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'Blue Cap' Sea Holly is easy to grow. Iridescent bright blue, spiny, thistle-like flowers July to September. Superb cut flowers, fresh or dried. Grows to 3 feet tall. Winter hardy to zone 5. Combines nicely with Gay Butterflies Butterfly Weed, Primadonna White Echinacea, and Giant Yellow Herold Foxglove.
'Blue Glitter' Sea Holly produces elegant, dense spikes of blue, pincushion-shaped flowers on long silver-blue stems. Plants grow 35-40 inches tall. 'Blue Glitter' is a versatile perennial for flower arrangements and the landscape. A Fleuroselect Gold Medal award winner (Europe's highest honor). Winter hardy to zone 4.
'White Glitter' Sea Holly produces dense spikes of elegant white, pincushion-shaped flowers. Superb cut flowers, fresh or dried. Grows 35 to 40 inches tall. An outstanding performer in the garden, produces plenty of color, needs little care. Winter hardy to zone 4.
The brilliant blue flowers of 'Blue Hobbit' Sea Holly appear on heavy blooming dwarf, compact plants which grow only 12 inches tall. 'Blue Hobbit is a wonderful accent plant perfect for using in containers or at the front of borders. Flowers July to September. Winter hardy to zone 4.
Sow Sea Holly seeds in 2 inch pots or cell packs, press into soil and barely cover. Needs light to germinate. Kept at 70° F., germination usually within 4 weeks. If not, put container inside a zip-lock bag and place in the refrigerator for 4 weeks. Return to 70° F. until germination occurs. Transplant 'Blue Hobbit' Sea Holly 8-12 inches apart, other Sea Hollies 18-24 inches apart. See starting your seeds for more information.
Growing Sea Holly: Full sun. Sea Holly plants tolerate heat, drought, humidity and salt and prefer deep, sandy soils. Will tolerate any soil as long as drainage is good. Water weekly during hottest weather for best performance. Cut flowers are long lasting, fresh or dried. The intense blue color of the flowers are intensified by warm days, followed by cool nights. Flowers attract bees, hummingbirds and butterflies.