This document provides information on xeriscaping and selecting drought-tolerant plants for landscapes in North Dakota. It begins with an introduction to xeriscaping and why it is important given North Dakota's climate. It then provides a list of grass, tree, shrub, perennial, and annual plant options that are suitable for low-water landscapes. The document emphasizes proper planning, plant selection, and maintenance techniques like mulching to establish xeric plants and conserve water. It also discusses zoning plantings by water needs and allowing plants to naturally acclimate to local conditions.
Plant cards with information about native and drought-tolerant plants appropriate for southwestern landscapes. Plant cards include images, facts, and growing tips.
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Plant cards with information about native and drought-tolerant plants appropriate for southwestern landscapes. Plant cards include images, facts, and growing tips.
Why? Because each April people across the globe celebrate World Landscape Architecture Month. To keep you thinking about nature, gardens, and southwestern plants year-round (not just when you take your Flonase), D/P/S's landscape architects and designers have created plant cards with information about some of their favorite native and drought-tolerant plants.
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Xeriscape Plant Selections and Ideas - North Dakota State University
1. H-957 (Revised)
X eriscape Plant Selections
and Ideas
Ronald C. Smith Rose Larson
Horticulturist Landscape Architect
“Xeriscaping” is a term North Dakotans should become The purpose of this publication is to provide a list of
more familiar with. A xeriscape is a landscape which uses some plant materials which the North Dakota property
plants that have low water requirements, making them owner may wish to consider to move toward more xeric,
able to withstand extended periods of drought. Xeric or less water demanding, landscape plants.
landscapes are a conscious attempt to develop plantings
which are compatible with the environment.
Foundation plantings of shrubs and trees located
Grasses
randomly in the lawn and expanses of green, lush turf, all Agropyron cristatum (Crested wheatgrass). Used as
requiring vast amounts of water to be sustained, are not a turfgrass, mowed at 3"; select cultivars ‘Fairway’,
compatible with dry seasons in North Dakota. Plantings ‘Ruff’, and ‘Ephrium’. Sow at 5 pounds/1000 square feet.
of this type originated in the eastern United States where A cool season grass requiring supplemental water
rainfall averages 30 inches or more per year, with a fairly during extended drought or heat periods to maintain color.
regular distribution pattern over the growing season. This
Andropogon gerardii (Big bluestem). Native to the
usually allows plants to survive and, in most cases, thrive.
tallgrass prairie region of the central U.S. It grows
Xeric landscaping will require a change in styles as 6 to 7 feet at maturity, and spreads by rhizomes.
well as plant materials. Going “native” in plant selections An attractive plant for background gardens, prairie
is often thought to be synonymous with “drought restoration, or simply for ornamental appreciation.
resistant.” Native plant establishment is often one of
Bouteloua curtipendula (Sideoats grama). Used as an
opportunity or timing; when the seeds make contact
ornamental ground cover, 12 to 24 inches tall. Makes an
with the soil, whether adequate moisture is available,
attractive “meadow” with attractive flower (orange-red)
what the competition is, and whether there are herbivores.
and seed show along stem. Slowly invasive.
With these factors to consider, xeric landscaping should
not be undertaken without proper planning, plant Bouteloua gracilis (Blue grama). Used as a turf or clump
selection, and placement. For design ideas and principles, ornamental grass. Mow to 3 inches, otherwise, height
refer to NDSU Extension Service publication H-958, ranges from 6 to 24 inches. Sow 2 to 3 pounds/1000
“Landscape Ideas for North Dakota Homeowners.” square feet, and at least 8 weeks before the first frost
date. Often a companion of buffalograss turf.
Buchloe dactyloides (Buffalograss). Used as a turf,
mow at 3 inches, or unmowed at about 4.5 inches.
Difficult to establish from seed. Plug planting more
effective, 12 to 18 inches apart, and interseeded
with blue grama to form sod in one growing season.
Greens up after last spring frost, and goes dormant
after first fall frost.
North Dakota State University
Fargo, North Dakota 58105
Reviewed and reprinted April 2003
APRIL 1997
3. Calamagrostis acutiflora ‘Karl Foerster’(Karl Foerster Drought tolerance is not simply a function of genetic
Feather Reed Grass). Grown as an ornamental bunch capability. Many of these species, if watered frequently,
grass, getting 3 to 5 feet in height, forming a dense clump. will not prove to be drought tolerant if water is suddenly
Attractive year round, with feathery inflorescence purple withheld. Plants previously subjected to water stress
in color, turning light tan in late summer, remaining suffer less from drought than plants not previously
into winter. stressed. Nurserymen realize this and “harden” their
transplants to
Festuca ovina glauca (Blue Fescue). Ornamental peren-
the field or landscape for better survival by decreasing the
nial clump grass, creating a series of mounds of blue-gray
frequency of watering and exposing the plants to full sun.
