Common Name: Ornamental onion
Genus: Allium
Species: hollandicum
Cultivar: 'Purple Sensation'
Skill Level: Beginner
Exposure: Full sun
Hardiness: Hardy
Soil type: Well-drained/light
Height: 100cm
Spread: 7cm
Time to divide plants: September to November
Flowering period:
June
to
July
The tall flowers of 'Purple Sensation' appear in summer, showing off rounded heads full of deep violet flowers. These alliums are perfect for a sunny border. It is best to remove the immature seed-heads as the seedlings tend to have paler flowers. The Royal Horticultural Society has given it its prestigious Award of Garden Merit (AGM) in recognition of its outstanding excellence.
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