Alert: Limited Online Availability

Now that summer is here, we have limited our stock for online purchase. Find Monrovia plants at your local garden center. Pre-order for 2023 will be available later this year. ×

Blue Dune Lyme Grass

Elymus arenarius 'Blue Dune'

Striking silver-blue foliage is a standout in any landscape. Highly effective when paired with purple flowers or plants with maroon foliage. Produces wheat-colored plumes in summer. Foliage clumps spread vigorously by rhizomes; very useful for filling in large areas quickly and for erosion control. Very heat tolerant.
There are very few rules in gardening, but perhaps the most important one is to work within your zone. Choosing plants that grow and thrive in your particular climate is the very first step toward having a beautiful garden . Learn More

Your climate might be too cold for this plant:


Full sun, Partial sun

Once established, water occasionally; more in extreme heat.

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Due to the seasonal nature of plants, availability at your local garden center is not guaranteed. Give them a call before visiting.

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Botanical PronunciationEL-ih-mus ar-en-AR-ee-us
Average Size at MaturityQuickly forms clumps 2 ft. tall and wide; 3 ft. tall in bloom.
Bloom TimeLate Summer
Deciduous/ EvergreenHerbaceous
Flower ColorBrown
Foliage ColorSilver-blue
Garden StyleCottage, Mediterranean, Rustic
Growth HabitSpreading
Growth RateFast
Landscape UseBorder, Erosion Control, Firescaping/Firewise, Mass Planting, Rock Garden, Hillside, Wildlife Garden, Ground Cover
Light NeedsFull sun, Partial sun
Soil NeedsAll-Purpose Plant Food
Special FeatureClump Forming, Dramatic Foliage Color, Easy Care, Extreme Cold Hardiness, Naturalizes Well, Waterwise, Fast Growing, Bird Friendly
Water NeedsLow
Watering NeedsOnce established, water occasionally; more in extreme heat.
Companion PlantsNinebark (Physocarpus); Catmint (Nepeta); Potentilla (Potentilla); Shrub Rose (Rosa); Cranesbill (Geranium)

Grows easily in a wide range of soils; less vigorous in dry, clay soils. Water regularly in first growing season to establish an extensive root system. Once established, reduce frequency; tolerates periodic dry spells. Space 2 to 3 ft. apart as groundcover; closer for faster coverage. May be cut back in late spring to rejuvenate foliage.

This Plant's Growing Zones: 4-9

USDA Cold Hardiness Zone Map

Your USDA Cold Hardiness Zone:

Your climate may be too cold for this plant