
Light Needs

Mature Height

Mature Spread

Growing Zones
Ornamental onions like Millenium Allium are power performers in the garden. This variety has the pretty purple globe-like flower of alliums above clumps of slender green leaves. The result is a rush of fragrant, round flower clusters just above a pretty green clump. Both the leaves and flowers of Millenium Allium have a sweet fragrance. And this little onion hybrid has long-lasting blooms in a drought-tolerant plant.
Millenium Allium blooms appear in summer, a little later than some Allium varieties. They grow in nearly any type of soil and attract bees and butterflies to the rounded flower clusters. Deer and rabbits tend to avoid allium plants. At a height of nearly 20 inches and 15 inches wide, this little allium is a great thriller in garden containers or a nice garden bed border. The flowers are perfect for a round, interesting bloom in flower arrangements.
Millenium Allium Care
Plant Millenium Allium in a garden spot or container that gets at least some sun – 4 hours a day or more. You can place it in a container with potting mix or in poor or clay soil. This allium hybrid will adapt to any soil conditions and typically is free of plant disease. It grows as a perennial in zones 4 through 8. Just cut some of the flowers for fresh or dried arrangements; the allium does not need dividing.
Millenium Allium Spacing
For a mass planting of purple globe-shaped flowers, plant several Millenium Allium plants together. Or make a border of the fragrant summer bloomers. Space the plants about 10 to 14 inches apart from center to center.
Millenium Allium Plant Facts
USDA Hardiness Zones: 4-8 |
Flower Color(s): Purple |
Bloom Period: Summer |
Foliage Color(s): Green |
Light Exposure: Partial Sun to Full Sun |
Height Class: Medium |
Height: 15-20 Inches |
Spread: 10-15 Inches |
Spacing: 10-15 Inches |
Habit: Upright |
Watering: Average |
Drought Tolerant: Yes |
Resists: Deer & Rabbits |
Attracts: Butterflies & Bees |
Features: Drought; Long Blooming; Fragrant Flower |
Scientific Name: Millenium' Allium hybrid |
Common Name: Millenium Allium |
Other Name(s): Ornamental Onion |
Brand: Proven Selections |
- SKU:
- ALLMI
Please Note: The pictures below are to give a general representation of the different container sizes. The actual size/ages of plants are estimates and will vary based on type of plant, time of year, last pruning & many other factors.

Also Known As:
Quart
Plant Age:
~ 6 months - 1 year
Plant Size:
~ 4"-8"
Pot Size:
~ 4.75"H x 4.5"W
Volume:
1.50 quarts

Also Known As:
2.5 Quart Pot
Plant Age:
~ 1 - 2 years old
Plant Size:
~ 8"-12"
Pot Size:
~ 6.5"H x 6.5"W
Volume:
2.20-2.30 quarts

Also Known As:
#1 Container
1 Gallon
Plant Age:
~ 1 - 2 years old
Plant Size:
~ 10"-14"
Pot Size:
~ 7"H x 7.75"W
Volume:
2.26-3.73 quarts

Also Known As:
#2 Container
2 Gallon
Plant Age:
~ 1.5 - 3 years old
Plant Size:
~ 12"-18"
Pot Size:
~ 9.5"H x 9.5"W
Volume:
1.19-1.76 gallons

Also Known As:
#3 Container
3 Gallon
Plant Age:
~ 2 - 4 years old
Plant Size:
~ 12"-30"
Pot Size:
~9.5"H x 11"W
Volume:
2.32-2.76 gallons

Also Known As:
#5 Container
5 Gallon
Plant Age:
~3-4 years old
Plant Size:
~ 20" - 60"
Pot Size:
~11" H x 10 1/2” W
Volume:
3.5 - 4 gallons

We stand behind our plants with industry-leading guarantees to give you peace of mind.
We want your plants to arrive in great condition! If you notice any issues upon delivery, contact us within 3 days.
Starting January 1, 2025 all bushes, perennials & trees purchased come with an extended 1-year warranty for added confidence. If your plant dies due to a health issue within a year, we’ll make it right.

Pre-ordered plants are scheduled to ship in Spring 2025. We carefully plan our shipping dates based on your USDA Plant Hardiness Zone to ensure optimal planting conditions upon arrival. Want it sooner/later? Reach out, and we'll try our best to accommodate.
Estimated ship week for pre-ordered plants will ship based on growing zones as shown below.
Growing Zone | Estimated Ship Week |
---|---|
Zone 10 | March 31th |
Zone 9 | March 31st |
Zone 8 | April 7th |
Zone 7 | April 14th |
Zone 6b | April 21st |
Zone 6a | April 28th |
Zone 5b | May 5th |
Zone 5a | May 12th |
Zone 4 | May 19th |
Zone 3 | May 26th |
Note: These are only estimated ship dates. Plants may ship out later depending on weather & growing conditions of the plant.
Note: Only plants indicated as pre-order will ship as shown above. All other plants and hard goods will ship as normal.
Plants that are currently in stock typically ship within 2-7 business days after your order is placed.
Plant Addicts ships to the lower 48 states within the U.S. Unfortunately, we do not currently ship to Alaska, Hawaii, or internationally.
This plant cannot be shipped to the following states: GA, ID, NV or WA, AK, HI. These restrictions apply only to this specific plant due to agricultural regulations or other limitations. Other plants may still be available for shipping to these states.
If you have any questions about shipping restrictions, feel free to reach out to our team!