SUMMER 1 992 / Center for Urban Horticulture / Washington Park Arboretum / College of Forest Resources / University of Washington / Vol. 9, No. 3 ~X. The Center for Urban Horticulture is committed to excellence in research, teaching and public service in urban horticulture. CENTER NEWS ULTIMATE PLANT CLINIC Two major universities in the state, Washington State University and the ^University of Washington, have joined ogether to operate the Washington Gar- den Clinic. This walk-in clinic is being held each Monday evening, 4 to 8 p.m., at the Center for Urban Horticulture. This clinic is modeled after the highly successful Garden Clinics conducted by the King County Master Gardeners, but with additional services available. Clin- ics feature home gardening advice, plant pest and disease diagnosis, garden plant identification and library study and re- search resources. For garden plant identi- fication, bring leaves and branches with fruit or flowers; on-the-spot identification is available. The clinics are conducted by: WSU/King County Master Gardeners, coordinated by Extension Agent George Pinyuh and Master Gardener Coordinator Mary Robson; University of Washington Otis Douglas Hyde Hortorium, coordinated by CUH Acting Director Clement Hamilton; Elisabeth C. Miller Library, co- ordinated by Librarians Valerie Easton and Laura Lipton. Each clinic will be staffed by at least one representative from each of these units. The Miller Library is now open each Monday evening so that clinic participants and other library users nay have after-work access to the large number of books, journals, catalogs and other resources available. These evening Library hours are being funded by a grant from the Northwest Horticultural Society. This cooperative effort expands the joint programming between WSU/King County Cooperative Extension and the UW Center for Urban Horticulture which began in 1983. Many Northwest garden- ers and professionals are familiar with the other cooperative WSU/UW programs such as ProHort Seminars & Newsletter, Master Gardener Lecture Series, Master Gardener Training, and the Master Gar- dener Plant Clinic on weekends at Wash- ington Park Arboretum. Additional coop- erative efforts are also being planned. ACADEMIC ADVISORY COMMITTEE A CUH Academic Advisory Committee has been appointed to advise the Dean of the College of Forest Resources, the Di- rector of CUH, and faculty and staff of the Center on matters pertaining to CUH academic programs in research, teaching and public service. This committee is currently reviewing long-range academic direction and goals as reflected in our mission statement, analyzing academic courses and cur- ricula, helping to define interdisciplinary projects and facility use, reviewing fac- ulty vacancies, and lending leadership to the academic field of urban horticulture and urban forestry. Members of this committee are: Rod Bailey, Evergreen Services Corporation; Shelley Farber, Washington State Depart- ment of Natural Resources; Rita Hummel, Washington State University- Puyallup; Karl Hutterer, Burke Museum; Jean Jacoby, Seattle University; Dorothy Raedeke, Raedeke & Associates. Also serving from the University of Washing- ton are: P. Dee Boersma, Institute for Environmental Studies; Marc Miller, Ma- rine Affairs; Sally Mussetter, English; Ri- chard Untermann, Landscape Architec- ture; Larry Bliss, Botany; Liz Van Volkenburgh, Botany; Richard Walker, Botany. TASK FORCES APPOINTED Two Task Forces have been appointed to assist with the gathering of ideas for de- velopment of the University of Washing- ton Arboreta. The Task Force for Plant Collections for Academic Programs will work to assemble ideas for the collec- tions themselves. The Task Force for