• Dark Blue Nasturtium in Cottage Garden Display
  • Dark Blue Nasturtium Flower Seeds for planting
  • Dark Blue Nasturtium in Cottage Garden Display
  • Dark Blue Nasturtium in Cottage Garden Display
  • Dark Blue Nasturtium in Cottage Garden Display
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EdenValleySeeds

Dark Blue Nasturtium Flower Seeds for Planting – Heirloom Non-GMO Garden Seeds

Dark Blue Nasturtium Flower Seeds for Planting – Heirloom Non-GMO Garden Seeds

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$18.89 USD
$18.89 USD
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DELIVERY ESTIMATE
Oct 21 – Oct 23 Estimated arrival
ORDER Oct 11 Order placed
ORDER READY Oct 13 – Oct 14 2–3 business days
DELIVERED Oct 21 – Oct 23 10–12 business days total
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Grow Dark Blue Nasturtium from heirloom non-GMO seeds for an unusual floral color and distinctive rounded foliage. Ideal for containers, cottage gardens, borders, hanging baskets, patios, and ornamental garden displays.

Key Features

  • Marketed for distinctive dark blue-toned ornamental flowers.
  • Features rounded, shield-shaped green foliage.
  • Heirloom, non-GMO seeds for home garden growing.
  • Suitable for containers, hanging baskets, borders, raised beds, and cottage gardens.
  • Performs best in full sun to partial shade.
  • Adds unusual color and visual interest to garden spaces.

Growing Benefits

  • Adds distinctive color to ornamental plantings.
  • Trailing growth can create attractive displays in hanging baskets and containers.
  • Suitable for patios, balconies, raised beds, and small garden spaces.
  • Flowers can provide seasonal interest for pollinator-friendly gardens.
  • Compact or trailing growth can complement mixed flower arrangements.

Seed Specifications

  • Common Name: Nasturtium, Garden Nasturtium
  • Botanical Name: Tropaeolum majus
  • Plant Type: Annual flowering plant
  • Flower Color: Dark blue-toned color as marketed; verify the supplied cultivar because true blue is uncommon in Tropaeolum majus
  • Flower Shape: Five-petaled, funnel-shaped flowers
  • Foliage: Rounded, shield-shaped green leaves
  • Growth Habit: Trailing, spreading, climbing, or compact depending on variety
  • Sunlight: Full sun to partial shade
  • Soil: Loose, moderately fertile, well-drained soil
  • Water: Moderate; maintain moisture during establishment
  • Germination Time: Approximately 7–14 days under favorable conditions
  • Sowing Depth: Approximately ½–1 inch
  • Spacing: Approximately 8–12 inches
  • Growing Zones: Generally grown as an annual in USDA Zones 2–11
  • Flowering: Summer through fall, depending on climate and growing conditions
  • Uses: Cottage gardens, borders, containers, hanging baskets, raised beds, patios, and ornamental displays

Growing Tips

  • Direct sow seeds outdoors after the danger of frost has passed.
  • Soak seeds briefly before sowing to help soften their firm seed coat.
  • Choose a sunny location with loose, well-drained soil.
  • Avoid excessive nitrogen fertilizer, which can encourage foliage rather than flowers.
  • Provide room for trailing or spreading growth.
  • Remove faded flowers to maintain a tidy appearance and encourage additional blooms.

Seed Storage

Store unused seeds in a cool, dry, dark location. Keep them sealed in their original packet or an airtight container away from moisture, heat, and direct sunlight.

Important Growing Note

True dark-blue flowers are not typical of Tropaeolum majus. Common nasturtium flower colors include yellow, orange, red, cream, and related shades. If this product is being sold as “Dark Blue Nasturtium,” verify the actual seed species and cultivar before making specific claims about flower color.

Unique Facts

  • Nasturtium belongs to the Tropaeolaceae family.
  • Its rounded leaves have a distinctive shield-like appearance.
  • Nasturtium flowers are frequently visited by bees and other beneficial insects.
  • Culinary nasturtium varieties can have edible flowers and young leaves with a peppery flavor.

Growing Instructions

Planting Season: Sow outdoors in spring after the danger of frost has passed and the soil has warmed. In warm climates, sow during a suitable cooler growing period.

Sowing: Prepare loose, well-drained soil and sow seeds directly where plants will grow. Direct sowing helps minimize root disturbance.

Depth: Plant seeds approximately ½–1 inch deep and cover lightly with soil.

Spacing: Space plants approximately 8–12 inches apart, allowing additional room for trailing or spreading growth.

Sunlight: Provide full sun for strong flowering. Partial shade can be beneficial in hot climates.

Soil: Use loose, moderately fertile, well-drained soil. Avoid excessively rich soil, which may produce abundant foliage with fewer flowers.

Watering: Keep soil evenly moist during germination and early growth. Once established, water when the upper soil begins to dry.

Germination: Seeds commonly germinate within approximately 7–14 days under favorable conditions. Temperature, moisture, and seed freshness can affect germination speed.

Thinning: Thin crowded seedlings after emergence to provide sufficient room for healthy growth and airflow.

Fertilizing: Nasturtiums generally need little fertilizer in moderately fertile soil. Avoid excessive nitrogen.

Care: Keep weeds controlled around young plants and provide adequate space for spreading or trailing growth.

Flowering/Maturity: Plants generally flower during the warmer growing season and may continue into fall under favorable conditions.

Deadheading: Remove faded flowers to encourage continued flowering. Leave selected flowers to mature if collecting seeds.

Seed Collection: Allow mature seed pods to dry naturally on the plant. Collect dried seeds and store them properly.

Container Growing: Grow in containers with drainage holes and a well-drained potting mix. Trailing types work especially well in hanging baskets.