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Globemaster Ornamental Onion

Category:

Lovely green stalks presenting balls of silvery-purple flowers stand high above low mounded foliage during late spring and early summer; excellent accent feature in arrangements, containers, and garden beds; easy to grow and low maintenance

Characteristics

Other Species Names:
Flowering Onion
Average Landscape Height:
12 inches (3 feet with the flowers)
Average Landscape Width:
12 inches
Genus:
Allium
Cultivar:
Globemaster
Branching:
herbaceous
Plant Form:
over mound
Canopy:
low
Density:
open
Growth Rate:
medium
Pruning:
prune after flowering
Flower Color:
purple
Flower Bicolor:
silver
Flower Fragrance:
medium
Flower Period:
from late spring to early summer
Summer Foliage Color:
green
Maximum Light:
full sun
Minimum Light:
full sun
Maximum Moisture:
moist
Minimum Moisture:
average
Pollution Tolerance:
high

Ornamental Features

Globemaster Ornamental Onion features bold balls of lightly-scented purple flowers with silver overtones at the ends of the stems from late spring to early summer. The flowers are excellent for cutting. Its sword-like leaves remain green in color throughout the season.

Landscape Attributes

Globemaster Ornamental Onion is an open herbaceous perennial with tall flower stalks held atop a low mound of foliage. Its relatively coarse texture can be used to stand it apart from other garden plants with finer foliage.

Planting & Growing

Globemaster Ornamental Onion will grow to be about 12 inches tall at maturity extending to 3 feet tall with the flowers, with a spread of 12 inches. It grows at a medium rate, and under ideal conditions can be expected to live for approximately 5 years. As an herbaceous perennial, this plant will usually die back to the crown each winter, and will regrow from the base each spring. Be careful not to disturb the crown in late winter when it may not be readily seen! As this plant tends to go dormant in summer, it is best interplanted with late-season bloomers to hide the dying foliage.

This plant should only be grown in full sunlight. It does best in average to evenly moist conditions, but will not tolerate standing water. It is not particular as to soil type or pH, and is able to handle environmental salt. It is highly tolerant of urban pollution and will even thrive in inner city environments. This particular variety is an interspecific hybrid. It can be propagated by multiplication of the underground bulbs; however, as a cultivated variety, be aware that it may be subject to certain restrictions or prohibitions on propagation.

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