Water Conservation in the Garden: Principles of Xeriscaping

Pergola and Patio in WaterWise Garden by Native Design, Helena, Montana

World Water Day is tomorrow, March 22, 2013 and Earth Day on April 22 this year. Mother’s Day is on May 12th, a good day to honor our human mothers as well as our Earth Mother. 

To celebrate World Water Day, I thought I’d write about water conservation, and include a number of photographs of gardens I have designed around Helena, Montana, using the 7 main priciples of Xeriscaping, or, as I like to say, WaterWise garden design. I hope you find some inspiration in these photos. If you have any questions about the gardens in this post, please email me or comment below. Thanks! 

Trumpet Honeysuckle "Mandarin" in garden by Native Design, Helena, Montana
A colorful drought-tolerant vine that also smells delicious and attracts hummingbirds and butterflies, this hardy Honeysuckle vine also create shade and privacy on the back patio.

Private Front Yard Garden by Native Design, Helena, Montana
Front yards do not have to be just a few shrubs and trees surrounded by expanses of thirsty lawn. If you have a small property, make use of the front yard to create usable outdoor rooms. This waterwise garden provides plenty of privacy and several different activity zones in a little over 900 square feet. What was originally an open, dry lawn now has a 6 ft privacy fence, arbor and gate, two patios, a shade pergola and a colorful xeriscaped garden. (see concept sketch below)

Conceptual Sketch for Garden Design by Native Design, Helena, Montana

Large Garden Deck in Landscape by Native Design, Helena, Montana
More often than not, suburban back yards are just a weekend mowing and watering chore. Why not replace a huge lawn with a series of decks that are not only more attractive and easier to maintain — but add to the square footage of your liveable space? This deck in a WaterWise landscaped back yard provides at least four different “rooms,” one specifically designed for watching sunsets.

Small Private Garden with Cedar Fence by Native Design, Helena Montana
A privacy fence creates a whole different feeling in the backyard, making it perfect for quiet visits, reading or shaded dining on hot summer evenings. Birds are attracted to the running water in the pond, and butterflies feed on flowering perennials and vines.

Overflowing Water Feature by Native Design, Helena Montana
Xeriscapes can include water features. Here, an overflowing urn appears to flow into a dry stream bed. The bright blue color and sound of bubbling water create a focal point in this garden.

Garden Pond Plantings by Native Design, Helena Montana
Pondside plantings include native irises, corkscrew rush and tufted hair grass which will mature to a graceful arching clump grass


Rain chain near front door of courtyard garden, Native Design, Montana
Xeriscaped front yards do not have to be all gravel, juniper, yucca and potentilla. In fact, a well-designed xeriscape can look much more attractive and welcoming than a mostly-lawn entry garden. Here, sumac, hosta and native ferns share a plant bed next to the front porch, where a Japanese “rain chain” directs roof runoff into a drainage pipe disguised by a dry stream bed of black rocks. Spilling onto the stone paved front patio are drought-tolerant groundcovers such as creeping thyme, artemisia and snow-in-summer.


Xeriscaped Front Garden with Slate and Boulders by Native Design, Helena Montana
A xeriscaped entry garden with just the smallest circular lawn for a cool green sitting spot. The rest of this front yard is slate walkways and patio, a Mediterranean-style gravel garden, and planted terraces with aspens for shade and privacy

Slate Landing along street at garden entry point, Native DesignSlate paving provides a comfortable spot for guests to approach the front garden of this home. Steps leading down into the entry garden are flanked by aspen trees, daylilies, ornamental grasses and colorful flowering perennials.

Hillside Terraced Garden by Native Design, Helena, Montana
A grand entry experience greets guest to this home built on a steep slope above the road. There is no lawn at all in this xeriscaped garden. Instead the slope is tamed by a series of stone terraces and slate steps that create lots of liveable space on an otherwise unusable slope. The dramatic focal point of this planting is Karl Foerster Feathered Reed Grass.


Enter this driveway through a small grove of native aspens mulched with smooth river rock. The aspens frame visitor’s view of this grand brick home in the Helena Valley.

Xeriscaping and Native Planting by Native Design, Helena, Montana
A drainage problem prompted design of this dry stream bed to handle roof runoff during storms. Boulders and pebbles meander through drought-tolerant shrubs and perennials with a clump of aspens. Daylilies, Siberian Iris, Coreopsis, Potentilla, Russian Sage and Arctic Willow make a striking accent planting near the front door of this home.

