Marigold (French)

📖 About This Plant

Marigold (French) — Tagetes patula — is far more than a pretty face in the vegetable garden: it is a functional companion planting tool backed by actual research showing its roots release a chemical called alpha-terthienyl that suppresses populations of root-knot nematodes in the surrounding soil. French marigolds are the compact, bushy type (6–12 inches tall) as opposed to the towering African marigolds, making them well-suited for edging garden beds without shading neighboring vegetables. The flowers bloom in rich shades of orange, yellow, and bicolor red-orange from early summer through hard frost — a longer season than almost any other annual. They attract beneficial insects including ladybugs and parasitic wasps that prey on aphids and caterpillars. The dried petals are edible, mildly flavored, and used as a saffron substitute in Eastern European and Georgian cooking.

📊 Quick Facts

📅 When to Plant in Your Area

🌱 Care Tips

For nematode suppression, plant French marigolds densely across the entire bed (4–6 inches apart) and grow them for a full season, tilling them in at the end — partial plantings provide partial results. As ornamentals in vegetable garden borders, space 6–10 inches apart for a full, bushy effect. Start seeds indoors 4–6 weeks before last frost, or direct sow outdoors after frost in warm soil. French marigolds germinate fast (5–7 days) and are virtually foolproof from seed. Transplant outdoors after frost, hardening off for a week before full sun exposure. Feed lightly with a balanced fertilizer at planting; overfeeding with nitrogen produces lush foliage and few flowers. Water at the base — overhead watering promotes botrytis on the flowers. Deadhead spent blooms regularly to maintain continuous flowering; if you stop deadheading, the plant stops blooming and puts energy into seed production. French marigolds tolerate light frost, often continuing to bloom weeks after the first cold snaps of fall. Collect seeds from dried flower heads for free plants next year.

🤝 Companion Plants

These plants grow well alongside Marigold:

🌿 Related Flower

More flower that grow in similar conditions:

❓ Frequently Asked Questions