Details of...
Scientific Name: Eryngium planum
Pronunciation: ur-IN-jee-um PLAY-num
Common Name: blue sea holly, flat sea holly
Family Name: Apiaceae
Plant Type: Broadleaf evergreen
Key ID Features: Basal, clumping, taproot; leaves dark green, oblong-ovate, leathery, dentate; flowers blue/blue-green bracts, Aug-Oct, tight clustered spikes, umbels (three or more may arise from common node).
Course(s): HORT 2355

Habit: Upright
Form: Oval - vertical
Texture: Coarse
Mature Size:
Height:0.7 - 1.3m
Spread:0.3 - 0.6m
Growth Rate:Moderate
Origin: Europe
Hardiness Rating: Zone 4: (-34 to -29 C)
Exposure: Full sun
Soil/ Growing Medium: Well-drained
Landscape Uses: Attract beneficial insects, Attract butterflies, Cut flower or foliage, Dried flower or fruit, Fall interest, Perennial border, Small garden/space, Summer interest
Additional Info: Google. Similar to E. bourgatii
blue sea holly, flat sea holly
Leaf Morphology: Glossary
Form: Simple
Arrangement: Basal
Texture/ Venation: Leathery
Surfaces: Glabrous
Colour in Fall: Green-yellow
Leaf(let) Terms:
Shapes: Oblong, Ovate
Margins: Dentate, Palmately lobed, Spinose

Inflorescence Type: Floriferous, Head-like, Umbel
Flower Morphology:Flowers perfect
Number of Petals:5
Corolla Shape:Funnelform
Ovary Position:Inferior
Colour (petals): Showy, Blue
Flower Scent: None
Flower Time at Peak: Aug, Sep, Oct

Fruit Type: Schizocarp, Achene
Fruit Colour: Brown
Fruiting Time:
Additional Info: Not showy

Bark or Stem Colour:
Organ Modifications: Storage tap root, may be invasive

Pest Susceptibility: Rabbit resistant, Drought resistant
(BUG) BUG garden
(PDE) PonD East
(PDW) PonD West
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