Tulipa 'Blue Diamond' (tulip 'Blue Diamond)

Guaranteed delivery week: week commencing Monday 14 September 2026
Autumn planting bulbs and spring flowering plants will be delivered during this week.

10 bulbs
£10.49
£1.05 each
30 bulbs
£29.39
£0.98 each
Save 7%
60 bulbs
£55.29
£0.92 each
Save 12%

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Blue Diamond, often admired for its purple colouring, is a bulb variety especially well suited to borders.

Tulipa 'Blue Diamond' is a decidedly refined Double Late tulip, opening in a deep, velvety purple and softening to handsome grey-silver nuances as the blooms mature. The flowers are generously petalled with a quietly luxurious presence—particularly effective in smart pots, or threaded through spring borders where richer tones are welcome.

For best results, plant in a sunny, sheltered position in fertile, well-drained soil, and avoid winter waterlogging. At around 40cm tall, it brings polished structure to late spring planting schemes without ever feeling showy.

  • Colour progression: rich purple, ageing to grey-silver tones
  • Form: Double Late (double flowers) with an elegant, full finish
  • Best for: pots & containers, and spring borders
Botanical name Tulipa 'Blue Diamond'
Flower colour Purple
Bulb size 11/12
Established height 40cm
Established spread 10cm
Plant spacing 10-15cm
Leaf colour Pale green
Habit Upright
Life cycle Perennial
Hardiness Fully Hardy
Years to establish 1
Sunlight Full-Sun
Position Sheltered
Suitable for Borders, Pots & Containers
Soil acidity Any
Soil moisture Well-drained
Soil type Loam
RHS Award (AGM) No
Growing skill Easy
Pollinator-friendly No
Deer resistant No

Where to Plant:

Tulipa 'Blue Diamond' (tulip 'Blue Diamond) needs full-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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Planting
Flowering

Key Features

Packed in paper

Packed peat-free

Great for Shade

Attracts wildlife

Good for cutting

Tulipa 'Blue Diamond' (tulip 'Blue Diamond) - Harding & Bloom

Tulipa 'Blue Diamond' (tulip 'Blue Diamond)

£10.49

£10.49

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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