- The delicate flowers of a spirea bush welcome spring in zone 4 landscapes.spirea image by Alison Bowden from Fotolia.com
If you live in USDA Hardiness Zone 4, you know temperatures in the winter months can drop to -20 to -30 degrees F. What this means for your landscape plants is that the roots must be hardy enough to withstand deep frozen ground and have the ability to bloom during a shorter growing season. Adding blooming shrubs to your zone 4 landscaping can brighten your yard with color from late spring through summer.
- Spirea bushes, particularly the old-fashioned bridal wreath species, have been a part of northern landscapes for decades. Today, over 80 species of spirea exist, with many more varieties within these species to meet your landscape needs. Spirea bushes are easy to care for, blooming in late spring, though some varieties bloom in late June to give your yard a spot of color. Spirea blossoms can come in shades of pink, rose, purple, blue or white. In the fall, many spirea varieties have colorful foliage, which adds to the shrub's appeal for gardeners in USDA Hardiness Zone 4.
- Although several species of weigela bushes exist, the weigela florida species is ideal for landscapes in USDA Hardiness Zone 4. A member of the honeysuckle family, the weigela florida bursts with trumpet-shaped flowers, ranging in color from pink and wine to white. Weigela florida shrubs are moderate to fast-growing when planted in full sun with a well-draining soil.
- Summersweet bushes, also called pepper bush, white alder or spike alder, not only is hardy in USDA Hardiness Zone 4, but thrives in a damp or moist environment during the summer. Unlike many flowering shrubs that bloom in the springtime, the summersweet bush blooms in late July through August with fragrant spikes of flowers, ranging in color from shades of pink to white. Its care is similar to rhododendrons, preferring light shade to full sun, and an acid-based soil.
- Witch hazel is often overlooked for northern landscaping, but adding the shrub to your yard will surprise you when the bush flowers in late fall or early winter. The common witch hazel bush can grow quite large, though there are species and varieties that will remain smaller. The attractive, fragrant yellow flowers may even bloom after the first snow, making it an ideal shrub for USDA Hardiness Zone 4 and below.