The document provides information about xeriscaping and selecting low water use plants. It includes definitions of key terms like xeriscape, turf, irrigation, soil amendments, and mulch. It also lists the principles of xeriscape - good planning and design, efficient irrigation, soil amendments, mulches, low water plants, and maintenance. The document contains information about estimated water needs for native trees, fruit trees, and high water trees in Tucson and Phoenix for each month. It includes sample responses to an assessment asking to analyze and recommend trees for a parking lot based on water needs and costs. The response includes charts comparing water needs and costs for mulberry, orange, and mesquite trees over 1-4
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Xeriscape Program: Arizona Geographic Alliance
1. Handout #1
Xeriscape Program
The term Xeriscape is derived from the Greek word xeros, which means dry. Some people who are
unfamiliar with the term confuse the "xeri" with "zero" and as a result, think Xeriscapes have no plants and
require no water. Xeriscapes do have plants and they do require water, but they require much less than a
traditional grass yard. Since we live in a desert, less water intensive, adaptable landscaping is a desirable
choice.
Principles of Xeriscape
Good Landscape Planning and Design
Appropriate Turf Areas
Efficient Irrigation
Use of Proper Soil Amendments
Use of Mulches
Low Water Use Plants
Appropriate Maintenance
Glossary:
Landscape: to modify or ornament (a natural landscape) by altering the plant cover
Turf: the upper stratum of soil bound by grass and plant roots into a thick mat
Irrigation: to supply (as land) with water by artificial means
Soil Amendments: nutrients added to the soil to feed plants
Mulch: a protective covering (as of sawdust, compost, or paper) spread or left on the ground to reduce
evaporation, maintain even soil temperature, prevent erosion, control weeds, enrich the soil, or keep fruit
(as strawberries) clean
Taken from the following page of the Arizona Municipal Water Users Association’s web site:
http://www.amwua.org/conservation-xeriscape.htm
2. Handout #2
Estimated Water Requirements for Tucson
(For plants with a 10 foot canopy diameter using a drip irrigation system)
High Water
Native Trees* Fruit Trees
Month of Year Trees**
(Gallons per day) (Gallons per day)
(Gallons per day)
January 1.3 2.9 3.1
February 1.9 4.1 4.4
March 2.8 6.1 6.5
April 3.9 8.5 9.1
May 4.6 10.1 10.8
June 5.2 11.3 12.2
July 4.5 9.6 10.4
August 3.8 8.3 8.9
September 3.6 7.7 8.3
October 2.8 6.1 6.5
November 1.8 3.8 4.1
December 1.2 2.6 2.8
* Examples of native trees include Palo Verde, Sweet Acacia, and Mesquite.
** Examples of high water trees include Cottonwood, Ash, and Mulberry.
Data obtained from Guidelines for Drip Irrigation Systems prepared by the Arizona Landscape Irrigation Guidelines
Committee, July 2001 www.amwua.org
3. Handout #3
Estimated Water Requirements for Phoenix
(For plants with a 10 foot canopy diameter using a drip irrigation system)
High Water
Native Trees* Fruit Trees
Month of Year Trees**
(Gallons per day) (Gallons per day)
(Gallons per day)
January 1.2 2.5 2.7
February 1.8 3.8 4.1
March 2.6 5.7 6.2
April 3.8 8.3 8.9
May 4.6 9.9 10.6
June 5.1 11.1 12.0
July 4.8 10.5 11.3
August 4.3 9.2 9.9
September 3.7 8.0 8.6
October 2.6 5.7 6.2
November 1.6 3.5 3.8
December 1.0 2.2 2.4
* Examples of native trees include Palo Verde, Sweet Acacia, and Mesquite.
