Cosmos 'Cosmic Red': Intense Scarlet Blooms for Sunny Spots

When you need a bold punch of color at the front of the border or in a container, Cosmos sulphureus 'Cosmic Red' delivers. This compact, heat-loving annual produces intense scarlet-red flowers with striking yellow centers from early summer through fall. The color deepens and becomes even more hypnotic as light levels increase, making it a standout in the hottest part of the garden.

Key Features

• Compact habit: Grows just 6–12 inches tall and wide.
• Long bloom season: Flowers continuously all summer.
• Wildlife appeal: Butterflies adore the nectar-rich blooms.
• Toughness: Moderately drought and heat tolerant once established.

Growing Requirements

Plant in full sun with moderately fertile, moist but well-drained soil. Deadhead regularly to keep the show going, but leave a few seed heads if you'd like it to self-sow. Sow seeds directly in late spring or start indoors at 61°F in mid-spring.

Potential Pests & Diseases

Stem canker, powdery mildew, Rhizoctonia stem rot, gray mold, and aphids are the main concerns. Good cultural practices minimize most issues.

Quick Facts