Blue Glitter, Eryngium Seeds
Botanical NameEryngium planum
Additional CharacteristicsAttracts Pollinators, Attracts Birds, Deer Resistant, Extended Blooms, Erosion Control
Seeds Per Gram776
Seeds Per Pound352,000
Seeds Per Ounce22,000
Days To Maturity (# Days)365
Learning Download: How to Grow Eryngium
Eryngium, also known as sea hollies, produce beautiful flowers that make a garden look unique and fascinating. They have spiny leaves and they bloom in clusters with teasel-like blossoms.
Before Planting: Sow Eryngium seeds indoors 10 to 16 weeks before the last frost. Light is required for the seeds to germinate, so do not cover them with soil. Harden the transplants off and move them outside after the last frost.
Planting: If Eryngium are sown directly into the garden, they may not bloom their first year. Prior to planting, use a warm stratification process for one month followed by cold stratification for one month, as well.
Watering: Eryngium does not require much watering, as it is drought tolerant and only needs to be watered during dry periods.
Fertilizer: Do not fertilize Eryngium as fertilizer can make the flowers spread and appear droopy.
Days to Maturity: Eryngium plants will bloom from July through September.
Harvesting: The plant’s flowers make excellent dried flowers as they keep their unique and vibrant color even after picked, and even after they have dried. The flowers should be cut when the cones are blue or white, depending on the variety.
Tips: once the flowers’ blooming period ends in the fall, cut the flowering stalks back, but leave the evergreen foliage.
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