Its name - giganteum - is a good indication that this is one of the tallest of the allium species. Its leaves are striped blue-grey; unfortunately these are already withering back when the plant blooms. The ball-shaped inflorescence consists of more than 100 individual flowers and has a diameter of at least 8 inches (20 cm). Placing small groups of 3 to 5 bulbs amongst low-growing perennials (like hostas for instance) creates a very beautiful effect.
What You Need To Know Before You Plant:
When Will This Flower Bloom?
Very late Spring - Early Summer
When Should I Buy and Plant These Bulbs?
What Kind of Light Does This Bulb Prefer?
What Color Will the Flower Be?
How Far Apart Should I Plant These Bulbs?
8 in / 20 cm
How Deep Should I Dig?
8 in / 20 cm
How Tall Will It Grow?
60-70 in / 150-180 cm
Recommended Number of Bulbs Per Square Foot?
Is It Deer/Critter Resistant?
How Can I Best Use It in My Landscaping?
In borders, perennial gardens and as fresh cut- and dried flowers.
What Should I Do After Flowering?
It is normal that the foliage already starts to turn yellow/brown before the flowers have finished blooming. Let them die back naturally (to build up energy reserves within the bulb) and only remove the dead foliage once it has completely separated from the bulbs. You can either deadhead the finished blooms or allow them to dry and let the seeds be blown to other parts of your garden. Eventually they too will produce new alliums. Even the dried flowers are still quite decorative for a while and after 4-6 weeks you can easily pull them loose (don't force it) and bring them indoors as a dried bouquet. Leave the bulbs in the ground and fertilize them with bonemeal, bulb booster or 10-10-20 early every Spring when the foliage begins to emerge again. Divide and replant them early Fall after they become overcrowded (and flowering diminishes) after 8-10 years.
Other Popular Varieties
About the Family
Many hundreds of Allium species exist, but only a modest few have made a name for themselves as garden plants. The genus, Allium also includes important plants used for human consumption such as onions, leeks, shallots and the familiar cooking herb, chives.Read More About the Family