Flowers That Get Very Tall

USDA Zone 3

• The aromatic, pink flowers of the queen of the prairie bloom during June into August in U.S. Department of Agriculture plant hardiness zone 3. A plant capable of growing to 8 feet, queen of the prairie thrives in moist ground, making it a possibility for pond edges and wet meadows. Another option for zone 3's wet sites is the glossy-leaved aster, which generates violet-rayed flowers that have a yellow disc at their center. This aster attracts varied butterfly species. Everlasting pea takes its name from the prolonged blooming period of its flowers. Growing like a vine, sometimes to 9 feet, the plant flowers from June through September and it twines upward, supported by structures such as fences or walls.

USDA Zone 5

• The flowers on a Japanese banana plant bloom in the summer, but this huge perennial, which can reach up to 14 feet high, has a reputation for interesting foliage. The leaves, shaped like paddles according to the Missouri Botanical Garden, are as wide as 2 feet and as long as 6 feet. Put plenty of mulch around the plant base in USDA zone 5 to protect it from potential cold in the winter. The hardy hibiscus cultivar called Turn of the Century grows to 8 feet and features flowers up to 9 inches wide. Each flower remains open for a single day, but enough of them bloom during the summer so that there is a floral presence on the plant all the time.

USDA Zone 7

• Climbing milkweed is a twining vine that grows in USDA zone 7 in sun or partial shade. It blooms during June and July, turning out greenish-purple flowers. The heart-shaped foliage of climbing milkweed is sometimes 8 inches long, and the plant is suitable for placing near a trellis, shrub or fence, where it will gain hold and grow as tall as 10 feet. Water gardens, bog gardens and the edges of any pond on your property in zone 7 will support hardy water canna. Growing to 10 feet high in the shallows or in very damp ground, the plant has purple flowers during July into August.

USDA Zone 9

• The leaves and seed capsules of a castor bean plant are more ornamental in nature than the yellow-green flowers; the plant is an annual in colder zones but a perennial in USDA zone 9. It grows very quickly, sometimes elevating to 10 feet tall. Alert your family to its poisonous nature and keep little children away from it. Flowering banana, from India, lives as a perennial in zone 9, growing to 9 feet. The newer plants usually do not flower during their first growing season and often not until their third year. The flowers are attractive, with their orange-yellow colors, and combine with the large bluish-green leaves to make this an appropriate specimen species.