Eryngium planum Seeds (Blue Sea Holly)
Eryngium planum, commonly known as “Blue Eryngo” or “Flat Sea Holly,” is a hardy perennial cherished for its striking appearance. It showcases intricate, globe-shaped, steel-blue flower heads surrounded by spiky, silvery-blue bracts. Ideal for USDA hardiness zones 4-9, this drought-tolerant plant thrives in well-drained soil and full sun. Mature plants typically reach heights of 2-3 feet, making them suitable for borders and xeriscape gardens. Eryngium planum seeds are readily available for propagation, making it a popular choice among gardeners for its captivating, long-lasting blooms, which attract pollinators and add a touch of elegance to garden landscapes.
Growing Eryngium planum 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: Blue
Germinating Blue Sea Holly Flower Seeds
To germinate Eryngium planum seeds, cold stratify them in the refrigerator for 2-4 weeks. Then, sow the seeds on well-draining soil, lightly pressing them into the surface. Maintain soil moisture and provide full sun. Germination typically occurs in 3-4 weeks.
We source all of our Eryngium planum 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 Blue 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 Blue Sea Holly seeds, we’re happy to send you additional gardening tips. In the (unlikely) event that your Eryngium planum 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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