How do you guarantee that it will rain? 1. Travel to Hawaii for - PowerPoint PPT Presentation

Henderson Experimental Gardens October 15, 2015

How do you guarantee that it will rain? 1. Travel to Hawaii for vacation 2. Host an outdoor picnic with family and friends 3. Wash your car 4. Wash and wax your car 5. Be a presenter at the Resilient Landscaping Workshop

What is currently happening in response to the drought? • How many have you heard of “turf rebate” (aka “cash for grass”) programs? • Who are promoting “turf replacement” programs? • Why are they doing this?

California Snowpack Photos

The Metropolitan Water District of California www.socalwatersmart.com

SoCal Water$mart: “Cash for Grass” 1. On May 26 th , MWD “Cash for Grass” = $340M funding 2. LADWP Residential turf removal customers A. $1.75 per square foot, up to a maximum of 1,500 square feet per property 3. LADWP Commercial turf removal customers A. $1.00 per sq. ft. = 10,000 sq. ft. B. > 10,000 sq. ft. = $0.50 per sq. ft. 4. LADWP has converted 23.5M sq. ft. since 2009

Photos courtesy of Los Angeles Department of Water and Power

Landscape Water Conservation Components • Irrigation • Mulching • Composting • Fertilization • Plant selection and design

What is the “opportunity” in times of adversity? • What is replacing the turf in these landscapes? WATER CONSERVING PLANTS • Landscape water conservation strategy – Improve irrigation efficiency – Match water supply to plant needs (maintain landscape health and appearance) • Where do I find a list of low water ornamental plants for my city? • How can I create my own local plant list?

Water Conservation Strategy = “hydrozone” Low water use plants Medium water use plants Turf = high Tree water use

“Simplified” Water Budget Equation for MWELO Maximum Applied Water Allowance (MAWA) = (ETo) (0.7) (LA) (0.62) ETo = Reference Evapotranspiration (inches per year) 0.7 = ET Adjustment Factor LA = Landscaped Area (square feet) 0.62 = Conversion factor (to gallons) Maximum Applied Water Allowance = _______ gallons/year Landscape Water Requirement (LWR) = ((Eto x PF) – Re) x (LA) x (0.62) / IE ETo = Reference ET data (inches) PF = Plant Factor Re = Effective rainfall (inches) LA = Landscaped Area (square feet) 0.62 = Conversion factor (to gallons) IE = Irrigation Efficiency (dependent on irrigation equipment) Landscape Water Requirement = _______ gallons/year To be in compliance with MWELO, LWR must be less than MAWA. If not, adjustments to the landscape design or irrigation scheduling is required.

WUCOLS IV

WUCOLS IV “Key” Points 1. A guide to plant water needs and is not a method for estimating landscape water needs. 2. Plant water use assignments were made by consensus agreement of leading horticultural professionals representing 6 different climatic regions in California. 3. If a committee did not know a plant, it was not evaluated. If the plant was not appropriate for a region, it was so noted. 4. Reviewed and updated to 3,546 taxa. Less than 5% of species have been evaluated through field research and have been included

WUCOLS IV Key Points (cont.) 5. The plant factor for MWELO water budget calculation shall be from WUCOLS. 6. Based on Qualitative Research - Consists of in-depth interviews using focus group discussions that deal with subjective assessment of attitudes, opinions, and behavior. No statistics are generated, and it involves impressions rather than numbers. 7. Qualitative Research using “horticultural experience & wisdom” serves as a “bridge” to meet a critical need by the industry until Quantitative Research is conducted

Quantitative Research - Water Use Field Study Projections • Assumptions – 3,546 plant taxa listed (WUCOLS) minus 170 plant taxa (north and south) = 3,376 plant taxa requiring research – For N. Calif. study, current research capacity = 30 species researched per 2 years on 1 acre Therefore, it would take 112.5 acres and 2 years to complete the • balance of the WUCOLS plant list (N. Calif. only) • Or, it would take 225 years to complete WUCOLS list at 30 plants every 2 years

CCUH Role in the WUCOLS Update Process • Gain DWR & horticultural industry support • Hire former WUCOLS authors as consultants, Larry Costello and Katherine Jones • Six regional meeting process began late 2012 and ended one year later • WUCOLS IV plant database live in 2014

Qualitative Research Process – Focus Groups • Are a data collection method • Data collected through a semi-structured group interview process • Moderated by a group leader • Used to collect data on a specific topic

