PlantFiles: Mondo Grass
Ophiopogon japonicus

I agree with csd. I advise anyone in the San Antonio area not to plant it.. It does fine for a couple of years and then it starts taking over and I know of no way to get rid of it.

I have this plant in my yard and I can't get rid of it! I installed a new landscape in my "devil's strip" involving dwarf mondo grass, junipers and mulch; the standard mondo grass will not be killed! We have dug, sprayed with double strength Roundup Pro, tilled, put landscape fabric doen and covered that wil thick mulch-they still come up....right through the fabric. It looks awful with my new plantings, and all the little sprigs popping up everywhere; we keep pulling, and it keeps growing in. Does ANYONE know a surefire way to get rid of this invasive plant short of dousing it all with gasoline and/or torching the bed?
WARNING-do not plant this in central Florida unless you want it forever!

In the spring 2004 I interplanted several plugs of Mondo Grass among daylilies in my western NY garden. Several earlier attemts over the years had failed to overwinter so I had little hope this time. To my surprise all of the plants survived our normal winter outdoors and one even produced a flower stalk with faintly purple-pink flower umbels -the first time ever! See the attached image. If this experiment ends successfully it will make a welcome addition to the other grass-like flora in this area of the garden.

I have done what Suncatcheracres mentions in the notes on this plant. I have devoted an entire approx. 40 ft x 40 ft area of my 1/2 acre garden to Mondo grass and liriope so that I never need to mow it! I was fortunate that there was already a healthy stand of Mondo grass along with scattered and various forms of Liriope muscari in this area of my garden when I bought my house. I found other sites in my yard where the Mondo and Liriope had established themselves, along with numerous sprigs of each in isolated locations, possibly planted in bird droppings from digested seeds. I was also working part-time to assist a landscaper friend with his business. We often thinned out Mondo and Liriope beds for his clients, and even pulled up large, healthy plantings of it when the client wanted a different landscape design. I finally amassed enough Mondo and Liriope "plugs" to fill the 40 ft by 40 ft area under a large old live oak and surrounding my dogwood tree. With frequent weeding to reduce competition, the "plugs" have reproduced and spread rapidly. I don't need to do much weeding at all now in one area where the Mondo and Liriope are best established and the other areas continue to fill in as the Mondo and Lirope spreads and eliminates root space where weeds might grow in the other areas.

For those in Zone 8b or below that might want some added interest from flowers (which are not really very showy on either Mondo or Liriope), you can do as I have done and interplant with Chlorophytum comosum (a/k/a Airplane Plants or Spider Plants). To me, the leaves of C. comosum are almost indistinquishable from Mondo and Liriope when massed closely together, but the arching flower spikes of C. comusum add a nice touch of white flowers to the Mondo and Liriope throughout the growing season.

I have intermixed all sorts of sizes and varieties of Mondo and Liriope, variegated and plain, very tall and dwarf, in this area. They all seem to blend well together and, when established en masse, certainly make weeding easier and eliminate the need for mowing. Plus, this area of my garden has a very lush, deep green, serene, cool atmosphere that I don't think could be achieved with lawn grass or most other ground covers.

While id does grow nicely and spread in full shade, the blooms are terribly sparse and disapointing, even when it gets some sun. Not bad, but not very impressive either.

Very nice border plant... i can be divided quite easily every couple of years.

We bought some last year at a plant sale and it did not seem to like the original place where planted. We have moved it and it is now begining to spread. I love mondo grass.

Mondo is my favorite ornamental grass and on my buy list next time I see it. grows 8"-16", usually with white or white tinged with lilac flowers. Cultivar "caeruleus" is dark green leaves with violet-blue flowers. I see it ofen in plantbeds, popular at commercial buildings. It grew well at my family home in sandy soil and salt air.

Mondo grass is an old heirloom plant of the Southern USA where it is used to fill in as a shady ground cover, often in difficult places where other plants won't grow, or among the shady roots of trees where it is difficult to mow. Over time it will slowly spread by underground stems which are tuberlike. It is short, six to eight inches tall, and dark green. Supposedly it is very easy to divide and can be cut back in the Spring after a hard winter makes it look ragged. The roots will die at about 10 degrees F. With patientce, one could establish a whole shady "lawn" with this plant, that would never need mowing, if you can find it to buy.

I purchased two small pots, for $2.50 each, at a green market in High Springs, Florida, this Spring, and once the pots were divided I had over 30 sprigs. The pots were incredibly rootbound, and I had to divide with garden cutting shears, and I still had cuts on my hands from separating the many sprigs, as the roots are very wiry. They are now planted under the shade of a very old native holly tree that is about 40 feet tall, in the front of a Southern Indica azalea bed. I planted them in a border, in the Southern traditional manner of "border grass," but I believe I will eventually just let this plant form a shady ground cover in these beds.

This plant is a good substitute for it's larger and lighter colored "look alike," the other traditional "border grass," Liriope, but in a shadier situation. There are named varieties, especially dwarf kinds like 'Kyoto Dwarf,' 'Nana,' and 'Gyoku Ryu,' which is only 3 inches tall.

O. planiscapus 'Nigrescens' is called "Black Mondo Grass," to 10 inches with white flowers, but I've read it won't make a solid cover like the regular Mondo Grass. Plus it is very expensive to buy, again if you can find it.