Eryngium maritimum
Sea holm, Sea eryngium
- Height × spread
- 0.4m × 0.5m
- Position
- Full sun
- Hardiness
- Colder than -20C (RHS H7)
- Flowers
- Summer
Availability
Please ask in store about availability
Many plants are seasonal. Call 01234 567890 to check current stock.
About this plant
This plant is found on beaches but is not for the barefooted. It makes a wonderful sprawling specimen with blue-grey leaves, jagged and prickled. The shiny, silvered flower heads make rounded cones surrounded by flat spiny collars, ironed out flat and hard looking. The mature flowers start blue and gradually fade to beige whilst the foliage stays silver and bleached looking.
- Flower colour
- Blue, Grey
- Foliage colour
- Blue, Grey
- Fruit colour
- Beige
- Variegated
- No
- Scent
- No
- Shape
- Column
- Height
- 0.4m
- Spread
- 0.5m
- Season of interest
- Summer
- Flowers in
- Summer
- Evergreen
- Deciduous
- Garden style
- Seaside garden, Prairie garden, Gravel garden, Cottage garden
- Sun or shade
- Likes full sun
- Soil type
- Chalk, Gravelly soil, Loam (normal), Poor soil, Sandy soil
- Soil pH
- All types
- Drainage
- Well drained soil, Dry soil, Drought resistant
- Hardiness
- Colder than -20C (RHS H7)
- Borders & containers
- Borders
- Use for
- Deer resistant, Rabbit resistant, Bee attraction, Butterfly attraction
- Hazards
- Yes, leaves are prickly
Spring
Spring-Autumn · Outdoors
Water in dry periods
Established plants in the ground can cope with 7-10 days of dryness, and shrubs often manage 2 to 3 weeks. Water one section of the garden thoroughly each day rather than a little everywhere. Check plants in pots more often, especially in hot weather.
Spring - early-mid · Planting
Divide when too large
The plant can be divided if it becomes too large or another plant is required. This may involve physically dividing the clump in two, removing offsets or small bulbs or dividing rhizomes. The new plants can be grown in pots or planted in the ground.
Summer
Summer - early · Outdoors
Feed a general fertiliser
Where plants have moderate needs for nutrients, they can simply be given a general feed, fairly early in the growth season so that the growth has plenty of time to harden off before the cold weather.
Give plants a general boost with the application of a general purpose fertiliser which is spread around the root area of the plant, with amounts as directed on the feed label.
Found in
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