Allium Sphaerocephalon Bulbs - Carbeth Plants - 50

Allium Sphaerocephalon, commonly known as the Drumstick Allium, is a popular two-toned variety tha...

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B&QB&Q - 50 X Allium Sphaerocephalon Drumstick BulbsTwo Toned Summer Flowering PerennialsAttracts PollinatorsUk Hardy
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Carbeth PlantsCarbeth Plants Green/Burgundy/Purple Allium Sphaerocephalon Bulbs
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The Allium Sphaerocephalon, or Drumstick Allium, is the perfect choice for gardeners looking to add architectural height and pollinator-friendly interest to their borders from mid to late summer. These resilient bulbs offer a unique two-toned aesthetic, transitioning from green to a deep burgundy-purple, and are highly effective when planted in large groups. While they are incredibly low-maintenance and winter-hardy, they do require well-draining soil to prevent bulb rot during the wetter months.

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Model Part NumberALIUMSPHERO-50
BrandCarbeth Plants

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FAQs

When is the best time to plant these bulbs?

These bulbs should be planted during the autumn or winter months before the ground becomes deeply frozen.

Do I need to lift the bulbs in winter?

No, Allium Sphaerocephalon is fully UK hardy and can remain in the ground year-round.

What soil type is best?

They thrive in fertile, well-draining soil. If your garden has heavy clay, add grit to the planting hole.

Can these be grown in pots?

Yes, they grow very well in pots, provided the container has good drainage holes and the compost is not overly dense.

How deep should I plant the bulbs?

Plant them at a depth three to four times the vertical height of the individual bulb.

Will they come back every year?

Yes, as a hardy perennial, they will return annually if the soil conditions remain well-drained.

Troubleshooting

Bulbs failing to emerge in spring

Often caused by waterlogged soil in winter. Ensure the planting site has excellent drainage and avoid heavy, compacted ground.

Stems are weak or leaning

This usually indicates the bulbs are not receiving enough direct sunlight. Ensure they are planted in a sunny or only lightly shaded spot.

Pros and Cons

Pros

  • Attracts essential pollinators to the garden
  • Winter-hardy and returns reliably each season
  • Stunning color-changing visual effect
  • Versatile for both in-ground and container gardening

Cons

  • Requires well-draining soil to avoid bulb rot
  • Does not bloom until mid-to-late summer
  • Requires proper autumn or winter planting timing

Setup, Compatibility & Care

To ensure success, plant your bulbs during the autumn or winter months. Choose a location that receives full sun to partial shade. Prepare the soil by ensuring it is fertile and free-draining; if you have heavy clay soil, mix in some horticultural grit to improve drainage.

  1. Spacing: Place bulbs approximately 10 cm apart.
  2. Depth: Bury the bulbs at a depth roughly three to four times the height of the bulb itself.
  3. Storage: If you are not planting immediately, keep the bulbs in a cool, dry, frost-free, and well-ventilated location to prevent premature sprouting or mold.
  4. Maintenance: Very little care is required once established. You may trim the foliage once it has died back completely in late autumn.

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