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Spring is an exciting time for gardeners in Zone 5, especially when it comes to growing fresh herbs like cilantro. Although cilantro is a cool-season herb, with proper planning, you can enjoy a lush harvest starting in March. This guide will walk you through the best practices for growing cilantro in early spring in Zone 5.
Understanding Cilantro and Zone 5 Climate
Cilantro, also known as coriander, thrives in cool weather. Zone 5 experiences cold winters and mild springs, making early planting a challenge but also an opportunity for a successful crop with the right techniques. Cilantro prefers temperatures between 50°F and 85°F and tends to bolt or go to seed quickly in hot weather.
Preparing for Planting in March
Before planting cilantro outdoors, prepare your garden beds by ensuring well-draining soil rich in organic matter. You can improve your soil by adding compost or aged manure. Since March can still be chilly, consider starting cilantro seeds indoors or in a protected outdoor space.
Starting Seeds Indoors
Use seed trays or small pots filled with seed-starting mix. Sow cilantro seeds about 1/4 inch deep and keep the soil consistently moist. Place the containers in a warm, bright location or under grow lights. Germination typically occurs within 7-10 days.
Direct Sowing Outdoors
If the weather forecast predicts daytime temperatures above 50°F, you can sow cilantro directly into your garden. Sow seeds 1/4 to 1/2 inch deep, spacing them about 6 inches apart. Cover lightly with soil and water gently. Protect young seedlings from late frosts with row covers or cloches.
Caring for Your Cilantro Plants
Once established, cilantro requires consistent moisture and full sun to partial shade. In early spring, providing some afternoon shade can help prevent bolting caused by rising temperatures. Mulching around plants helps retain soil moisture and suppress weeds.
Watering and Fertilizing
Water cilantro regularly to keep the soil evenly moist but not waterlogged. A balanced, water-soluble fertilizer applied every few weeks encourages healthy growth. Avoid over-fertilizing, which can promote excessive leaf growth and bolting.
Managing Pests and Diseases
Watch for aphids, whiteflies, and leaf miners. Use insecticidal soap or neem oil as organic controls. Ensure good air circulation and avoid overhead watering to prevent fungal diseases like powdery mildew.
Harvesting Cilantro in March
You can begin harvesting cilantro leaves once plants are about 4-6 inches tall. Regular harvesting encourages bushier growth. Use scissors to snip outer leaves, leaving the inner plant to continue growing. For seed production, allow some plants to flower and go to seed.
Extending the Growing Season
To extend your cilantro harvest into late spring and early summer, consider using cold frames, row covers, or small greenhouses. These protect plants from late frosts and help maintain cooler temperatures to prevent bolting.
Conclusion
Growing cilantro in March in Zone 5 is achievable with a little preparation and care. Starting seeds indoors and protecting outdoor plants from cold snaps can lead to a fresh supply of this aromatic herb early in the season. With patience and proper techniques, your garden can yield vibrant cilantro leaves just in time for spring dishes.