bulb corm tuber RHS Award
Allium senescens
German Garlic, Ornamental Onion
$14.95
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Essentials
At a Glance
Plant Type
Bulb Corm Tuber
Height
12 inches
Width
12 inches
Light
Full Sun, Partial Sun
Zones
4, 5, 6, 7, 8
Water
Moderate
Humidity
Average
Lifespan
Perennial
Native To
Central Asia
Toxicity
Toxic to dogs and cats
The Story
Plant Bio
Allium senescens, commonly called ornamental onion, is a hardy perennial native to Europe and Asia, known for its attractive globular purple flower heads. This species is notable for its twisted, grass-like leaves and robustness; it often remains attractive even when dormant.
Bloom Period:
J
F
M
A
M
J
J
A
S
O
N
D
EarlyLate
Uses & Benefits:
Allium senescens provides striking blue-gray foliage and delicate flower umbels, enhancing borders and rock gardens with texture and color.
Its natural pest resistance reduces maintenance needs.
Attracts pollinators like bees and butterflies, supporting local biodiversity.
Marketplace
Where to Buy
<1 Gal Pot
In Stock$14.95
Shipping costs Year-round shipping Free shipping
Planting
How to Grow
- Tuck bulbs 4-6 inches deep in well-draining soil in fall.
- Water thoroughly after planting to settle soil.
- Mist foliage during dry spells to maintain humidity.
- Thin out crowded clumps after 3-4 years for better growth.
- Divide clumps in early spring or fall to propagate.
- Apply a balanced fertilizer in early spring for optimal blooms.
Pro Tip
Plant in full sun with well-draining soil for best performance.
Keep It Thriving
Care Guide
Do
- Water regularly during active growth 🌱
- Provide full sun exposure for vibrant blooms
- Divide mature clumps every 3-4 years
Don't
- Avoid overwatering to prevent bulb rot ❌
- Don’t plant in heavy clay soil without amendment
- Refrain from cutting foliage too early after blooming
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Divide | ||||||||||||
| Fertilize | ||||||||||||
| Plant | ||||||||||||
| Spring Cleanup |
Watch Out For
Pests & Diseases
Common Pests
Common Diseases
In the Garden
Landscape Uses & Companions
Landscape Uses
Sparse ornamental borderWildflower meadow accentTextural perennial bed
Companion Plants
Sedum Echinacea Lavender Coreopsis Yarrow
Multiply
Propagation Methods
Good to Know