Plant allium bulbs from September to December. If needed, keep them in their open packets somewhere cool, dry and well ventilated until planting.
Allium 'Chicago' is a dependable and characterful addition to the late spring garden, offering a confident display of vibrant purple flower heads that hover neatly above the foliage. Each bloom forms a well-proportioned half-globe, densely packed with tiny star-like florets that together create a rounded head of around 10cm across. There is a pleasing solidity to Allium 'Chicago', its upright stems holding each flower with quiet assurance. As Allium 'Chicago' comes into its own, it introduces both colour and structure at a moment when borders are beginning to find their rhythm.
Planted in autumn and returning reliably year after year, Allium 'Chicago' is particularly effective through the middle of a sunny border, where its bold yet balanced form can rise through softer planting. The blooms of Allium 'Chicago' are not only garden-worthy but also superb for cutting, retaining their shape and colour beautifully whether used fresh or dried. Despite its polished appearance, Allium 'Chicago' asks for very little beyond well-drained soil and a bright, open position. Grouped in drifts or dotted with intention, Allium 'Chicago' lends a sense of structure and cohesion that feels both natural and carefully considered.
Quantity
Plant profile
Plant calendar
Choose full sun or partial shade. Improve heavy soil with organic matter and horticultural grit. For containers, use peat-free multipurpose compost with good drainage.
Plant bulbs pointed side upwards, two to three times their own height deep. A slightly flattened side is perfectly normal and nothing to worry about.
Space small bulbs around 5cm apart. Larger bulbs need more room, generally around twice their own width apart, so their foliage and flowers can develop freely.
Water after planting if the soil is dry, then only when needed. After flowering, allow the foliage to die back naturally. Decorative seedheads can remain in place.
- Botanical name
- Allium 'Chicago'
- Flower colour
- Purple
- Bulb size
- 12/+
- Established height
- 70cm-1m
- Established spread
- 20-30cm
- Growing skill
- Easy to grow
- Habit
- Upright
- Hardiness
- Fully hardy
- Leaf colour
- Green
- Mouse resistant
- Yes
- Plant spacing
- 60 bulbs per m2
- Pollinator friendly
- Yes
- Position
- Sheltered
- Rabbit resistant
- Yes
- Scented
- No
- Soil acidity
- Any
- Soil moisture
- Free draining
- Soil type
-
Loam
Sandy
Clay
Stony
Multipurpose compost - Suitable for
-
Large containers
Borders
Gravel gardens
Wildlife gardens
Cottage gardens
Low maintenance gardens
Cut flower gardens - Sunlight
- Full sun
- Toxicity
- Skin/eyes irritant
- Years to establish
- 1st year
Allium 'Chicago' reviews
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Expert care from
choice to delivery
Our horticulturalists prepare every bulb and plant with the utmost care. From selection to packing, each one receives expert attention before beginning its journey to your garden.