Calendula Seeds,
Ball's Improved Orange

Ball's Improved Orange calendula thrives in cooler weather, making it suitable for planting in early spring or fall. Seeds can be started indoors 6-8 weeks before the last frost and transplanted outdoors once the danger of frost has passed. Alternatively, they can be sown directly into the garden after the last frost date. In warmer climates, it can be grown as a winter annual. If you’re not sure how to find your first and last frost dates, consult our blog post 'Our Experts Answer Questions, Share Resources.'

Sow seeds 1/4 inch deep, either directly into the garden or in seed trays if starting indoors. Maintain a soil temperature of around 65-70 F for optimal germination, which usually happens within 7-14 days. Space the plants about 10 inches apart to ensure good air circulation and reduce the risk of fungal diseases​.

Calendula grows best in full sun but can tolerate partial shade. It prefers well-drained, moderately fertile soil. Regular watering is necessary to keep the soil moist but not waterlogged. To encourage bushier growth and more blooms, pinch out the growing tips when the plants are about 10 inches tall. Deadheading spent flowers will also promote continuous blooming throughout the growing season.

Plants easily self-sow the following spring. If growing more than one variety of calendula, you will need to isolate by 1/4 mile from any other calendula varieties, or you can use caging techniques. Seeds are easy to save; the heads turn brown and seeds can easily be harvested in fall. Keep in a cool, dry, dark place until next spring.