All plants require sunlight to live, but not all plants can handle long, hot summer days. Gardeners who live in warm climates may struggle to find flowering plants whose blooms don't wilt in the hot sun. Luckily there are some exceptionally beautiful plants that not only tolerate a full day of sun, but thrive in it.
Black-eyed Susan (Rudbeckia hirta) is a flowering plant that produces bright yellow flowers that resemble smaller, more delicate sunflowers. The state flower of Maryland, Black-eyed Susans are sun-loving plants that will grow in a range of gardening zones. The Black-eyed Susan Early Bird Gold (Rudbeckia fulgida 'Early Bird Gold') will grow in moist, well drained soils in full sun in USDA gardening zones 4 to 10. These cheerful flowers attract butterflies in droves, and have the added benefit of being mildew resistant.
The Bellflower (Campanula) genus contains close to 300 species of flowering plants that share one attribute in common: their blue, bell-shaped flowers. The La Belle Bellflower (Campanula persicifolia) will grow in full sun in gardening zones 3 to 8, although some shade in hot summers is advisable. The La Belle blooms in early to mid summer with large, deep blue blossoms, and may bloom again in the same season if deadheaded. These plants will grow well in moist, well drained soils with neutral to alkaline pH levels. With a maximum height of 18 to 24 inches, La Belle also makes an excellent container plant.
Blanket flowers (Gaillardia) are drought tolerant plants from the sunflower family that are native to North and South America. Most species of blanket flowers require at least six hours of full sun a day, and many can grow in gardening zones 5 and up. Named for their resemblance to Native American blankets, blanket flowers are available in a range of warm orange, yellow and red hues.
The Firewheel (Gaillardia pulchella) is a radiant flower that boasts two-toned petals of orange red and bright yellow. The state wildflower of Oklahoma, firewheels grow in sandy, well drained soils and full sun.