Allium giganteum seed

LATIN NAME: Allium giganteum

COMMON NAME: Giant Ornamental Onion

Giant ornamental onion is the tall, bold, ball-flowered onion of the gardens, and its great, round heads of the small, starry, lilac-purple flowers are one of the fine sights of the early summer border. The strong, upright stems rise from the broad, grey-green, onion-like leaves and carry the large, dense, round heads of the many small, star-shaped, lilac-purple flowers. The big, round heads are a fine, dramatic addition to the border, and they dry well for the winter arrangements. It is a generous, easy, sun-loving plant of the well-drained garden.

Scientific Research & Plant Biotechnology

Giant ornamental onion has a steady place in the plant science, and it has been studied for its bold, round flower heads and its place among the ornamental onions. The large, dense heads of the starry flowers and the way they draw in the bees and the butterflies have been studied closely, and the plant keeps showing up in the work on the pollinator plants and the ornamental bulbs. The broad, grey-green leaves and the strong, upright stems have also made it a fine garden plant, and it is a regular subject of the studies of the alliums and the showy border plants.

Ecological & Economic Value & Wide Applications

Giant ornamental onion is grown for the great, round heads of the flowers. The dense, lilac-purple, starry heads open through the early summer, and they pull in the bees, the butterflies and the hoverflies from all around. The big, round heads are a fine, dramatic addition to the border, and they dry well for the winter flower arrangements as well. It has been written about in the horticultural papers for its bold heads and its easy, pollinator-friendly ways, and it is a generous, easy plant of the sunny, well-drained garden.

The giant ornamental onion is a fine, generous plant of the sunny border, and the great, round heads of the starry, lilac-purple flowers are a dramatic sight of the early summer. The dense heads are a fine food for the bees, the butterflies and the hoverflies, and they dry well for the winter arrangements. The broad, grey-green leaves are a handsome clump at the base, and the plant is easy, dependable and long-lived.

The giant ornamental onion is a fine, easy plant for the sunny border, and the great, round heads of the lilac-purple flowers are a dramatic sight of the early summer. The plant is a dependable, long-lived addition to the garden.

To grow the giant ornamental onion from seed, sow the small, round, black seeds at a shallow depth in pots of moist, free-draining soil and cover them lightly, keep them in a bright, open spot and water gently. The seedlings are up within a couple of weeks and grow on into small bulbs in the first season. With the sun and the sharp, well-drained soil, the great, round, lilac-purple heads will be there in a couple of seasons.

NAME: Giant Allium ‘Globemaster’
SCIENTIFIC NAME: Allium Giganteum
COLOR: Purple 6 – 8” round flower heads
PLANT SEEDS: Outdoors after frost / Indoors weeks before last frost
BLOOM TIME: Late Spring – Mid Summer
HARDINESS ZONE: 4 – 9
PLANT HEIGHT: 36 – 48”
PLANT SPACING: 12 – 15”
LIGHT REQUIREMENTS: Sun
SOIL & WATER PREFERENCES: Average
OTHER: These flowers are absolutely huge! They measure a whopping 6 – 8″ wide! This variety of Allium makes an excellent dried flower. They are also a favorite of bees.