allium millennium

Generated on November 28, 2025 at 6:41 PM

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🌿 View Plant Facts
scientific name
Allium 'Millennium'
common names
allium 'Millennium'
family
Amaryllidaceae
height cm
10-50
spread cm
10-50
height cm extracted
40
spread cm extracted
5
hardiness zone
H6
sun exposure
Full sun
soil type
Chalk, Clay, Sand
moisture
Well-drained
soil ph
Acid, Alkaline, Neutral
foliage type
Deciduous
aspect
South-facing, West-facing
seasonal interest
Spring, Summer, Autumn
habit
Clump-forming
plant type
Bulb
time to maturity
2-5 years
suggested uses
Beds and borders, Cottage/Informal, Flower arranging, Ground cover, Underplanting
garden uses
Ground cover, City and courtyard gardens
fragrant
Yes
pollinator friendly
Yes
low maintenance
No
drought tolerant
No
seasonal colours
Mar, Apr, May, Green, Jun, Jul, Aug, Green, Pink, Sep, Oct, Nov, Green, Dec, Jan, Feb
flowering months
Jun, Jul, Aug
flower colour
Pink
cultivation
Grow in reasonably fertile, well-drained soil with full sun. The leaves generally die down before the flowers open. See allium cultivation advice
pruning
No pruning required, other than to remove old flowered stems and foliage
propagation
Propagate by division or propagate by offsets which can be carefully detached by lifting the bulb after flowering has finished. See bulb propagation
pests
May be susceptible to allium leaf miner and onion fly
diseases
May be susceptible to onion white rot, and onion downy mildew
description
Clump-forming bulbous perennial to 40cm tall, with thick, narrow mid-green leaves, and pompoms of rose-pink, star-shaped flowers to 5cm across on upright stems, in mid-to late summer
rhs url
https://www.rhs.org.uk/plants/315303/allium-millennium/details
rhs image url
https://apps.rhs.org.uk/plantselectorimages/detail/Web_Use-_KOT0910_13177.jpg
rhs image copyright
RHS / Joanna Kossak
field sources
RHS, RHS, RHS, RHS, RHS, RHS, RHS, RHS, RHS, RHS, RHS, RHS, RHS, RHS, RHS, RHS, RHS, RHS, RHS, RHS, RHS, RHS, RHS, RHS, RHS, RHS, RHS, RHS, RHS, RHS, RHS, RHS, RHS, RHS, RHS, RHS
🔍 View Full Plant Profile (37 fields)
{
    "scientific_name": "Allium 'Millennium'",
    "common_names": [
        "allium 'Millennium'"
    ],
    "family": "Amaryllidaceae",
    "height_cm": "10-50",
    "spread_cm": "10-50",
    "height_cm_extracted": "40",
    "spread_cm_extracted": "5",
    "hardiness_zone": "H6",
    "sun_exposure": "Full sun",
    "soil_type": "Chalk, Clay, Sand",
    "moisture": "Well-drained",
    "soil_ph": "Acid, Alkaline, Neutral",
    "foliage_type": "Deciduous",
    "aspect": "South-facing, West-facing",
    "seasonal_interest": "Spring, Summer, Autumn",
    "habit": "Clump-forming",
    "plant_type": "Bulb",
    "time_to_maturity": "2-5 years",
    "suggested_uses": [
        "Beds and borders",
        "Cottage\/Informal",
        "Flower arranging",
        "Ground cover",
        "Underplanting"
    ],
    "garden_uses": [
        "Ground cover",
        "City and courtyard gardens"
    ],
    "fragrant": "Yes",
    "pollinator_friendly": "Yes",
    "low_maintenance": "No",
    "drought_tolerant": "No",
    "seasonal_colours": {
        "Spring": {
            "months": [
                "Mar",
                "Apr",
                "May"
            ],
            "Foliage": [
                "Green"
            ]
        },
        "Summer": {
            "months": [
                "Jun",
                "Jul",
                "Aug"
            ],
            "Foliage": [
                "Green"
            ],
            "Flower": [
                "Pink"
            ]
        },
        "Autumn": {
            "months": [
                "Sep",
                "Oct",
                "Nov"
            ],
            "Foliage": [
                "Green"
            ]
        },
        "Winter": {
            "months": [
                "Dec",
                "Jan",
                "Feb"
            ]
        }
    },
    "flowering_months": [
        "Jun",
        "Jul",
        "Aug"
    ],
    "flower_colour": [
        "Pink"
    ],
    "cultivation": "Grow in reasonably fertile, well-drained soil with full sun. The leaves generally die down before the flowers open. See allium cultivation advice",
    "pruning": "No pruning required, other than to remove old flowered stems and foliage",
    "propagation": "Propagate by division or propagate by offsets which can be carefully detached by lifting the bulb after flowering has finished. See bulb propagation",
    "pests": "May be susceptible to allium leaf miner and onion fly",
    "diseases": "May be susceptible to onion white rot, and onion downy mildew",
    "description": "Clump-forming bulbous perennial to 40cm tall, with thick, narrow mid-green leaves, and pompoms of rose-pink, star-shaped flowers to 5cm across on upright stems, in mid-to late summer",
    "rhs_url": "https:\/\/www.rhs.org.uk\/plants\/315303\/allium-millennium\/details",
    "rhs_image_url": "https:\/\/apps.rhs.org.uk\/plantselectorimages\/detail\/Web_Use-_KOT0910_13177.jpg",
    "rhs_image_copyright": "RHS \/ Joanna Kossak",
    "_field_sources": {
        "scientific_name": "RHS",
        "common_names": "RHS",
        "family": "RHS",
        "height_cm": "RHS",
        "spread_cm": "RHS",
        "height_cm_extracted": "RHS",
        "spread_cm_extracted": "RHS",
        "hardiness_zone": "RHS",
        "sun_exposure": "RHS",
        "soil_type": "RHS",
        "moisture": "RHS",
        "soil_ph": "RHS",
        "foliage_type": "RHS",
        "aspect": "RHS",
        "seasonal_interest": "RHS",
        "habit": "RHS",
        "plant_type": "RHS",
        "time_to_maturity": "RHS",
        "suggested_uses": "RHS",
        "garden_uses": "RHS",
        "fragrant": "RHS",
        "pollinator_friendly": "RHS",
        "low_maintenance": "RHS",
        "drought_tolerant": "RHS",
        "seasonal_colours": "RHS",
        "flowering_months": "RHS",
        "flower_colour": "RHS",
        "cultivation": "RHS",
        "pruning": "RHS",
        "propagation": "RHS",
        "pests": "RHS",
        "diseases": "RHS",
        "description": "RHS",
        "rhs_url": "RHS",
        "rhs_image_url": "RHS",
        "rhs_image_copyright": "RHS"
    }
}

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