** Examples of high water trees include Cottonwood, Ash, and Mulberry.
Data obtained from Guidelines for Drip Irrigation Systems prepared by the Arizona Landscape Irrigation Guidelines
Committee, July 2001 www.amwua.org
4. Handout #4
Student Name _____________________
Date _____________________
Water Use T-Charts
Month of Use _______________________
Native Trees Fruit Trees High Water Trees
Number of Amount of Number of Amount of Number of Amount of
Days water Days water Days water
Watering (in gallons) Watering (in gallons) Watering (in gallons)
1 1 1
2 2 2
3 3 3
4 4 4
5 5 5
6 6 6
7 7 7
8 8 8
9 9 9
10 10 10
20 20 20
30 30 30
n n n
5. January Water Use T-Chart:
Answer Sheet for Tucson
Native Trees Fruit Trees High Water Trees
Number of Amount of Number of Amount of Number of Amount of
Watering water Watering water Watering water
Days (in gallons) Days (in gallons) Days (in gallons)
1 1.3 1 2.9 1 3.1
2 2.6 2 5.8 2 6.2
3 3.9 3 8.7 3 9.3
4 5.2 4 11.6 4 12.4
5 6.5 5 14.5 5 15.5
6 7.8 6 17.4 6 18.6
7 9.1 7 20.3 7 21.7
8 10.4 8 23.2 8 24.8
9 11.7 9 26.1 9 27.9
10 13 10 29 10 31
20 26 20 58 20 62
30 39 30 87 30 93
n 1.3n n 2.9n n 3.1n
6. January Water Use T-Chart
Answer Sheet for Phoenix
Native Trees Fruit Trees High Water Trees
Number of Amount of Number of Amount of Number of Amount of
Days water Days water Days water
Watering (in gallons) Watering (in gallons) Watering (in gallons)
1 1.2 1 2.5 1 2.7
2 2.4 2 5.0 2 5.4
3 3.6 3 7.5 3 8.1
4 4.8 4 10.0 4 10.8
5 6.0 5 12.5 5 13.5
6 7.2 6 15 6 16.2
7 8.4 7 17.5 7 18.9
8 9.6 8 20 8 21.6
9 10.8 9 22.5 9 24.3
10 12 10 25 10 27
20 24 20 50 20 54
30 36 30 75 30 81
n 1.2n n 2.5n n 2.7 n
7. Handout #5
Assessment: Trees for the Parking Lot
A large discount department store named StuffMart is planning to build a new store and parking lot in
your town. They would like to plant 50 trees around the parking lot and have hired you as a water and
landscaping consultant. They haven’t decided what kinds of trees to plant around the parking lot. The
manager is from New York, and she thinks mulberry trees would be nice. The assistant manager
suggested planting orange trees. He thinks the customers would like to pick a few oranges to take home
with them after shopping. One of the cashiers, who grew up in Arizona, suggests planting mesquite trees
because people in Arizona are so accustomed to seeing them everywhere.
They are all concerned about the cost of watering the trees, particularly in peak watering months of the
summer. There is a rumor that water rates will soon be going up to $0.05 a gallon. Your job is to provide
information about the amount of water necessary and the cost of watering for each of the three different
types of trees. The manager would like a chart that shows the watering amounts and costs for one, two,
three, and four weeks in June for each tree. She would also like formulas that she can use to calculate the
amount of water and the cost for watering any number of days in June. Finally, she would like you to
write a letter to the staff of StuffMart summarizing your analysis of the watering costs, and stating which
type of tree you would recommend planting in the StuffMart parking lot.
8. Handout #6
Rubric for Scoring Trees for the Parking Lot
T-Chart
CATEGORY 4 3 2 1
Data Table Data in table is well Data in table is Data is the table is Data in table is
organized, fairly organized, somewhat accurate not accurate
completely accurate, accurate, and easy and easy to read. and/or cannot be
and easy to read. to read. read.
Neatness and Exceptionally well Neat and relatively Lines are neatly Appears messy
Attractiveness designed, neat, and attractive. A ruler drawn but the and “thrown
attractive. A ruler and graph paper graph appears together” in a
and graph paper are are used to make quite plain. hurry. Lines are
used. the graph more visibly crooked.
readable.
Units All units are Most units are Some units are Units are not
described (in a key or described (in a key described (in a key described.
with labels). or with labels). or with labels).