Plant Collections for Public Service Pro- grams will gather ideas on how these collections could be used. Anyone inter- ested in sharing ideas or wanting more information should contact Tim Hohn or John Wott at the Center. HORT FIELD DAY The annual Hort Field Day was held ear- lier this spring (April 28) at CUH. Co- sponsored by the Washington Associa- tion of Landscape Professionals and CUH, this event brought together stu- dents from local vo-hort programs, land- scape contractors and Center staff. Stu- dents participated in nine different skill events such as line trimming and patio building, with events being judged by contractors. Schools participating in- cluded Enumclaw, Franklin Pierce (1st place team award), Kent Schools, Lynnwood, and Tahoma. UNDERGRADUATE CURRICULA As of this past spring our new under- graduate curricula had one student en- rolled, while several others are having their academic records reviewed for pos- sible participation. The Center has insti- tuted a recruitment program hoping to increase enrollment numbers for this fall. For more information, contact John Wott at 543—861 6. PUBLIC HORTICULTURE LECTURE SERIES Parking at CUH is in a University parking lot; individuals are responsible for their own $1.50 parking fees (note this rate increase — effective July 1). Ticket spitters accept quarters only. Parking at GVC/WPA is free. BROWN BAG GARDEN TALKS Informal lectures, walks on a variety of horticultural topics. First and third Wednesdays of each month, 12:10 to 12:50 p.m. FREE. Usually held in HUB, room 304, UW campus, unless other- wise noted. INSECT ID WALK July 1 Meet at Red Square Entrance to Suzzallo Library Is it sucking, chewing, or secreting? Dr. Robert Gara, UW Professor of Forest En- tomology, examines pest problems on campus trees. Learn to recognize symp- toms of insect activity, and work to identify potential tree pests. Bring those curious specimens from home for identification. TAXONOMY WALK July 15 Meet at the Red Square Entrance to Suzzallo Library Learn to identify plants the scientific way. Mark Rains reviews the basic terminol- ogy of plant parts and how to communi- cate correctly using plant names. Work together to recognize and classify cam- pus trees by family and genus (and species) based on the principles of taxonomy. NATIVE PLANT WALK August 5 Meet at the Red Square Entrance to Suzzallo Library Lower water use. Lower maintenance. Hardiness. Beauty. There are many justi- fications for using native plants in your home landscape. CUH students will lead this campus field study of a number of elegant native plants, and discuss their needs and uses. CONIFER ID WALK August 1 9 Meet at Red Square entrance to Suzzallo Library Conifer recognition can be confusing for home gardeners and professionals alike. Fortunately there are many taxonomic, tactile and other traits useful for identify- ing the genus and species of our many conifers. Jenks Farmer helps you learn to recognize characteristics of campus conifers. LASTING IMPRESSIONS September 1 6 HUB, Room 304 What do silica gel, microwave ovens, rafters and glycerine all have in com- mon? Each is related to a method of drying or preserving plants. Dave Stockdale shares techniques for drying, pressing and preserving herbs and flowers. All are easily done at home. Create your own lasting impressions! PLANTS AND GARDENS OF THE WORLD Unique combination of travelogue, plant examination, and people and plant cul- tural information. Meets at CUH. No pre- registration required; program fees in- clude refreshments. BLOOMS BELOW AND DOWN UNDER September 28 $5, payable at the door 7 to 9 p.m., CUH Part I: Landscape Plants of Australia Phillip Edwards, horticulturist with Rob- ert Shinbo and Associates, will