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(513) 354-1497
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513-354-1497
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513-354-1498
Mailing Address
Michigan Bulb Co.
P.O. Box 4180
Lawrenceburg, IN
47025-4180
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Blue Sea Holly
A real survivor that even tolerates harsh conditions!
The perfect solution for hard-to-fill spots, Blue Sea Holly offers attractive blue-gray foliage and interesting blue flowers that make excellent additions to fresh or dried bouquets. Best of all, this hardy perennial thrives in dry, sandy, sunny areas and it even tolerates salty conditions!
Light: Full sun
Blooms: Summer
Height: 24-30"
Size: Potted
Zone 4 to 10
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| Botanical Name: |
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Eryngium alpinum |
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| Form: |
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Herbaceous perennial |
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| Sun Exposure: |
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Full Sun |
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| Height/Habit: |
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24" - 30", upright |
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| Spread: |
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18" - 24" |
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| Spacing: |
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18" - 22" |
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| Hardiness Zone: |
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4 - 8 (-30 degrees F) |
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| Foliage Type: |
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Lower leaves heart-shaped, up to 6" long with margins covered in spiny teeth. Stem leaves palmately lobed, tinged with blue. |
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| Flower Form: |
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The 1 1/2" pineapple-like heads are subtended by several ruffs of delicate, pinnetely cut, steel blue bracts. |
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| Flower Color: |
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Intense steel blue |
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| Flowering Date: |
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Mid to late summer |
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| Planting Requirements: |
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Dig a hole large enough to accommodate the roots without bending them. Plant firmly and water in thoroughly |
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| Soil Requirements: |
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Well drained, open soil |
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| Growth Rate: |
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Moderate once established, which takes approximately 4 - 6 weeks |
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| Unique Characteristics: |
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All parts of this plant are highly ornamental. The flowers are striking with their long pointed bracts that radiate out beneath the flower heads. The icy blue and gray coloring only adds to this dramatic effect. This is complimented by holly-like foliage that also has a blue hue and gray markings. The stems are also blue. All in all a beautiful, unique and dramatic addition to the garden. Given full sun and a well drained soil Eryngiums will flourish for years. They also make dazzling cut flowers.. Many consider this species the most beautiful of the Sea Hollies, it's certainly the bluest. |
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| Pruning: |
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None, except to cut back spent flower stems |
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| Time of Pruning: |
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After flowering |
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| Additional Information: |
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This has an extended bloom time as the side branches produce abundant, albeit smaller flowers. These, along with the terminal flower forms an open, broad conical flowering head. |
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