WUCOLS IV Regions Central Valley North Central Members Affiliation Members Affiliation Barrie Coate Coate and Associates Lance Walheim L. Walheim Assoc. Nelda Matheny HortScience Ellen Zagory UCD Arboretum Don Mahoney Strybing Arboretum Karrie Reid UCCE Dick Turner Pacific Horticulture Cheryl Buckwalter Landscape Liasons Nevin Smith Suncrest Nursery Taylor Lewis Cornflower Farms Lori Palmquist Irrigation and Design Consultation Missy Gable CCUH James MacNair MacNair & Assoc. South Inland Members Affiliation Bob Perry B. Perry Assoc. Bart O'Brien Rancho Santa Ana BG Ken Kammeyer KK Associates Pam Pavela Western Municipal Water District Ron Kammeyer KK Associates Marilee Kuhlman Comfort Zones Garden Design Dave Giddens Giddens Irrig. Design

WUCOLS IV Regions South Coastal South Coastal (San Diego) Members Affiliation Members Affiliation Randy Baldwin San Marcos Growers Paul Redeker Cuyamaca College Carol Bornstein LA Nat'l History Museum Megan Allison Mira Costa College Kathy Musial Huntington BG Nan Sterman Garden Writer Don Hodel UC Cooperative Ext. Dave Ehrlinger San Diego BG Mike Evans Tree of Life Nursery Jim Bishop SD Hort Soc. Kathy Copley Lightfoot Planning Planning Group David Reed ASLA High/Low Desert Members Affiliation Spencer Knight Palm Desert Diane Hollinger Palm Desert Randy Meyers RG Meyers & Nurseries Ray Lopez Ray Lopez and Associates Jeff Place College of the Desert Hudson Hale Horttech Landscape Construction Bob Perry B. Perry Associates

Selection Criteria • Professional diversity (disciplines including nursery professionals, landscape contractors, landscape architects, botanical garden/arboreta staff members, consultants, and academics) • “Must have” is that we select only the very best "plants people" --- this is crucial to the success of this work • Availability to meet in person (flexible) • Team size = 6 – 9 reviewers

WUCOLS IV Sample Work Sheet Additions TYPE Botanical Name Common Name 1 2 3 4 5 6 X B Albuca juncifolia rush leaved albuca X B Albuca nelsonii natal albuca WUCOLS list divided into plant X B Albuca shawii B Alstroemeria spp. Peruvian lily M M M M ? M categories: X B Amarcrinum memoria-corsii crinodonna X B Amarygia hybrids amarygia B Amaryllis belladona naked lady VL VL VL L L L Bamboo poppy-flowered X B Anemone coronaria anemone VL Bulb B Arthropodium cirrhatum star lily M ? M ? / / Grass X B Babiana spp. Groundcover B Babiana stricta hybrids baboon flower L L L ? / / Perennial X B Baeometra uniflora beetle lily X B Bloomeraia crocea golden stars Palm and Cycad X B Boophone disticha oxbane Shrub Bravoa geminiflora (See B Polyanthes geminiflora) Succulent B Bulbinella robusta bulbinella L ? ? L ? ? Tree X B Calochortus spp. Mariposa lily Vine B Calostemma purpureum garland lily M ? ? ? ? ? California native X B Camassia cusickii Cusick's Quamash X B Camassia quamash camas B Canna spp. canna M M M H M M X B Chlorogalum pomeridianum soap plant X B Clintonia andrewiana red clintonia B Colchicum agrippium autumn crocus VL VL M M M M B Crinum spp. crinum lily, spider lily M M M M M ?

Searchable Database Requirements 1. WUCOLS IV designated website ( http://ucanr.edu/sites/WUCOLS) 2. Print entire plant list (all regions) 3. Search by region by selected city 4. Search: a. Botanical name b. Common name c. Plant Type d. Water Use 5. Create “your own” list 6. Save to an Excel file

Example of low water use plant list for Fresno

Searchable Database Requirements 1. WUCOLS IV designated website ( http://ucanr.edu/sites/WUCOLS) 2. Print entire plant list (all regions) 3. Search by region by selected city 4. Search: a. Botanical name b. Common name c. Plant Type d. Water Use 5. Create “your own” list of “low” water use plants for Fresno 6. Save to an Excel file

WUCOLS IV Sponsors • Regional Water Authority (Northern California) • American Society of Landscape Architects (CCASLA) • Association of Professional Landscape Designers (APLD) American Society of Irrigation Consultants (ASIC; north and south) • • Cagwin & Dorward (N. Calif. landscape construction & maintenance) • California Association of Nurseries and Garden Centers (CANGC) • California Landscape Contractors Association (CLCA State) • California Landscape Contractors Association (San Diego Chapter) San Diego County Water Authority • • Water Forum • Glenn Schmidt Landscaping, Inc. • Department of Water Resources, Water Use Efficiency