Allium nigrum

The best of all alliums for naturalising in grass, robust, long-season flowering, impressive yet also with simple, wild flower looks. More
5 bulbs 260878-5 £4.95

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15 bulbs 260878-15 £7.95

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30 bulbs 260878-30 £15.50

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Or buy this as part of our Allium for Grass Collection and White Allium Collection.

More Details

The best of all alliums for naturalising in grass, robust, long-season flowering, impressive yet also with simple, wild flower looks.

This is ideal for giving height and scale to late spring/early summer white-themed planting schemes too.

Genus Allium
Group/Species nigrum (species)
Type Hardy Perennial Bulb
Common Name Black Garlic
Border Position Container
Bulb Size 12/14

For more info on bulb sizes, click here.

Soil Type Chalky, Clay, Fertile, Neutral, Sandy
Scent Scented
Site Full Sun
Moisture Moist but Well-drained, Well-drained
Height 60cm (24in)
Spacing Plant 15cm (6in) deep, 15cm (6in) apart.
Sowing, Seeds, Planting Plant outdoors September-November.
Care Tips Remember these are very perennial so plant them somewhere permanent. Removing the tatty foliage doesn't appear to affect the bulbs. Add grit on heavy soils.
Flowering June
Vase Life Add a drop of bleach to the water to minimise the oniony smell or change the water regularly.
Harvesting Flowers in June
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
  • Sow Under Cover/Plant Indoors
  • Direct Sow/Plant Outdoors
  • Flowers/Harvest
Advice & Videos
How to plant at different soil levels

Growing plants one on top of another gets the most out of every square inch of your outside space.

What to do with your allium seedheads

Sarah shows you her favourite allium varieties for drying, and talks about how to dry them and then spray them for Christmas decorations.

Christmas decorations from the garden

Look to nature to create stylish decorations for the festive period, from items foraged from the hedgerows or collected from your garden.

Preserving flowers and berries in autumn

Preserve your autumn flowers and berries and you'll have beautiful arrangements for Christmas.

Planting numbers for bulbs in borders

A handy guide for how many alliums, narcissi, tulips, snowdrops and other bulbs to plant in your plot.

How to plant and grow allium bulbs

Sarah's top tips on how to plant and grow allium bulbs for fantastic flowers in the garden or vase.

Planting artichokes with alliums

Sarah talks about why and how you should grow artichokes and alliums together.

Delivery

Bulb Delivery - Due to increased levels of demand, please allow up to 3 weeks for despatch.

Click here to find out more information about our delivery rates and times.

Allium nigrum reviews

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Reviewed 31st August 2019 by Rebecca

Perfect for providing height in the borders and interest for bees

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Reviewed 5th July 2019 by Hello Pamela

Lovely strong long lasting flower heads but was expecting white flowers not purple! Not sure I was sent to right bulb.

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Reviewed 5th July 2019 by Hello Julia

I ordered 15 Allium Nigrum bulbs, (which are specifically white,) in Spring they came up as eight purple alliums. I did get a refund, however, so the after sales is good.

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Reviewed 26th June 2019 by Jennifer

I haven’t had much success with this before, still flowering

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Reviewed 26th June 2019 by Jennifer

The wrong allium was sent. Bulbs ordered for a white border but purple received. Very disappointing, a year lost and will have to start again