2. Color: Who can resist the bright and rich greens, bronzes, tans, and even reds of grasses, a constantly shifting display of color throughout the year? From the moment they emerge from the ground to when they get cut back in the spring, grasses put on a show of sometimes subtle, sometimes stop-in-your tracks color variation.
3. Play with light: If you’ve ever seen bright-red Japanese bloodgrass (Imperata) in summer or copper little bluestem (Schizachyrium scoparium, above) in autumn backlit by the sun, you have experienced a thing of true beauty. Sometimes it’s the foliage that gets highlighted, sometimes the flowers, and sometimes both; when you’re thinking about where to site grasses, keep in mind where the light comes from; backlighting can have a really dramatic effect.
4. Movement: Most grasses are very light and airy, and therefore catch the slightest movement of air. There’s something enchanting about seeing grasses dancing and shimmering in the breeze.
5. Seasonal interest: Most grasses offer almost four whole seasons of interest. There’s about a month in the early spring when they get cut back (hence the note to self about bulbs to fill in the gaps), but other than that they put on a great show year-round with changing colors of foliage and flowers, and with texture as well. Like evergreens but with more variation, they provide a kind of structure and continuity in the garden as other plants around them appear, grow, bloom, fade, and go dormant again.
Other great reasons to use grasses:
7. Sound: Many ornamental grasses make a rustling sound when moved by the breeze, bringing an element of sound into the garden. That gentle “ssshhh” adds another layer to the sensory experience, and can even stand in for visual elements in gardens for the visually impaired.
8. Critter-proof! Whether you’re battling squirrels, deer, Japanese beetles or any other kind of pest, grasses are pretty tough. Most animals (other than my dogs – they love to chew on some of my grasses!) don’t like them.
9. Low maintenance: As mentioned above, most ornamental grasses are pretty good at fending for themselves. Other than being cut back in the spring, they don’t need the pruning, staking, deadheading, raking, etc. that we have to do for our other beloved garden inhabitants.
10. Good in containers. Grasses do well in pots and other containers, making them excellent candidates for small-space, rooftop, and other types of container gardens. They can act as nice vertical and or/softening accents, they are often drought- and wind-tolerant, and they (usually -see below!) get along well with their neighbors.
Caution Caveat: A few species of ornamental grasses (especially pampas grass) have very sharp blades (I guess they don’t call them blades for nothing); if you’re using grasses for a children’s garden or another space where people might grab hold or have to brush past, make sure to plant the kinder, gentler, touch-friendly species.
Also, a few species of ornamental grasses do not make good neighbors; they can be a garden nuisance (Hakonochlea and Stipa tennuissima, for example) or even a threat to native grasses and other flora (especially pampas grass, runner bamboos, and varieties of Miscanthus in some parts of the country). So whether it’s your own garden and especially if it’s a garden for a client, do your homework: Make sure you’re not saddling yourself or someone else with a lovely but unruly beast! Here are a couple of articles to start you off: “Native and Invasive Ornamental Grasses” and “Bad Boys of Ornamental Grasses.“
Oh, and one more thing: Here’s an interesting article on caring for ornamental grasses – turns out it depends on whether they are really grasses (vs. sedges or rushes). Thanks to gardenmentor for sending me the link on twitter!