What year-round interest means
“Year-round” does not have to mean evergreen. Most ornamental grasses that look good in winter are deciduous: the foliage turns tan, gold or bronze, and the stems and seed heads stay standing. That standing structure, especially when frosted or topped with snow, is a big part of why gardeners value grasses.
If you specifically want grasses that keep green foliage in winter, see our companion article on evergreen ornamental grasses that stay green all year. This article takes the wider view: how to combine plants so something is attractive in every season.
A season-by-season look
- Spring: New growth emerges. Cool-season grasses such as feather reed grass and blue fescue green up early. Variegated and golden selections (for example Hakonechloa or golden sedges) stand out now.
- Summer: Plumes appear on early bloomers such as ‘Karl Foerster’. Warm-season grasses put on fast growth and begin to flower in midsummer.
- Fall: Foliage color deepens and seed heads mature (see ornamental grasses for fall color). Little bluestem turns copper and red, switchgrass often turns gold or burgundy, and pink muhly grass flowers in clouds.
- Winter: Deciduous grasses fade to buff tones but keep their shape, while evergreen grasses and sedges hold their color. Seed heads feed birds.
Best grasses for four seasons
Hardiness and heights vary by cultivar, so confirm with the plant tag.
- ‘Karl Foerster’ feather reed grass: early plumes, a very upright habit that holds through winter, and a long season of interest.
- Maiden grass (Miscanthus sinensis), including compact cultivars such as ‘Adagio’: arching foliage, late-summer plumes and silvery seed heads that persist into winter.
- Little bluestem (Schizachyrium scoparium): blue-green summer foliage, then red-orange fall color that can hold into winter.
- Pink muhly grass (Muhlenbergia capillaris): late-summer to fall flower clouds, then tan plumes. See how to grow pink muhly grass.
- Switchgrass (Panicum virgatum): upright structure, airy flowers and good fall color.
- Fountain grass (Pennisetum alopecuroides), such as ‘Hameln’: soft plumes in summer and gold foliage in fall.
- Blue fescue (Festuca glauca): holds its silver-blue color across multiple seasons in many climates.
- Sedges (Carex): often evergreen in mild climates, providing foliage color all winter.
What to plant with Karl Foerster grass
Because ‘Karl Foerster’ is so upright, it pairs well with plants that have rounder or flatter shapes. Common companions include sedum, coneflower, black-eyed Susan, asters, salvia and catmint; see perennials to plant with ornamental grasses for more. Choose companions with a similar sun and soil preference: full sun and average, well-drained soil suit all of the above.
Tall and fast-growing options
Readers often ask which ornamental grass is tallest or fastest growing. Giant miscanthus and giant reed are among the tallest, reaching 10 feet or more, but giant reed is invasive in some areas, so check locally. Switchgrass, big bluestem, Indian grass and many Miscanthus cultivars give strong height without that concern. Growth speed depends on the species and conditions, and warm-season grasses typically put on most of their growth in summer once the weather warms.
Keeping winter interest: when to cut back
The main way to lose winter interest is to cut grasses back too soon. Deciduous grasses can stand through winter and be cut in late winter or early spring, just before new growth starts. In fire-prone areas, many gardeners shorten them in fall instead. Our article on whether all ornamental grasses should be cut back in spring covers the timing for each type.
How late can you plant
Spring and early fall are the best planting times. If you plant in fall, aim to get the plants in the ground at least 6 to 8 weeks before the first expected frost, so the roots have time to settle. Warm-season grasses planted late in fall are at greater risk in cold climates. For a full year of care, see how to care for ornamental grasses, and for a broader overview, types of ornamental grasses.