The first globe-shaped flower I planted is chives (Allium schoenoprasum). The pink-purple bloom of chives appears on edible stems that reach 12 to 18 inches tall. As a perennial plant, split chives about every three years to increase the coverage in your flower garden. Chives are cold hardy in USDA zones 3 to 9.
Bachelor buttons (Centaurea cyanus), also called cornflower, is my second favorite globe-shaped flower (my favorite is chives because they are edible). An annual plant, bachelor buttons grows to 2 to 3 feet tall and works great in floral arrangements. I like to stand the snipped stems in an empty vase to allow the blooms to dry. After the blooms have dried for a few weeks, I spray them with glue and sprinkle glitter over the blooms for extra bling.
Sea thrift (Armeria maritima), also called sea pink, is a perennial with white, pink, red or violet blooms on stems that reach 6 to 12 inches tall. If you live near the sea, you will appreciate this flower for its salt-tolerate nature. Sea thrift is cold hardy in USDA planting zones 4 to 8.
Choose globe thistle (Echinops) for a location where it can grow with abandon because this perennial plant self-seeds easily. Deadheading helps reduce reproduction. You may find it easier to use large clippers to snip the tops since the plant is a little prickly. Growing to a height of 18 to 24 inches in USDA planting zones 3 to 9, the blue blooms of globe thistle are favored for floral arrangements.
Globe amarantha (Gomphrena globosa), an annual flower, produces pink or tan blooms from summer into fall. The plant grows 1 to 2 feet tall and blooms from summer to fall. I like globe amarantha because it is easy to collect dried seed heads in late fall to replant the following spring after the last frost.
Giant flowering onion
Giant flowering onion (Allium giganteum) is an eye-catching plant. Reaching up to 4 feet tall, this perennial bulb produces a purple globe-shaped bloom as much as 4 inches across. The bloom time is short, from late spring to early summer. Giant flowering onion is cold hardy in USDA plantings zones 5 to 9. Though I have not purchased this plant (yet), I did notice in a friend's garden that the foliage looked unattractive. Plant away from walkways or surround giant flowering onion plants with shorter plants to hide the foliage.