Hops Vine on Trellis by Native Design, Helena, Montana
Xeriscapes can include vines such as this Hops vine to cover unsightly fences and block walls, or to create shade and privacy as in this photo. Here, the hops grows on a trellis on the west side of a porch, creating a cool spot to sit outside on hot summer evenings.


In our hot, dry Helena summers, shade is an important landscape element and fits well with any xeriscape design. Here, a pergola attached to the south side of this home provides shade not only for the stone patio, but also for some of the plants in the beds around it. Honeysuckle and Clematis vines are planted at the base of each post to eventually grow up and over the pergola. Aspens planted in clumps augment the pergola’s shade as they mature.

Pergola Shade Structure with Native Plants, by Native Design
A cedar pergola planted with vines shades this stone patio and bench-height retaining wall. Xeriscape principles followed in this design include thoughtful planning, low-volume irrigation, drought tolerant plants located in groups according to their water requirements, low-maintenance, improved soil, shredded bark mulch to retain soil moisture, extremely small lawn area and a native grass meadow.

Shady Private Garden with Aspens and Patio, by Native Design
A xeriscaped back yard has two circular stamped-concrete patios shaded by a small aspen grove, stone terraces planted with native drought-tolerant plants and a very small lawn area.

Courtyard Garden Sitting Area and Stone Wall by Native Design, Helena, Montana
This could be a front garden or back yard dining area. There is no lawn at all in this xeriscape. Instead the homeowners chose to install a paved patio surrounded by this stone retaining wall. Paved area tend to retain heat and can get uncomfortable in our hot summers. This patio has lots of cool shade provided by aspens and other trees, vines climing the walls and a cooling water feature that splashes down the stone wall, crisscrosses the patio and spills into a small reflecting pool. Plants are grouped according to the sun and water requirements, making watering and maintenance easier.

Entry Garden Paving by Native Design, Helena, Montana
An alternative to lawn grass: these pavers are spaced a few inches apart with grass planted between them. This allows rainwater to permeate as well as gives visual interest and breaks up the expanse of hard material.

Contemporary hillside home with native grasses, by Native Design, Montana
A native grass meadow was planted on this slope after construction of the home had disturbed the soils. The designer used all xeriscape techniques and mostly native plants to connect this contemporary home to it’s natural surroundings in the hills south of Helena.

Boulder terraces and native waterwise plantings by Native Design, Montana
An alternative to the big front lawn: a native grass meadow with boulder terracing punctuated with drought-tolerant mostly-native shrubs, trees and perennials.

Waterwise entry garden reduces the amount of lawn with drip irrigated beds, Native Design, Montana
To reduce the amount of bluegrass lawn in this front yard, the owners of this Helena Valley home put in large, bermed plant beds with many native plants such as aspen, potentilla, juniper, dwarf pine and artemisia. The soil was improved before planting and under the river rock mulch is a low-volume drip irrigation system

Entry garden with native waterwise plant beds, Native Design, Montana
To reduce the amount of bluegrass lawn in this front yard, the owners of this Reeders Village home installed several large, mulched plant beds with drought-tolerant plants such as amur maple, flowering crab, potentilla, blue fescue, blue oat grass, rocky mountain juniper, dwarf spruce, snow in summer and artemisia. The soil was improved before planting and under the mulch is a low-volume drip irrigation system.

Gravel path meanders through entry garden, Native Design, Montana
This Lakeside home replaced half of it’s thirsty bluegrass front lawn with a meandering gravel path, stone steps and a perennial garden under the mature trees. This is how visitors approach the front entry: much more welcoming than it was before these changes.

Slate terraces and plant beds by Native Design, Helena Montana
One principle of Xeriscaping is to group plants into zones according to their growing requirements, especially water requirements. Here, an isolated bed of shade-loving plants separates a lower patio from the upper one. Hosta, Maiden Pinks, Lady Fern and Coralbells thrive in the same bed.

To be continued … check back for more photos, more details and more inspiration!

Looking to nature for inspiration

Study for Lovejoy Fountain by Lawrence Halprin
Study for Lovejoy Fountain by Lawrence Halprin
HalprinWaterFeature1
Lovejoy Fountain in Portland, Oregon design by Lawrence Halprin

 

 

 

 

 

 

 

 

Note: this is a 2005 post I have resurrected.  I tried to update links, but if you find a broken link please let me know. Thank you!