relate ex- periences as a southern hemisphere nurs- eryman and highlight landscape selec- tions that are popular, exotic, or native to his down under hometown. Part II: A Bounty of Blooms from Bogota Colombia is the world's second largest exporter of cut flowers. Enjoy scenic views of countryside and production areas as Johna Beall and Rustin Aston of Beall's Roses trace the path of cut roses from greenhouse production near Bogota, to importation in Miami, through distribution to outlets in Seattle. _ x v f\ - v \ PLANT PALETTE Field lectures providing in-depth infor- mation on specific Arboretum plant col- lections. Leave from Graham Visitors Center in Washington Park Arboretum. No pre-registration required. BROAD-LEAFED EVERGREEN TREES July 18 $5, payable at the door 9 to 1 1 a.m., Graham Visitors Center Broad-leafed evergreen trees can provide an interesting foliage alternative to coni- fers. Arboretum Curator Tim Hohn leads this tour of these year-round winners — including many which are smaller in stature and perfect for the urban land- scape. Many of the plants viewed will be in flower or fruit. PLANT ENTHUSIAST Regional experts present in-depth lec- tures on specific plant groups. Programs held at CUH. No pre-registration required. THYME FOR GRAY HERBS July 8 $2, payable at the door 7:30 to 8:30 p.m., CUH Gray-foliaged herbs are often used to highlight other colors in the garden. Some also provide sweet and pungent fragrances, and many are drought toler- ant. Janice Peltier discusses the selection, placement, and culture of herbs such as wormwood, lavender and more. Sliaes and live specimens will help you dis- cover the subtle differences. MASTER GARDENER Practical gardening information for all, presented by WSU Master Gardeners. Programs held at CUH. No pre-registra- tion required. GARDEN CUT-UPS July 1 6 $2 (payable at the door) 7:30 to 8:30 p.m., CUH Creating new plants from cuttings can be easy using your basic knowledge of plant propagation. Learn successful tech- niques for taking and making cuttings of Northwest garden plants from a WSU Master Gardener. JUNE/JULY 1992 CALENDAR OF EVENTS Sunday Monday Tuesday Wednesday Thursday Friday Saturday 1 p.m. WPA 21 Sundays at One Tour CO 4-8 p.m. CUH 22 Washington Garden Clinic 23 8:30 a.m. CUH* 24 Jungle Tour 25 26 27 djb <35 1 p.m. WPA 28 Sundays at One Tour jju CO 4-8 p.m. CUH 29 Washington Garden Clinic 30 12:10 p.m., Red Square 1 Insect Walk 2 3 4 <&> <35 1 p.m. WPA 5 Sundays at One Tour W 4-8 p.m. CUH 6 Washington Garden Clinic 7 p.m. CUH* 7 Gardening with Native Plants 10 a.m. WPA 8 Explorers Walk 7:30 p.m. CUH* Thyme for Gray Herbs 9 10 8 a.m. CUH* 11 Vancouver Garden Tour Co 1p.m. WPA 12 Sundays at One Tour 03 4-8 p.m. CUH 13 Washington Garden Clinic 14 12:10 p.m. Red Square 15 Taxonomy Walk 7:30 p.m. CUH* 16 Garden Cut Ups 17 9 a.m. WPA* 1 8 Broad-leafed Evergreen T rees W5 1 p.m. WPA 19 Sundays at One Tour TO 4-8 p.m. CUH 20 Washington Garden Clinic 6:30 p.m. CUH* 21 Autumn Bounty 22 6:30 p.m. CUH* 23 Tufa Time 24 8:30 a.m. CUH* 25 Tacoma Garden Tour CO 1 p.m. WPA 26 Sundays at One Tour CO 4-8 p.m. CUH 27 Washington Garden Clinic 6:30 p.m. CUH 28 American Society of Landscape Architects 7 p.m. CUH Association of Women in Landscaping 29 30 8 a.m. CUH* 31 Mt. Rainier Tour AUGUST 1992 Sunday Monday Tuesday Wednesday Thursday Friday Saturday 10 a.m. WPA 1 Botanical Orienteering j-u CO Continuation of Mt. Rainier Tour 1 p.m. WPA 2 Sundays at One Tour ^ CO 4-8 p.m. CUH 3 Washington Garden Clihic 6:30 p.m. CUH* 4 Tree & Shrub Insects 12:10 p.m. Red Square 5 Native Plant Walk 6 7 8 djb <35 1 pan. WPA 9 Sundays at One Tour aju CO 4-8 p.m. CUH 10 Washington Garden Clinic 11 10 a.m. WPA 12 Explorers Walk 7 p.m. CUH Plant