Camassia 'Zwanenburg'

Delivery begins from 14 September 2026
Spring flowering bulbs and plants are scheduled to begin delivery from 14 September 2026.

3 bulbs
£7.29
£2.43 each
6 bulbs
£13.29
£2.22 each
Save 9%
12 bulbs
£22.19
£1.85 each
Save 24%

Delivery begins from 14 September 2026

Carbon-Neutral Delivery

Our "Bloom or Bust" Promise

Zwanenburg, often admired for its blue-purple colouring, is a bulb variety especially well suited to naturalising.

Camassia 'Zwanenburg' brings a composed, meadow-style elegance to late spring and early summer. Upright, wand-like stems carry tiers of deep blue, star-shaped flowers—particularly handsome drifting through grass, beneath light-canopied trees, or weaving through the middle of a border where a natural, unforced look is prized.

Reliably perennial and wonderfully easy, this Camassia settles in quietly and improves year on year, offering height without heaviness and colour that reads as both cool and richly saturated.

  • Flowering: May–June
  • Height: 50–100cm
  • Best for: Naturalising in grass, meadows, cottage & informal gardens
  • Position: Borders, meadows & naturalising in grass; sun or partial shade
Botanical name Camassia cusickii 'Zwanenburg'
Flower colour Blue-Purple
Bulb size 12/14cm
Established height 50–100cm
Established spread 10cm
Plant spacing 10–15cm
Leaf colour Green
Habit Columnar upright, clump-forming
Life cycle Perennial
Hardiness Fully Hardy
Years to establish 2–3 years
Sunlight Partial Sun
Position Borders, meadows & naturalising in grass; sun or partial shade
Suitable for Naturalising, Cottage & informal gardens
Soil acidity Any
Soil moisture Moist but well-drained
Soil type Loam
RHS Award (AGM) No
Growing skill Easy
Pollinator-friendly Yes
Deer resistant No

Where to Plant:

Camassia 'Zwanenburg' needs partial sun and a warm, sheltered position for the best flowering. Plant into fertile, humus-rich soil that drains well, and choose a spot protected from strong winds, especially for taller varieties.

How to Plant:

Plant bulb from September to December once conditions are suitable. Set them at the correct depth for the variety, spacing 10–15cm apart where relevant, then firm in gently and water well after planting.

Aftercare:

Water regularly in dry weather and feed every two to three weeks once buds appear. Stake taller stems early and deadhead to keep plants flowering. After flowering, allow foliage to die back naturally before lifting or protecting bulb according to local conditions.

Planting and Flowering Calendar

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Key Features

Packed in paper

Packed peat-free

Great for Shade

Attracts wildlife

Naturalising

Camassia 'Zwanenburg' - Harding & Bloom

Camassia 'Zwanenburg'

£7.29

£7.29

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Kind Words from Our Gardeners

Arrived quickly and well-packaged. Planted them in some pots on the patio and they all came up. Look beautiful. Thank you!

Careane Wallace

Oxfordshire, UK

The bulbs arrived beautifully packaged and you could just tell they were excellent quality. We had the most wonderful display of daffodils this spring on our patio. Simply stunning. Will definitely be ordering again

David P

Kent, UK

I ordered the mixed hyacinth collection and the scent in my garden this April was absolutely heavenly. Every single bulb produced a strong, beautiful flower and the colours were stunning together. A fantastic purchase, I'll be back for more next year!

Eleanor R

Somerset