Unpack bare roots or rhizomes on arrival and plant them within a week. Until then, keep them somewhere cool and ensure the roots remain slightly moist, never wet.
Out of season
Eryngium
'Silver Salentino'
white sea holly
Enjoy the frosty-cool colour and form of Eryngium 'Silver Salentino' through summer, autumn and winter. This hardy and resilient perennial has so much to offer in terms of architectural impact, and the spiky, upright structure keeps on giving long after the flowers have faded, leaving behind snowflake-like seedheads which sparkle with frost in the winter sun. With its spikey bracts and thistle-like flowers, Eryngium 'Silver Salentino' brings a touch of originality wherever it’s planted. Energising planting schemes with its cool silvery colouring, it grows into a statuesque plant, rapidly putting on growth in late spring and early summer each year to produce stems up to about 1m high. Each stem of this white sea holly is topped with a constellations of starry white buds. These open up into fascinating ball-shaped flowers with a pearly patina, surrounded by jagged silver bracts.
Very attractive to pollinating insects, Eryngium planum 'Silver Salentino' flowers keep coming through summer, and even after the show is over, this plant provides a beautiful, almost ethereal presence to the winter garden with its enduring seedheads. It’s a drought-tolerant plant, its thick grey-green foliage designed to minimise water loss. Place it in the sun, where its reflective colouring will shimmer, lighting up your borders. Eryngium 'Silver Salentino' is tolerant of some of the toughest sites, including those with salt-laden coastal winds and sandy or stony free-draining soil. Perfect in gravel areas or Mediterranean planting schemes, it needs little care once it’s settled in and looks right at home blended with other drought-tolerant plants such as salvia, echinops, sedum and euphorbia.
Quantity
Plant profile
Plant calendar
Remove the packaging straight away, check the compost and water thoroughly if dry. Check the plant’s hardiness before placing it outdoors. Plant into a border or permanent container within a month, choosing the position recommended for the variety. Keep the top of the root ball level with the surrounding soil, firm gently and water well.
Soak the roots in water for three to six hours immediately before planting. Keep any crown, buds or emerging shoots above the water where possible.
Pot most bare roots into 15–20cm pots filled with peat-free multipurpose compost. Large or depth-sensitive roots, including peonies, are often best planted directly into borders.
Arrange the roots naturally without bending them. Cover the roots completely, positioning the crown and buds at the depth recommended for that particular perennial.
Keep pots in a sheltered outdoor position and water whenever the compost begins to dry. Grow on until roots hold the compost together when lifted from the pot.
Plant into a suitable border or permanent container once well rooted. Add a label and water regularly throughout the first growing season while the perennial establishes.
- Botanical name
- Eryngium planum 'Silver Salentino'
- Flower colour
- White, silver
- Established height
- 50-70cm
- Established spread
- 20-30cm
- Growing skill
- Easy to grow
- Habit
-
Upright
Clump-forming - Hardiness
- Fully hardy
- Leaf colour
- Green, silver
- Mouse resistant
- Yes
- Plant size
- 1
- Plant spacing
- 9 plants per m2
- Pollinator friendly
- Yes
- Position
-
Sheltered
Exposed - Rabbit resistant
- Yes
- RHS Award (AGM)
- Yes
- Scented
- Yes
- Soil acidity
- Any
- Soil moisture
-
Free draining
Dry - Soil type
-
Loam
Sandy
Clay
Multipurpose compost
Loam-based compost - Suitable for
-
Borders
Coastal gardens
Cottage gardens
Cut flower gardens
Pots
Large containers - Sunlight
- Full sun
- Toxicity
- No report
- Years to establish
- 1-2 years
Good for cutting
Pollinator-friendly
Fragrant
Thrives in full sun
RHS Recommended
Perennial
Fully hardy
Packed peat-free
Drought tolerant
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Chosen to thrive
Every bulb and plant is sourced, selected and prepared with an expert eye for their quality and garden performance.
