Calibrachoas
Calibrachoas, which are also called "million bells," are hanging plants that have beautiful bell-shaped flowers that bloom all summer long. They could be red, blue, purple, yellow, pink, or white.
Pentas
Pentas lanceolata, another hot-weather flower, is hardy to USDA zones 10 and 11. Their star-shaped red, pink, purple, or white blooms attract butterflies and hummingbirds throughout June.
New Guinea impatiens
New Guinea impatiens (Impatiens hawkeri) are excellent summer garden plants because they can handle the early light. These flowers may thrive under harsh conditions.
Vincas
Annual vincas (Catharanthus roseus) are heat- and drought-tolerant. They have summer-blooming pink, red, purple, or white pinwheel blooms. Vincas are grown as annuals in much of the US and demand full sun and well-draining soil.
Geraniums
Geraniums (Pelargonium spp.) are fragrant flowers that can give your garden gorgeous color and a sweet scent. Geraniums are commonly available in shades of white, pink, red, and coral.
Cosmos
Cosmos bipinnatus, a lovely, feathery shrub, blooms freely from summer till frost. This cottage garden classic comes in white, pink, and orange. Single-, double-, and bi-colored flowers are available.
Zinnias
Zinnias (Zinnia spp.) are attractive summer garden flowers. They are available practically anyplace that sells planting flowers. The plants have coarse leaves and multicolored flowers.
Begonias
Begonias (begonia spp.) may grow over 2 feet tall and have colorful, fluffy blooms and huge green foliage. Since they simply require partial light, frequent watering, and well-drained organic soil, they are popular nationwide.