Marigold: Sow and Grow GuideUpdated 14 days ago

Marigolds are vibrant, easy-to-grow flowers that are perfect for adding color to your garden and repelling pests. Here's a concise guide to successfully sowing and growing marigolds.

When to Sow

Sow marigold seeds outdoors after the last frost when the soil has warmed to at least 60°F. For an earlier start, seeds can be sown indoors 4-6 weeks before the last frost and transplanted once the weather is consistently warm.

Outdoor Sowing

Choose a sunny location with well-drained soil. Sow seeds 1/4 inch deep and space them 6-12 inches apart, depending on the variety. Marigolds are not fussy about soil but will thrive in soil enriched with compost. After sowing, water gently and keep the soil consistently moist until germination, which typically takes 5-7 days.

Indoor Sowing

For indoor sowing, plant seeds 1/4 inch deep in seed trays or pots filled with a light, well-draining soil mix. Keep the soil moist and place the trays in a warm, sunny spot or under grow lights. Transplant seedlings outdoors once they have 2-3 sets of true leaves and the danger of frost has passed.

Care and Maintenance

Marigolds thrive in full sun and are drought-tolerant once established. Water regularly, especially during dry periods, but avoid waterlogging. Deadhead spent flowers to encourage continuous blooming throughout the season. Marigolds generally do not require fertilization, but a light application of a balanced fertilizer can be used sparingly if needed.

Pests and Diseases

Marigolds are known for their pest-repelling properties and are generally resistant to pests. However, they can sometimes attract aphids or spider mites. These can be managed with insecticidal soap or by introducing natural predators like ladybugs. Marigolds are also disease-resistant, but good air circulation and avoiding overhead watering can help prevent any fungal issues.

Harvesting

Marigolds can be harvested for cut flowers or dried for use in crafts. To harvest, cut the blooms when they are fully open using sharp scissors or garden shears. Regular harvesting will encourage more blooms to develop, prolonging the flowering season.

Garden Use

Marigolds are excellent for borders, containers, and companion planting, especially with vegetables like tomatoes and peppers. Their natural pest-repelling qualities make them a valuable addition to any garden, helping to deter harmful insects while attracting beneficial ones like bees and butterflies.

For further details, visit the full guide on the Botanical Interests Blog.