Giant Allium Plants


Allium are related to onions. They grow from a bulb and often smell oniony if bruised or bent. There are numerous cultivars that vary in color, height and bulb size. The flowers only bloom for a couple of weeks, but make interesting dried presentations indoors and out. Allium flowers comprise many small florets that make up a globe. Allium are best planted in full sun and are easy to grow and hardy in all but the coldest zones.

Giant Allium

  • Giant allium is the granddaddy of all allium. It is a huge variety that grows up to 6 feet tall. Giant allium blooms in May to June and has a lavender ball flower. The flower grow to the size of a softball. The seed heads make impressive displays on their own, after the florets die back. Another allium variety, White Giant, is the same size.

Globemaster Allium

  • Globemaster is a cultivar of the giant flowering onion or giant allium. It has been improved to have a deeper purple color, longer bloom time and higher floret count. It produces a tighter ball than the giant allium. The foliage dies back on the plant as the flower blooms.

Star of Persia

  • Star of Persia has the largest flower head among alliums, but it is set on stems only 2 1/2 feet tall. The flowers grow to between 8 to 12 inches across and are made up of silvery lavender florets. The flowers are spiky and looser than giant allium.

Schubert's Garlic

  • The height of this plant isn't spectacular. It only grows 2 feet high, but it carries a flower head that is huge. The flower is loose and starry with pink and green florets. The flower can be nearly a foot across. The flowers are unusual and resemble sparklers.

Ivory Queeen

  • Ivory Queen is a white allium with 6-inch blooms. It has a compact head in a perfect round ball. The leaves are wide and blue-green. The height is medium, reaching 10 inches tall. The bright white balls show well against the unique foliage.

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