Allium Globemaster Seeds - Flower Plant

Allium ‘Globemaster’ is a large ornamental onion known for its tall stems and spherical flower heads composed of numerous small florets. It develops strap-like foliage at the base and produces prominent purple globe-shaped blooms during the late spring to early summer period. This plant adapts well to temperate climates and performs best in full sun with well-drained soil. It is commonly used in borders, garden beds, and landscape planting, where it adds vertical structure. Seeds establish gradually and may require patience, as this variety is typically slow to reach flowering maturity.

Features

• Upright perennial with tall flowering stems
• Produces large, spherical purple flower heads
• Suitable for borders and landscape planting
• Adapted to temperate climates and sunny conditions
• Slow establishment from seeds

Specifications

• Scientific name: Allium spp. (Globemaster cultivar)
• Common name (US): Ornamental Onion
• Seed type / variety: Globemaster variety
• Growth habit: Upright, bulb-forming perennial
• USDA zones: 5-8
• Planting season: Fall or early spring
• Growing season: Spring to early summer
• Sowing Season:
  • Fall: September to November
  • Early Spring: February to March
• Germination time and conditions: 2-6 weeks; may benefit from cold stratification
• Sunlight requirements: Full sun
• Soil requirements: Well-drained, moderately fertile soil
• Watering needs: Moderate; avoid waterlogging
• Mature plant size: 60-120 cm height, 30-45 cm spread
• Plant spacing: 20-30 cm between plants