When to Plant Calendula Seeds: Timing Guide for Success

Planting Windows by Climate Zone

In cooler climates (Zones 3-7), sow seeds outdoors after the last frost in spring. In warmer climates (Zones 8-11), calendula can be sown in the fall for winter and spring blooms. Successive sowings every 2-3 weeks will ensure a continuous harvest.

Indoor vs. Outdoor Starting

Starting seeds indoors 6-8 weeks before the last frost can give you a head start on the season. Direct sowing outdoors is also a great option, especially in milder climates. Calendula seeds are easy to handle and germinate quickly, making them ideal for beginner gardeners.

Germination Tips

Calendula seeds need darkness to germinate, so plant them about 1/4 inch deep. Keep the soil consistently moist until the seeds sprout, which usually takes 7-14 days. The ideal soil temperature for germination is between 60-70°F (15-21°C).

Transplanting Advice

If you started seeds indoors, harden off the seedlings for a week before transplanting them outdoors. Transplant seedlings when they have at least two sets of true leaves. Space plants about 8-12 inches apart to allow for good air circulation.

Our Medicinal Seed Kit includes a generous packet of calendula seeds, so you can experiment with different planting times and techniques. Ready to get your hands dirty? Grab our Medicinal Seed Kit and start planning your calendula garden today!