Letter
CATEGORY 4 3 2 1
Content The letter contains at The letter contains The letter contains The letter
Accuracy least 5 accurate facts 3-4 accurate facts 1-2 accurate facts contains little or
about water usage in about water usage about water usage no accurate facts
Arizona. in Arizona. in Arizona. about water
usage in
Arizona.
Ideas Ideas were expressed Ideas were Ideas were The letter
in a clear and expressed in a somewhat seemed to be a
organized fashion. pretty clear organized, but collection of
Recommendation is manner, but the were not very unrelated
easily understood. organization could clear. It took more sentences. It was
have been better. than one reading very difficult to
to figure out what figure out what
the letter was the writer was
recommending. recommending.
Grammar & Writer makes no Writer makes 1-2 Writer makes 3-4 Writer makes
spelling errors in grammar or errors in grammar errors in grammar more than 4
(conventions) spelling. and/or spelling. and/or spelling errors in
grammar and/or
spelling.
9. Sample Response:
Trees for the Parking Lot
June Calculations for Tucson
Mulberry Trees Orange Trees
Water Water
Cost per tree Cost per tree
(in (in
(in dollars) (in dollars)
gallons) gallons)
1 week 85.4 $4.27 1 week 79.1 $3.96
2 weeks 170.8 $8.54 2 weeks 158.2 $7.91
3 weeks 256.2 $12.81 3 weeks 237.3 $11.87
4 weeks 341.6 $17.08 4 weeks 316.4 $15.82
12.2 x $0.61 x 11.3 x $0.565 x
Formula number number of Formula number number of
of days days of days days
Mesquite Trees
Water
Cost per tree
(in
(in dollars)
gallons)
1 week 36.4 $1.82
2 weeks 72.8 $3.64
3 weeks 109.2 $5.46
4 weeks 145.6 $7.28
5.2 x $0.26 x
Formula number number of
of days days
To the Manager and Staff of StuffMart:
We definitely recommend that you plant mesquite trees in your parking lot. Mesquite trees are native to
Arizona, and will use much less water than the other trees and cost much less. The mulberry trees will
cost you $17.08 per tree during the month of June. If you multiply that times 50 trees, you will be
paying $854.00 for watering costs in June! Compare this to $7.28 per tree for mesquite trees. Even with
50 trees, you will only be paying $364.00 in June. This is less than half the cost of the mulberry trees.
We also think it is good for public relations that you advertise that you use xeriscape principles in your
parking lot design. People who shop at StuffMart can learn that using drought tolerant and native plants
can help cut down on water use in the desert.
Sincerely,
The Water Management Team
10. Sample Response:
Trees for the Parking Lot
June Calculations for Phoenix
Mulberry Trees Orange Trees
Water Water
Cost per tree Cost per tree
(in (in
(in dollars) (in dollars)
gallons) gallons)
1 week 84 $4.20 1 week 77.7 $3.89
2 weeks 168 $8.40 2 weeks 155.4 $7.77
3 weeks 252 $12.60 3 weeks 233.1 $11.66
4 weeks 336 $16.80 4 weeks 310.8 $15.54
12.0 x $0.60 x 11.1 x $0.555 x
Formula number number of Formula number number of
of days days of days days
Mesquite Trees
Water
Cost per tree
(in
(in dollars)
gallons)
1 week 35.7 $1.79
2 weeks 71.4 $3.57
3 weeks 107.1 $5.36
4 weeks 142.8 $7.14
5.1 x $0.255 x
Formula number number of
of days days
To the Manager and Staff of StuffMart:
We definitely recommend that you plant mesquite trees in your parking lot. Mesquite trees are native to
Arizona, and will use much less water than the other trees and cost much less. The mulberry trees will
cost you $16.80 per tree during the month of June. If you multiply that times 50 trees, you will be
paying $840.00 for watering costs in June! Compare this to $7.14 per tree for mesquite trees. Even with
50 trees, you will only be paying $357.00 in June. This is less than half the cost of the mulberry trees.
We also think it is good for public relations that you advertise that you use xeriscape principles in your
parking lot design. People who shop at StuffMart can learn that using drought tolerant and native plants
can help cut down on water use in the desert.
Sincerely,
The Water Management Team