Amnesty 13 14 15 djb cro 1 p.m. WPA 16 Sundays at One Tour CO 4-8 p.m. CUH 17 Washington Garden Clinic 18 12:10 p.m. Red Square 19 Conifer ID Walk 6:30 p.m. CUH 20 Pleasure Preserved 21 22 djb 1 p.m. WPA 23 Sundays at One Tour a-u CO 4-8 p.m. CUH 24 Washington Garden Clinic 6:30 p.m. CUH 25 American Society of Landscape Architects 26 27 28 29 djb <35 1 p.m. WPA 30 Sundays at One Tour CO 4-8 p.m. CUH 31 Washington Garden Clinic — SEPTEMBER 1992 Sunday Monday Tuesday Wednesday Thursday Friday Saturday i 2 3 4 5 djb 1 p.m. WPA 6 Sundays at One Tour <3j 4-8 p.m. CUH Washington Garden Clinic 7 p.m. CUH 8 Puget Sound Mycological Society 10 a.m. WPA 9 Explorers Walk 7:40 p.m. CUH 10 Rock Garden Society 11 12 djb 1 p.m. WPA 1 3 Sundays at One Tour CO 4-8 p.m. CUH 14 Washington Garden Clinic 7:30 p.m. CUH Iris Society 7 p.m. CUH Orchid Society 15 12:10 p.m. HUB 16 Flower Preservation 7:30 p.m CUH* 17 Colorful Containers for All 18 19 djb 1 p.m. WPA 20 Sundays at One Tour CO 4-8 p.m. CUH 21 Washington Garden Clinic" 6:30 p.m. CUH 22 American Society of Landscape Architects 7 p.m. CUH Association for Women in Landscaping 23 24 10 a.m. CUH 25 NHS Plant Sale 10 a.m. CUH 26 NHS Plant Sale CO 1 p.m. WPA 27 Sundays at One Tour jru CO 4-8 p.m. CUH 28 Washington Garden Clinic 7 p.m. CUH Blooms Below and Down Under 7 p.m. CUH Puget Sound Bonsai Association 29 30 CUH = Center for Urban Horticulture WPA = Washington Park Arboretum HUB = Husky Union Building * = Fee Noon-4 p.m. WPA Master Gardener Clinic PLEASURES PRESERVED August 20 7:30 to 8:30 p.m., CUH $2 (payable at the door) Dried flowers and foliage from summer gardens can provide lasting pleasure throughout the winter months. Master Gardeners share plant preservation tech- niques, including selecting and pressing plant parts for making potpourri. Enjoy your garden year-round! COLORFUL CONTAINERS FOR FALL September 1 7 7:30 to 8:30 p.m., CUH $2 (payable at the door) Patio pots aren't just for summer annuals. Learn to choose plants and shrubs that will keep your container garden colorful throughout the fall and winter. Master Gardeners share ideas for planning and planting attractive, yet practical containers. ELISABETH C. MILLER LIBRARY NEWS The Library has received a generous gift of $10,000 from the Northwest Horticul- tural Society to fund extended hours and public outreach in 1 992. The library will now be open year-round on Monday eve- nings until 8 p.m. Besides providing con- venient evening hours for our many pub- lic users, these new hours enable the library to serve as an additional resource during the Monday evening Washington Garden Clinic. A new addition to the library reference shelves is The New Royal Horticultural Society Dictionary of Gardening. This magnificent, just-issued revision in four volumes is a gift from Constance McCord. Additional gifts were received in the spring from the Arboretum Foundation, the UW Botany Department Herbarium, and the estate of Ken Gambrill. We will also be purchasing new materials with a gift presented recently by the Greater Tacoma Community Foundation. This summer is a perfect time to use the library's resources on xeriscaping (water- conserving landscaping), irrigation, and drought-tolerant plant selections. Summer library hours are: 9 a.m. to 8 p.m Mondays; 9 a.m. to 5 p.m. Tuesday through Friday. URBAN HORTICULTURE COURSES You must PRE-REGISTER for all CUH classes and tours. Registrations are con- firmed upon receipt of payment; confir- mations include class location and sug- gested special equipment or materials needed. Be advised that classes often fill early. Parking at CUH ($1.50) is the re- sponsibility of the student; parking ticket spitters accept quarters only. Each class is offered only