Perennial

Eryngium ‘Big Blue’

Eryngo 'Big Blue'
Award Winner Good for cut flowers badge Hardiness H5

Eryngium × olivierianum ‘Big Blue’, often called sea holly ‘Big Blue’, makes a bold statement in gravel or coastal gardens. Its upright stems reach 75cm, topped with thimble-shaped blue flowerheads edged by spiky, silvery-blue bracts in midsummer. A clump-forming perennial, it thrives in well-drained soil and sun, gaining the RHS Award of Garden Merit, valued by pollinators and excellent as a long-lasting cut flower.
SKU: ERY-9CM-TJ4N9R
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Flowering Months
Jan J
Feb F
Mar M
Apr A
May M
Jun J
Jul J
Aug A
Sep S
Oct O
Nov N
Dec D
Size
Max Height
0.5 m — 1.0 m
Max Spread
0.1 m — 0.5 m
Growth Habit
Grows in tight bunches from base, forming rounded groups.
Planting Position
Sunlight i Indicates how much direct sunlight the plant needs each day. Full sun means 6+ hours, part shade is filtered or morning sun, and full shade is little to no direct sun.
Full Sun
Aspect i Aspect refers to the direction the planting spot faces (north, south, east or west). It affects light levels, warmth and exposure.
South East West
Exposure i Exposure describes how sheltered or exposed a plant’s position is, particularly to wind and weather.
Exposed / Sheltered
Hardiness i Hardiness indicates how well a plant tolerates cold conditions outdoors. Higher ratings generally mean greater frost tolerance.
(−15 to −10 °C) Cold-hardy
Ideal Soil Conditions
Soil Type i Soil type describes the texture of the soil (clay, sand, loam, chalk). This affects drainage, nutrients and how roots grow.
Chalk Loam Sand
Soil Moisture i Soil moisture tells you how wet or dry the soil should be for best growth. Match this to your garden conditions for healthier plants.
Free draining
Soil pH i Soil pH measures how acidic or alkaline the soil is. It affects nutrient availability and can impact plant growth.
Acid Alkaline Neutral
Plant Uses & Merits
Uses
  • Architectural
  • Patios / Courtyards
  • Coastal Areas
  • Containers
  • Banks / Slopes
  • Flower Borders
Merits
  • Drought Resistant
  • RHS | Award Of Garden Merit
  • Good for Cut Flowers

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