Delosperma (Red Mountain and Mesa Verde Iceplant) and Actostaphylos x coloradoensis (Panchito Manzanita)

Dry Xeriscape Garden

Erigonum umbellatum (Kannah Creek Buckwheat)

Delosperma (Red Mountain and Mesa Verde Iceplant)

Related Posts:

• The 20 Best Xeriscape Plants for Colorado
• The Top 10 Benefits of Making Landscaping More Water Efficient
• How Much of my Water Goes Toward Irrigating my Landscaping?
• Arvada Residential Landscape Makeover
• Up to $25,000 Rebates Available through 2010 Aurora Xeriscape Program

That being said, I do think a small list can be helpful to people who are new to the area, or are not familiar with the available plant choices and may be overwhelmed by a catalog of thousands of plants.   Although this is a Colorado list, most of these plants can be used in many places throughout the world depending on the local climate.

• Fernbush – Chamaebatiaria millefolium    Fernbush is a medium sized shrub with interesting fern-like leaves that persist throughout the winter.  This shrub requires little water or maintenance, and produces clusters of small white flowers in the late spring through early summer.
• Agastache - Agastache ssp.    Agastache, or hummingbird mint, is a fragrant group of colorful perennial herbs that is available in many colors mostly ranging from orange to pink.  The plants are covered with beautiful tubular flowers from mid-summer to fall.  Hummingbirds absolutely love these plants.
• Panchito Manzanita - Arctostaphylos x coloradoensis ‘Panchito’    Panchito Manzanita is a low growing woody shrub with shiny, oval, dark green leaves that persist throughout the winter.  It gets small, pale pink flowers followed by small red berries- but it’s best characteristics are the evergreen foliage and the fact that it requires little care or water.  For more info read my previous post dedicated to this plant.
• Yarrow - Achillea ssp.    Yarrow is a group of Rocky Mountain native perennials that are available in many colors, ranging from yellow, to white, to red.  The plants are very drought tolerant, requiring almost no watering once established.  Fern-like, finely dissected leaves form clumps at the base of the plant, often naturalizing and spreading.  Flowers are produced on stiff, tall stalks throughout the summer.
• Spanish Gold Broom - Cytisus purgans ‘Spanish Gold’    Spanish Gold Broom is a medium sized deciduous shrub that is native to the Mediterranean.  In late spring it is covered with small yellow pea-like blossoms.  This shrub grows in a mounding, cascading form of bright green stems that remain green throughout the winter.  The small leaves drop by mid-summer.
• Catmint - Nepeta ssp.    Catmint is a widely used mint that produces an abundance of blue flowers.  The reasons that I like this plant are first, that it is one of the earlier Xeriscape perennials to emerge in the spring to form an attractive clump of blue-green foliage, and second, that it flowers all summer long and requires zero maintenance.
• Iceplant - Delosperma ssp.    The Iceplant that we use in Colorado is a perennial that is native to the higher elevations of South Africa.  Note that this is not the invasive Iceplant that is a problem in Southern California.  Delospermas form a ground-hugging mat of succulent leaves that range from grey to green.  The plants are coated with shiny, delicate flowers in colors from red, to purple, to pink, often with different colored centers.  One of my favorite plants.
• Blue Avena Grass - Helictotrichon sempervirens    Blue Avena Grass is a striking addition to any landscape.  Large clumps of blue-gray leaves give this grass a unique texture and contrast among other plants.  In mid-summer a large group of tan seedheads gracefully arch from the plant and stand out from the blue foliage.  Like most grasses, Blue Avena requires little maintenance or supplemental watering.
• Penstemon - Penstemon ssp.    Penstemon is another group of Rocky Mountain native perennials that requires little watering once established, preferring well drained soils. Penstemons are available in just about every color.  These plants are small in size which makes them ideal for filling in between other Xeriscape plants.  They provide an abundance of colorful blooms that attract butterflies and hummingbirds.
• Mojave Sage - Salvia pachyphylla    Mojave Sage is a large shrubby perennial that produces an abundance of striking purplish-blue flowers throughout the summer.  The silver-green foliage really stands out too, growing up to 3 feet tall, and persisting as a semi-evergreen throughout the winter.
• Prairie Winecups - Callirhoe involucrata    Prairie Winecups is a Colorado native perennial that grows in a low mound of trailing stems covered in round dark-green leaves.  The plant produces a large number of cup shaped wine-red colored flowers from late spring through summer.  Because this is a native plant it is well adapted to our local climate and requires little maintenance.
• Mexican Feather Grass - Nassella tenuissima    Mexican Feather Grass has a fine, hair-like form that gives this grass a texture like none other.  Early in the summer the fine tufts of grass are bright green, then they fade to a striking golden yellow in the mid summer through the fall and winter.  The way that this grass moves in the breeze brings a graceful movement to the landscape.
• Torch Lilly - Kniphofia ssp.    Torch Lillies are interesting because of their unique foliage and flowers.  The foliage is grass-like, and grows in thick clumps ranging in color from blue-green to dark green.  The flowers are produced in a tight bunch on tall spikes, and the flowers open from the bottom of the spike upwards.
• Crimson Pygmy Barberry - Berberis thunbergii ‘Crimson Pygmy’    Crimson Pygmy Barberry is a compact deciduous shrub with small red leaves and stems.  The red color makes an excellent contrast with the tan and blue hues of the late summer Xeriscape.  This shrub is easy to care for, and maintains a very compact and dense form.
• Agave - Agave ssp.    Agave is native to the Southwestern United States and Mexico, and it thrives in hot, dry locations.  Most of the Agave’s have beautiful thick blue foliagewith spines on the tips of the leaves.  A very low maintenance plant for dry southern and western exposures.
• Prairie Coneflower - Ratibida ssp.    Prairie Coneflower is a tall, vigorously growing perennial that requires little maintenance and produces flowers throughout the summer.  The foliage is bright green, and available flower colors include yellow with dark brown centers, and burgundy red with dark brown centers.  The seeds are easy to harvest and sow the following spring.
• Creeping Western Sand Cherry - Prunus besseyi ‘Pawnee Buttes’    Creeping Western Sand Cherry is the low growing form of Western Sand Cherry that is native to the Rocky Mountains.  The plant has bright green leaves, and produces fragrant white flowers in the spring, followed by small black fruit that attract birds and wildlife.  In the fall, the leaves turn to beautiful shades of burgundy and red.
• Coral Bells – Heuchera ssp.    Coral Bells are a widely used favorite because they are easy to grow and care for. The large leaves are available in a variety of hues from light green, to burgundy, to silvery green. Coral Bells does very well in shade to partial sun.  Available flower colors range from white to red, and are produced on slender stalks in late spring to early summer.
• Yucca - Yucca ssp.    Yuccas are native to the Southwestern United States and Mexico.  There are many different varieties to choose from with various forms of stiff sword-like leaves ranging from dark green to blue-green.  Yuccas are a true evergreen that brings form and structure to the landscape year-round.  Most Yuccas produce large showy spikes of white bell shaped flowers in mid summer.
• Apache Plume - Fallugia paradoxa    Apache Plume is large native deciduous shrub with whitish stems and branches covered with small light green leaves.  Some of the leaves persist throughout the winter.  The shrub produces single white flowers in mid summer, followed by the very unique and attractive rose and pink colored plumes that give this plant it’s name.  A very unique and versatile shrub that grows vigorously in it’s native habitat of Colorado. 