shapes that contrast nicely with just about any other color
in the garden. Flower is insignificant. Does not spread. If the homeowner cannot make a commitment to keep
water supplied to the plants throughout the growing
Miscanthus sinensis ‘Purpurascens’ (Red Flame
season, then early season water reductions should be
miscanthus). An attractive, clump forming grass that
practiced.
ranges from 3 to 4 feet in height. Bright green leaves
turn reddish in autumn, produces attractive bronze seed It should be noted that some of the plants are considered
heads. May need supplemental water during extended borderline tolerant. That is, some have successfully been
periods of drought. established in certain regions of the state without showing
enviromental injury. Check to see if a species you are
Phalaris arundinacea ‘Picta’ (Ribbongrass). An invasive
considering has been successfully grown in your area
grass that if contained to a limited area, will do the job of
before making a large investment.
covering the ground. Striped foliage attractive; tolerates
partial shade.
Note: Turf grasses like Kentucky blue and fine fescue The Importance of Mulching
may become more xeric with proper cultivar selection
(common types like ‘Park’, ‘Kenblue’, ‘Ram I’, and to Conserve Water
‘South Dakota Common’) and proper maintenance. There is a wide variety of products to use for mulching
This would include high mowing – at 3 inches – and purposes. The organic mulches include peat moss,
controlling of water application to no more than one inch manure, compost, leaf mold, and sawdust. They all have
per week (about 6800 gallons/10,000 square feet) when the advantages of saving or conserving moisture, slowly
there is no intermittent rainfall. providing nutrients, changing the chemistry of the soil,
changing the physical structure, and fairly low cost.
They need to be added on a regular (annual at least)
Wildflowers basis because of microbial breakdown.
Wildflower plantings have been trialed for years in Some inorganic mulches such as plastic sheeting, sand,
North Dakota, and have been found to be a xeric, nearly vermiculite and perlite add no nutrients, are subject to
care free alternative to bedding plants, where a less movement by the wind and moving water, and are
formal and more natural appearance is desired. A regional generally unaffected by microbial action.
mix will provide color from April through to fall frost.
Generally, the mulches work best on vegetable and flower
Many seed companies have regionalized wildflower mixes plantings, shrub beds and some trees, but could actually
that are laced with annuals to provide color the first year be detrimental to native plantings. Mulches should not
of planting, with some re-seeding each year until the be placed against the trunks of trees, but set back a few
perennials become aggressive and limit their space for inches to keep rodents from feeding on the bark during
growing. It is not within the scope of this publication to the winter.
discuss wildflowers extensively, but the xeric gardener
should be cautioned to not attempt establishment Remember that material that is too “fresh” – that is,
where rhizomatous grasses or weeds are dominant not weathered, will tie up nitrifying microorganisms during
(like quack-grass or Canada thistle!). Be sure of a the initial process and may cause nitrogen deficiency to
complete kill of these pests with Roundup or a similar the plants they are placed around. If a nitrogen deficiency
product before sowing any wildflower seed. occurs, the addition of some water soluble nitrogen
fertilizer to the mulch will correct the problem.
Once established after the first year, wildflower plantings
need only to be mowed once a year, in the late fall before
the snow flies, or in early spring before new growth
begins. The former is prefered.
4. Zonal Planting Concepts The “no water zone” (zone #3) could have some native
or adapted plant species that have acclimated to the
In the truly arid parts of the country, such as Arizona, usual preciptation patterns of the particular region.
eastern Colorado and west Texas, the Xeriscape Here, plants would need water for the first year
concepts are practiced via zoning around the house. (usually through a drip irrigation system) to become
With this concept, the high water requiring plants established, then allowed to go it entirely on their own.
are planted close to the house, often given the term
With the three zones clearly defined, it is obvious that
“oasis zone” (zone #1). The moderate, or regular
three entirely different classes of plant materials will
watering zone (zone #2), would contain plant materials
be needed. This takes careful thought in planning
that, after establishment, would require only occasional
and planting to avoid a hodgepodge design.
watering during extended droughty periods.
Key
1 – highest water use areas
2 – moderate water use areas
(three to four waterings
General Concept
per year)
3 – lowest water use areas
Concept
Derivatives
This publication may be copied for noncommercial, educational purposes in its entirety with no changes.
Requests to use any portion of the document (including text, graphics or photos) should be sent to permission@ndsuext.nodak.edu.
Include exactly what is requested for use and how it will be used.
For more information on this and other topics, see: www.ag.ndsu.edu
County Commissions, North Dakota State University and U.S. Department of Agriculture cooperating. Duane Hauck, Director, Fargo, North Dakota. Distributed in furtherance of
the Acts of Congress of May 8 and June 30, 1914. We offer our programs and facilities to all persons regardless of race, color, national origin, religion, gender, disability, age,
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request, (701) 231-7881.
H- 957 2M-4-03