Spiky, steel-blue thistle-like flowers with feathery collars that add bold structure to borders and bouquets. Loved by pollinators and unbeatable in dried arrangements. A true perennial showstopper that thrives on neglect once established.
When to Sow: Jan – May / Sep – Oct
HOW TO SOW ERYNGIUM:
SEEDS NEED COLD STRATIFICATION - place seeds in the fridge for 4–6 weeks before sowing.Sow on the surface or lightly cover with vermiculite — they need light to germinate. Keep moist and be patient, germination can be slow and erratic. Transplant when seedlings are strong and handle carefully.
Classification: Hardy Perennial
Expert Level: Intermediate (Slow to Germinate)
Germination Time: 3–6 Weeks (sometimes longer)Site: Full Sun
Soil Type: Poor to moderately fertile, well-drained
Soil Acidity: Neutral to Alkaline
Moisture: Dry to Medium
Care: Doesn’t like root disturbance — plant where it can stay
Use: Cut Flowers, Dried, Pollinator-Friendly Borders
Harvesting: Cut stems when bracts are fully coloured but before they fade
Days to Maturity: 120–150 Days
Vase Life: 10–12 Days (excellent dried)
Height: 90–100cm
Plant Spacing: 30cm
Eryngium Alpinum Superbum ( Sea Holly)
Approx 20 seeds per pack. Please note that the majority of our seeds are packed by volume so the number of seeds indicated is an approximation.
We make every effort to provide British seeds where possible, but in some cases our British Growers are unable to grow in sufficient quantities to meet our demand or the seeds are subject to Plant breeders' rights which means it is only possible for us to buy these seeds from certain non UK flower farms