Sonata Carmine Cosmos Seed
Sonata Carmine Cosmos Seed

Sonata Carmine Cosmos Seed

Price: $1.49

Quick Facts:

  • Packet Contains: 10 seeds
  • Plant Height: 24 inches
  • Life Cycle: Annual
  • Seed Type: Open-pollinated
Plant Features
The Sonata Carmine variety features rich, deep carmine blooms that provide a bold, dramatic touch to any garden. Its vibrant flowers create striking focal points in flower beds and containers. Known for its reliable blooming, it’s perfect for gardeners looking to add intense color and beauty throughout the growing season.

Cosmos Growing Guide

Indoor Sowing (Starting Seeds Indoors)

  • Timing: Start cosmos seeds indoors 4-6 weeks before the last expected frost date.
  • Containers: Use seed trays or small pots with good drainage, filled with a light, well-draining seed-starting mix.
  • Planting:
    • Sow seeds 1/4 inch deep and lightly cover with soil or compost to ensure good germination.
    • Firm the soil gently and mist with water to keep the growing medium evenly moist without waterlogging.
  • Germination:
    • Maintain a temperature of 65-70°F (18-21°C) for optimal germination.
    • Expect seedlings to emerge within 7-10 days.
  • Watering: Water gently to keep the soil consistently moist but not soggy. Avoid overwatering, as cosmos seeds are prone to rot in overly wet conditions.
  • Transplanting: Once seedlings have developed their first set of true leaves, transplant them into individual pots if needed. Harden off the seedlings by gradually exposing them to outdoor conditions for 7-10 days before planting them outdoors after the last frost date.

General Care Tips for Cosmos

  • Sunlight: Cosmos thrive in full sun and require at least 6-8 hours of direct sunlight daily for optimal growth and flowering.
  • Watering: Water young plants regularly until established. Once mature, cosmos are drought-tolerant and require only occasional watering during prolonged dry spells.
  • Fertilizing: Avoid over-fertilizing cosmos, as rich soil or excessive feeding can lead to lush foliage at the expense of blooms. Lightly enrich the soil with compost before planting if needed.
  • Pruning: Deadhead spent flowers regularly to encourage continuous blooming. Pinch back the growing tips when plants are young to promote bushier growth.
  • Pest and Disease Control: Cosmos are relatively pest- and disease-resistant. Proper spacing ensures good airflow, reducing the risk of fungal issues like powdery mildew.
  • Harvesting:
    • For Flowers: Harvest blooms when they are fully open for fresh arrangements. Cut stems just above a leaf node to encourage further flowering.
  • Storage: Fresh cosmos flowers last up to a week in water. Remove foliage below the waterline to keep the arrangement fresh longer.


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