The Criteria for this List:
- This list is for the Front Range of Colorado.  We are somewhere in the middle of zone 4 to 5 on the USDA Plant Hardiness Zone Map.  I will plan to follow up with a separate post for the mountain areas located above about 7,000 feet in elevation.

- I have only included plants that are very easy to care for, and have excluded plants that require a lot of water since that is a key component of Xeriscape.  The “best” plants, in my opinion, are those that are well adapted to the local climate and do not require much additional water and maintenance.  Of course there are occasions where the use of higher water-use plants is desirable, such as in drainage areas, however I have left them off of this particular list.  And if this were a list of my personal “favorite” plants then I would probably include some that require a little extra care.

- I am not a botanist- I am a landscape architect.  This means that I am far from an expert on the science and anatomy of plants.  Instead, I am influenced by characteristics such as:  how the plant works in an overall design, its adaptability to a variety of sites, the colors and form of the foliage, the availability and cost of the plants, etc.

- This list includes a good mixture of evergreen and deciduous shrubs, perennials, and ornamental grasses that will provide a variety of color, texture, and interest throughout each of the seasons.  I have excluded trees, bulbs, and annuals for the purpose of this list.  There are so many of each to chose from that I will provide future lists for each category.

Related Posts:

• The Top 10 Benefits of Making Landscaping More Water Efficient
• Scenes from a Colorado Garden – June 2010
• How Much of my Water Goes Toward Irrigating my Landscaping?
• Up to $25,000 Rebates Available through 2010 Aurora Xeriscape Program
• Simple Landscape Maintenance Tips for Winter

Panchito Manzanita is one of my favorite plants- and not just because the name is so fun to say.  What sets this plant apart is that it’s:  1) low-growing, 2) evergreen , and 3) it can handle full sun and minimal watering.  That combination can be difficult to find outside of the standard limited options like the low-growing junipers. 

