or window boxes placed on a sunny windowsill or in a conservatory.
• Outdoor Sowing: For outdoor growing, sow coriander seeds from late spring to early autumn (April to September) once the risk of frost has passed. Outdoor-grown coriander thrives in warm weather but may bolt in extreme heat or if left too dry.

Step-by-Step Guide to Sowing Super Green Coriander Seeds Indoors

1. Prepare Containers: Use pots, containers, or window boxes filled with a high-quality, well-draining compost. Make sure the containers have drainage holes to prevent waterlogging.
2. Sowing Depth: Sow the coriander seeds about 1/4 inch (6 mm) deep. Cover them lightly with soil and gently water to keep the compost moist but not waterlogged.
3. Germination Conditions: Keep the containers in a sunny spot, maintaining a temperature of 18-22°C (65-72°F). Coriander seeds typically germinate within 7 to 14 days under optimal conditions.
4. Growing Indoors: Coriander will continue to grow indoors on a windowsill or in a conservatory, producing fresh leaves throughout the year. Ensure the soil remains moist but avoid overwatering, as this can cause root rot.

Transplanting Super Green Coriander Outdoors

1. Acclimatisation: If you started your coriander seeds indoors, gradually acclimatise the plants before moving them outside. Harden them off by placing the containers outdoors for a few hours each day, increasing exposure over a week.
2. Soil Preparation: Choose a sunny or partially shaded location with well-drained, fertile soil. Coriander prefers neutral to slightly alkaline soil (pH 6.5-7.5).
3. Transplanting: Once the seedlings are about 3-4 inches tall and have several leaves, transplant them into their final outdoor growing position. Space the plants 9-12 inches apart to allow for full growth.

Caring for Super Green Coriander Plants

1. Watering: Keep the soil consistently moist but well-drained. Avoid both overwatering and dry spells, as coriander is prone to bolting if stressed by extreme conditions.
2. Sunlight: Coriander grows best in full sun but can tolerate partial shade. Aim for at least 6 hours of sunlight daily for optimal growth.
3. Feeding: Coriander is a relatively low-maintenance herb, but applying a light, balanced fertiliser once during the growing season can encourage healthy leaf production.
4. Preventing Bolting: To prevent coriander from bolting (going to seed too early), keep the soil evenly moist and harvest leaves regularly. In hot weather, providing some afternoon shade can help reduce the risk of bolting.

Harvesting and Using Super Green Coriander

1. Harvest Time: Coriander can be harvested 6 to 8 weeks after sowing. Begin harvesting when the plants are around 6 inches tall by cutting the outer leaves first. Continuous harvesting will encourage further growth.
2. Using Coriander Leaves: Fresh coriander leaves can be used in salads, garnishes, or a variety of dishes. They are best used immediately after harvesting but can be stored in the fridge for up to a week.
3. Harvesting Seeds: If you allow the coriander to flower and produce seeds, you can harvest the seeds once they turn brown and dry. These can be used whole or ground in cooking or stored for future planting.

Common Questions About Growing Super Green Coriander in the UK

• Can coriander grow indoors year-round in the UK? Yes, coriander grows well indoors year-round, provided it receives enough sunlight and is kept in well-draining soil.

• How do I prevent coriander from bolting? Regular watering, avoiding dry spells, and harvesting leaves frequently will help prevent bolting. In hot weather, providing some shade can also help.

• How tall does Super Green Coriander grow? Fully mature coriander plants typically reach a height of 18-24 inches (45-60 cm), making them a great option for both indoor and outdoor growing.

By following these steps, you can enjoy a consistent supply of fresh coriander throughout the year, whether grown indoors or outdoors in your UK garden. This versatile herb is a must-have for any culinary enthusiast.

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