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Nasturtiums are vibrant, easy-to-grow annuals that add bright color and edible leaves and flowers to your garden. In Zone 7, with its moderate climate, these plants thrive with proper care and attention. This guide provides essential tips on how to successfully grow and maintain nasturtiums in Zone 7 gardens.
Choosing the Right Nasturtium Varieties
There are two main types of nasturtiums: climbing and bush varieties. Climbing types, such as ‘Jewel of Africa,’ can grow up to 10 feet and are excellent for trellises and fences. Bush varieties, like ‘Alaska,’ stay compact and are perfect for containers and borders. Select varieties based on your garden space and aesthetic preferences.
Planting Nasturtiums in Zone 7
Plant nasturtiums in early spring after the danger of frost has passed. They prefer full sun but can tolerate partial shade. Choose well-draining soil enriched with organic matter. Sow seeds directly into the ground or containers, spacing them 10-12 inches apart. For quicker blooms, start seeds indoors 4-6 weeks before the last frost date.
Seed Sowing Tips
- Soak seeds in warm water for a few hours to improve germination.
- Plant seeds ½ inch deep into moist soil.
- Keep soil consistently moist but not waterlogged.
- Germination typically occurs within 7-14 days.
Care and Maintenance
Once established, nasturtiums require minimal care. Regular watering during dry spells encourages healthy growth. Mulching helps retain soil moisture and suppress weeds. Fertilize sparingly; excessive nutrients can lead to lush foliage with fewer flowers.
Watering
Water nasturtiums at the base of the plant, keeping the soil evenly moist. Avoid overhead watering to prevent fungal diseases. In Zone 7, natural rainfall often suffices, but supplemental watering may be needed during dry spells.
Pest and Disease Control
Nasturtiums are generally pest-resistant, but watch for aphids and slugs. Use organic pest control methods such as neem oil or insecticidal soap. Good air circulation and proper spacing help prevent fungal issues like powdery mildew.
Pruning and Deadheading
Regular deadheading encourages continuous flowering. Pinch back leggy stems to promote bushier growth. Remove any diseased or damaged leaves promptly to maintain plant health.
Overwintering and Longevity
In Zone 7, nasturtiums are typically grown as annuals. To extend their life, you can collect seeds at the end of the season and sow them the following spring. Alternatively, bring potted plants indoors before the first frost and place them in a sunny window to enjoy year-round.
Harvesting and Uses
The edible leaves and flowers of nasturtiums add a peppery flavor to salads, garnishes, and sandwiches. Harvest flowers regularly to encourage more blooms. Use young leaves for salads or as a colorful addition to platters.
Conclusion
Growing nasturtiums in Zone 7 is a rewarding experience that enhances your garden with vibrant color and edible delights. With proper selection, planting, and maintenance, these hardy plants will flourish throughout the growing season, providing beauty and culinary use for months to come.