As we convert more lawn areas into Xeriscape to save water, I think the use of evergreen plants is a vital design element to help replace some of the green color of the replaced lawn that is lost.  Panchito Manzanita is an excellent choice because it looks great year-round, stays fairly compact, and requires little maintenance.

PLANT STATS
Scientific Name:  Arctostaphylos x coloradoensis
Plant Type:  Evergreen Shrub
Mature Height:  12-24″
Mature Spread:  18″-48″ (quite variable, depending on conditions)
Water Requirement:  Low- may need more water the first growing season, but requires little water once established.
Exposure:  Full Sun to very light shade
Best Features:  Unique evergreen foliage consisting of leathery 1″ long leaves.  This plant really looks great year-round.
Flowers:  Small urn-shaped pink to white flowers from February to April
Winter Interest: Very attractive evergreen foliage, reddish colored stems and bark
Disadvantages:  Slow grower the first season or two
Availability and Sizes:  I have been told that this plant is quite difficult to propagate- therefor It can be a little hard to find.  As it gains more popularity and demand for it goes up, it should be available in larger quantities.  Usually it is sold in 1 gallon size containers.  Since it is slow-growing, a 5 gallon size shrub would be even better. 
Maintenance Tip:  A low maintenance plant.  You may want to prune a branch or two here or there.
Other:  Named to Plant Select in 2006.  Do not confuse with Arctostaphylos uva-ursi, which prefers much more moisture and shade. 

Related Posts:

• Scenes from a Colorado Garden – June 2010
• The 20 Best Xeriscape Plants for Colorado
• Vermilion Bluffs Mexican Sage – A Long-Flowering Perennial and a Hummingbird Magnet
• Diabolo Ninebark – A Useful Shrub with Intense Foliage Color

PLANT STATS
Scientific Name:  Salvia darcyi ‘Pscarl’
Plant Type:  Perennial
Mature Height:  36-48″
Mature Spread:  30-42″
Water Requirement:  Low
Exposure:  Full Sun to partial shade- best in full sun.
Best Features:  Intense cardinal red flowers that hummingbirds love.
Flowers:  Bright cardinal red tubular flowers from July through October.
Winter Interest:  Minimal
Disadvantages:  Does not perform well in poorly drained soils.  Late to emerge in spring.
Availability and Sizes:  This plant was introduced in 2007, but is already available through most retail and wholesale nurseries.  Commonly available in 1 gallon size, or in flats of smaller pots.  I would recommend the 1 gallon size.
Maintenance Tip:  Mulch heavily over the winter to protect from hard freezes.
Other:  Leaves and stems are very aromatic.  Salvia darcyi was originally collected in the Sierra Madre Oriental in Mexico.  Named to Plant Select in 2007.

Related Posts:

• Scenes from a Colorado Garden – June 2010
• The 20 Best Xeriscape Plants for Colorado
• Panchito Manzanita – A Low-Growing Evergreen for all Seasons
• Diabolo Ninebark – A Useful Shrub with Intense Foliage Color

Diabolo Ninebark is a large, drought tolerant deciduous shrub with intense reddish-purple color.  Ninebark has been around for a while but I had not used it before in any of my designs or in my own garden.  Thanks to Stefan at Arbor Valley Nursery for recommending this versatile plant!

I was looking for a large shrub that would provide screening along the inside of an open-rail fence.  I wanted something that could handle the full sun and dry conditions, and that would get large enough to provide the screening that the client desired.  Mountain Mahogany (Cercocarpus ledifolius) was my first choice, but in a 5 gallon size it was very small and spindly, and it is a slow grower- my client wanted some impact right way (note the size in the photo).  Diabolo Ninebark provided the perfect solution. 

PLANT STATS
Scientific Name:  Physocarpus opulifolius ‘Diabolo’
Plant Type:  Deciduous Shrub
Mature Height:  6-8′
Mature Spread:  6-8′
Water Requirement:  Low
Exposure:  Sun (will handle part shade, but is said to have the best color in full sun).
Best Features:  Intense foliage color.
Flowers:  Clusters of creamy white flowers in mid summer.
Winter Interest:  Limited.  Bark tends to peel, which can be interesting.
Disadvantages:  None known to me.
Availability and Sizes:  Readily available for retail and wholesale purchase.  Typically found in a 5 gallon container size.
Other:  I think this plant would be a great replacement for Purple Leaf Plum, which requires more water, is susceptible to disease problems, and (in my opinion) is somewhat overused.

Related Posts:

• Scenes from a Colorado Garden – June 2010
• The 20 Best Xeriscape Plants for Colorado
• Panchito Manzanita – A Low-Growing Evergreen for all Seasons
• Vermilion Bluffs Mexican Sage – A Long-Flowering Perennial and a Hummingbird Magnet