A discussion on Garden Web about water feature trends got me thinking what exactly is it that makes a well designed water feature?

I first learned of Lawrence Halprin in landscape architecture school a very long time ago … I was impressed by the 100’s of sketchbooks he had filled over the years. Of particular interest to me were his sketch studies of waterfalls, creeks, plunge pools, eddies and other water shapes in mountain creeks and rivers … he spent countless hours studying the way water acts naturally so he could design the urban concrete fountains for which he is known. And his sketchbooks inspired me to do some of my own studies as I backpacked around the Washington Cascades, Olympic Mountains and places in Montana.  

Ira Keller Fountain by HalprinSome of my favorite Halprin fountains are Lovejoy Plaza and the Ira Keller Fountain in Portland, Oregon along with Freeway Park in Seattle. In Washington DC, the FDR Memorial waterfalls are well used. You pretty much have to have studied the natural flow of water to make convincing monumental artificial falls like these, also at the FDR Memorial.

Halprin is by no means the only architect/landscape architect or designer noted for beautiful, appropriate and celebrated water features. But he is one who influenced me, influenced the way I design and the way I look to nature for guidance, for ideas, for inspiration.

Water Features in the Garden: How to Visually Connect Them

dry stream and sculpture in garden

dry stream and sculpture in garden
Garden features such as urns, ponds and small flowing streams can add to your enjoyment of the garden as well as connect the different parts of your garden together.

Here is an example of an outdoor room with two water features. The water features — a flowing urn and a pond — are separated by a distance of about 25 feet in this garden. We needed a design solution to visually connect them.  The garden’s pond is located next to a low deck and appears to extend under the deck. The second water feature is an overflowing urn fountain on the other side of the small garden (in the photo above, look for the blue urn, barely visible behind the ornamental grasses.) The water flows over the rim of the urn and disappears into a hidden reservoir under the container. We wanted to visually and psychologically connect the urn fountain with the small garden pond as well as solve a drainage problem. 

Our solution was to build a dry stream bed using the same stones we used in the pond and around the urn. The dry stream gives an illusion of flowing water and in the imagination and mind of garden visitors, the urn is a perpetually flowing source of clear fresh water for the pond.

In order to fool the eye and create as natural-looking a stream bed as possible, I took my inspiration from the way bedrock, boulders and cobbles come to rest in a mountain stream. Too many times when folks attempt to create a dry stream bed in their landscaping it results in something that looks very unnatural — or worse. The tendency people have is to dig a swale or channel; line the edges with large rocks and fill the center with smaller river rock. That isn’t the way river dynamics form streams in nature.

howtobuildadrystreambed

In the center of the above montage, you can see the rough sketch I made before we started construction. It’s almost impossible to design the exact layout of water features, when working with boulders and other natural materials.  Fortunately I was able to stay involved in the construction process to make sure the final results matched what was in my head. I also owe much of the credit to the contractor who installed the water feature — he was sensitive to the same forces of nature I observe, and we worked well together.

If you want to design water features in a “natural” style, consider water’s natural behavior — particularly the way water affects the environment through which it flows. Take a hike in the mountains and observe the way gravel and cobbles fill the nooks and crannies between boulders lin a tumbling mountain stream. Gravel is lighter than boulders, so it is picked up and carried by water more readily than the larger stones. Spring runoff and high flows are strong enough to move boulders so these are shifted until they get stuck in a tumbly looking pattern. If you live in a valley — there may be natural water features you can imitate.  A stream or river can give you design clues in the shape of the meanders, the oxbows, the inner and outer curves and how the banks are sculpted by the flow.  Where are the large rocks, if any?  Where is the gravel deposited and is it all the same size?

What other garden features might benefit from an observation of nature in the design process?  Ponds, boulder benches, stepping stones and other pathways, terraces, stone walls, even steps leading from one garden level to another. These will be topics in at least one future post so check back for more design inspiration.

Links that might help with designing garden features in a “Nature Inspired” style:

Garden Buddha in Dry Stream Garden

Here are some more photos from this garden installation and it’s first year. There are several nature-inspired garden features in this small private landscape project including dry-laid stone walls, shade structures, a wandering stepping stone pathway, boulder benches and a total absence of lawn. Click on any of the photos to see a larger version. Enjoy! And please comment if you have any questions about your own water feature. Thank you for reading!