Spirea shrubs are a popular choice for landscaping in Iowa due to their ease of care, beautiful blooms, and hardy nature. There are many different types and varieties of spirea shrubs available, each with its own unique characteristics.
Popular Spirea Types:
Bridal Wreath Spirea: This variety is known for its cascading branches of white flowers, which bloom in the spring. Hardiness Zone: 4-8. Height: Bridal Wreath Spirea usually grows to a height of about 6 to 9 feet (1.8 to 2.7 meters) tall. Width: The spread or width of Bridal Wreath Spirea can be similar to its height, often reaching a width of about 6 to 9 feet (1.8 to 2.7 meters) when fully mature. The arching branches give the shrub a rounded, wide-spreading form. Leaf: Small, rhombic to ovate, coarsely-serrated, dark blue-green leaves. Flower: Tiny white flowers appear in umbellate clusters that profusely covered the leafy branching. Bloom Time: Late April, May Bloom Size: Large
Japanese Spirea (Spiraea japonica): Japanese Spirea comes in various cultivars, each with its unique foliage color and growth habit. They are known for their vibrant flowers, ranging from pink to red, and are relatively easy to care for.
- Hardiness Zone: 4-9. Plant Height x Width: 3' x 4' Leaf: Leaves emerge as bronze-red in spring, turn to yellow-green by summer, yellow-orange-copper in fall. Flower: Tiny pink flowers in corymbs. Bloom. Time: Spring Bloom Size: Small
Anthony Waterer Spirea This spirea variety is appreciated for its striking clusters of deep pink flowers. It's a compact shrub, making it suitable for smaller gardens or as a border plant.: This dwarf variety produces pink flowers in the summer and has a compact, mounded shape.
- Hardiness Zone: Anthony Waterer Spirea is generally hardy in 4 to 8. Height: Anthony Waterer Spirea typically grows to a height of around 2 to 3 feet (0.6 to 0.9 meters) tall. Width: The spread or width of Anthony Waterer Spirea is similar to its height, often reaching a width of about 3 to 4 feet (0.9 to 1.2 meters) when fully mature.
Neon Flash Spirea: This variety has striking pink flowers that bloom in the summer and bronze-red foliage in the fall.
Hardiness Zone: Neon Flash Spirea is typically hardy in zone 4 to 8. It is well-suited for various climates within these zones.
Height: Neon Flash Spirea usually grows to a height of around 2 to 3 feet (0.6 to 0.9 meters) tall.
Width: The spread or width of Neon Flash Spirea is similar to its height, often reaching a width of about 3 to 4 feet (0.9 to 1.2 meters) when fully mature.
How To Care For Spirea:
Watering: Spirea shrubs prefer moist, well-drained soil. Water them deeply and regularly, especially during the hot and dry summer months.
Fertilizing: Apply a balanced fertilizer in the spring to help promote healthy growth.
Pruning: Prune your spirea shrubs in the spring or fall to remove any dead or damaged branches, and to maintain their shape. Some varieties, such as Bridal Wreath, bloom on old wood, so it's important to prune them immediately after they finish blooming.
Pest control: Spirea shrubs can be susceptible to pests such as aphids, spider mites, and scale insects. Inspect your plants regularly and treat any infestations promptly.
Spirea shrubs are typically perennial, meaning they live for several years and return each growing season. However, some varieties, such as the Japanese Spirea 'Magic Carpet,' are considered annuals in colder climates, as they may not survive the winter.
Spirea shrubs are deciduous, meaning they lose their leaves in the fall. They typically grow in a rounded or mounded shape, with delicate, feathery foliage. The flowers range in color from white to pink to red, depending on the variety. The shrubs can grow anywhere from 1 to 8 feet tall, depending on the species and growing conditions.
Spirea shrubs are well-suited to Iowa's climate for several reasons. First, they are cold-hardy, able to withstand the harsh winters that can occur in the state. Second, they are drought-tolerant, making them a good choice for the hot and dry summer months. Third, they can grow in a variety of soil types, from sandy to clay soils. Finally, their beautiful blooms provide interest and beauty to the landscape, making them a popular choice for borders, hedges, and other landscaping applications.
Spirea shrubs are a hardy, low-maintenance, and beautiful option for Iowa gardeners looking to add some color to their landscapes.