Whether gardeners are looking for year-round flowering plants for hedges, borders, flower gardens, container gardens or accents, their choices are vast and varied. Gardeners will find many flowering ground covers, shrubs, trees, tropicals or perennials that spruce up the landscape with their yearlong blooming habit. As with any new plant added to the garden, consider its growth requirements when selecting a planting site.
Mexican heather (Cuphea hyssopifolia), also called false heather, is a perennial, flowering plant well suited for growing in USDA zones 8 through 11. Depending on the cultivar, flowers bloom in colors of purple, white or pink year-round, making it a colorful addition to flower gardens, borders or butterfly gardens, as it attracts butterflies. Its shrublike mounds grow up to 2 feet in height with a spreading habit of 2 to 3 feet. Plants may require light pruning because they can become weedy and uncontrolled-looking as they mature.
Mexican heather is tolerant of cooler weather, but hard freezes will kill it. Plants are tolerant to a wide range of well-drained soils, growing and blooming best in sun to partial sun conditions. Mexican heather has a high tolerance to drought but plants watered regularly perform best. It has a moderate tolerance to salt making it suitable for planting in coastal areas not located directly on the water.
Beach sunflower (Helianthus debiles) is a fast-growing perennial that is adapted to growing in USDA zones 8 through 11. There are purple and yellow cultivars, with both producing year-round flowers filling the plant. Beach sunflower attracts birds and butterflies making it suitable for butterfly and native gardens, as well as in borders or containers. Plants grow anywhere from 1 to 4 feet in height with a spreading habit of 2 to 4 feet.
Plants prefer growing in sandy or loam soil conditions that drain very well, as plants will develop a fungus when grown in wet locations. It grows and flowers best located in full sun and has a high drought tolerance but will grow and flower best with regular weekly watering. Its high tolerance to salt spray makes it suitable for use as a ground cover in landscapes located directly on the ocean.
Thyrallis (Galphimia glauca), also called rain-of-gold, is an evergreen, perennial small shrub that grows best in USDA zones 9 and 10. This heat-lover has a medium growth rate and grows to 5 to 9 feet in height with a spreading habit of 4 to 6 feet. It is suitable for use in hedges, as screening plants or where year-round color is required. Clusters of small, bright yellow flowers bloom year-round on deep green foliage.
Plants have a medium drought tolerance once established but regular weekly watering will promote the best growth and flowering. Situate thyrallis plants in full sun, though plants will tolerate partial sun conditions. It is tolerant to a wide variety of well-drained soil mediums and has a medium tolerance to salt spray.