Eryngium giganteum Seeds (Silver Sea Holly)
Eryngium giganteum, commonly known as “Miss Willmott’s Ghost” or “Giant Sea Holly,” is a striking perennial prized for its unique appearance. It displays enormous, cone-shaped, metallic-blue flower heads surrounded by silvery, spiky bracts, resembling a thistle. Thriving in USDA hardiness zones 5-9, this drought-tolerant plant prefers well-drained soil and full sun. Mature specimens can reach heights of 3-4 feet. Eryngium giganteum seeds are often sought after by gardeners for propagation, making it an exquisite addition to gardens and bouquets, with its otherworldly, architectural presence and the ability to attract pollinators like bees and butterflies.
Growing Eryngium giganteum from Seed
- Growth cycle: Perennial
- Watering: Light
- Sunlight: Full Sun
- Suitable climates: Marine West Coast, Mediterranean, Humid Subtropical, Tropical Wet, Tropical Wet & Dry, Arid
- Where to grow: Outdoors
- Flower color: White
Germinating Silver Sea Holly Flower Seeds
To germinate Eryngium giganteum seeds, stratify them by cold treatment in the refrigerator for 2-4 weeks. Then, sow the seeds on well-draining soil, lightly covering them. Maintain moisture and provide full sun. Germination typically occurs in 2-4 weeks.
We source all of our Eryngium giganteum seeds from a small greenhouse facility based in southeastern Maine and store them in a dark, temperature-controlled environment before shipment. You’ll find that our fresh Silver Sea Holly seeds are much easier to germinate than the mass-produced packets of flower seeds found in stores! If you have any trouble growing Silver Sea Holly seeds, we’re happy to send you additional gardening tips. In the (unlikely) event that your Eryngium giganteum seeds do not germinate at all, we’ll give you a full refund, no questions asked.
We offer this variety on Etsy, eBay, and Amazon, as well!
Shipping & returns
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