Calendula, also known as English marigolds or pot marigolds, are beloved for their vibrant blooms and ease of cultivation. Here's a comprehensive guide on how to grow Calendula from seed.
Latin Name: Calendula officinalis
Family: Asteraceae
Difficulty: Easy
Season & Zone Exposure: Full sun to partial shade
Timing: Direct sow in early spring, continuing every two to three weeks until early summer for fall flowers. Alternatively, start indoors in late winter and transplant when temperatures exceed 10°C (50°F). In Zones 8-10, direct sow in early autumn.
Starting: Sow seeds 5mm (¼”) deep, spacing them 15-45cm (6-18″) apart.
Growing Tips:
- Calendula thrives in regular garden soil with a pH range of 5.5-7.0.
- Encourage bushy growth by pinching back young plants.
- While occasional feeding can be beneficial, it's not necessary for robust growth.
- Ensure consistent watering, avoiding overhead watering to prevent mildew.
- Regular deadheading helps prevent self-sowing and encourages continuous blooming.
Companion Planting:
Calendula offers natural nematode repellent properties, making it an excellent companion for tomatoes and asparagus. However, be mindful that it may attract slugs.
By following these simple guidelines, you can enjoy the beauty and benefits of Calendula in your garden throughout the growing season.