once, but may be conducted over several class periods on different days. Note DATES & TIMES listings for individual classes. URBAN/SUBURBAN JUNGLE TOUR Zoological horticulture is part science, part art, and part theater. Join us for some of each! First, tour Northwest Trek Wildlife Park near Eatonville — 435 acres of serene for- est, wetland and meadowland serving as home to native animals. Jim Barborinas, Trek's consultant landscape designer, discusses native plant selection and placement as we walk through this unique animal park. Afterwards, enjoy a tram ride through the rangeland habitat, and visit the butterfly atrium. Then enjoy a behind-the-scenes tour of Woodland Park Zoo's Tropical Rainforest BEFORE it officially opens. Sue Maloney, the zoo's Horticulturist, highlights the rare plants, planting and construction techniques, and unusual practices used to create this urban jungle. Afterwards, roam the zoo and leave whenever you're ready! Tour departs from and returns to Wood- land Park Zoo Parking lot. Fee does not include sack lunch or Zoo parking fee; does include entry fees. GUIDES: Jim Barborinas, Consultant For- ester, Urban Forestry Services; Sue Maloney, Horticulturist, Woodland Park Zoo DATE & TIME: June 24, 8 a.m. to 3:30 p.m. FEE: $40 REGISTRATION FORM Urban Horticulture Courses -\ COURSE FEE STUDENT NAME(S) TOTAL $ CHECK ENCLOSED FOR $_ Checks payable to University of Washington. No bank cards. Registrations filled in order received. Limited class enrollment; classes fill rapidly, so register early. Portion of fee may cover refreshments and speaker expenses. Refunds: Requests must be in writing or in person. Requests received 7 days or less from first class meeting have a $3.00 handling fee deducted. No refunds after the first class meeting. NAME Phone: Day_ _Evening_ ADDRESS Street City State ZIP Code Mail payment and registration to: Urban Horticulture Courses, GF-15 University of Washington Seattle, Washington 98195 A Gift of Learning: Give a gift certificate in the amount of one of the courses. Call 685-8033 for details. Telephones CUH— 685-8033 9 a.m. to 4:30 p.m, weekdays WPA— 543-8800 1 0 a.m. to 4 p.m., weekdays Noon to 4 p.m., weekends Coping With Drought: GARDENING WITH NATIVE PLANTS From our rich native Northwest flora come many attractive, outstanding plants indispensable to home gar- dens. Many native plants make appro- priate choices for lower water use landscapes — a current concern in the Northwest, and natives function well in lower maintenance gardens. Dr. Art Kruckeberg, author of Gardening with Native Plants of the Pacific Northwest: An Illustrated Guide, will share his experience and knowledge in selecting and growing native plants in this informative lecture. Come pre- pared with questions! INSTRUCTOR: Art Kruckeberg, Emeritus Professor of Botany, UW DATE & TIME: July 7, 7 to 9 p.m. FEE: $10, pre-registration required "GOOD LUCK CITY" GARDEN TOUR Vancouver is known as the "Good Luck City". It is also a city where gardeners take advantage of good weather and good views to create spectacular private retreats. Join us and visit three such gar- dens. First, visit a narrow city garden where foliage and perennials maximize beauty in minimal space. Next, view a hillside garden with dazzling coastal views. Finally, enjoy a "plant lover's paradise" of trees, shrubs and mixed bor- ders south of Vancouver. Tour size is limited; pre-register early. DATE & TIME: July 11,8 a.m. to 6 p.m. FEE: $45, does not include sack lunch AUTUMN BOUNTY Sure it seems a little early — but the truth is, to enjoy the incredible bounty of a fall vegetable garden — NOW is the time to begin. Learn how to plan, prepare, plant, manage and harvest the wide array of delicious vegetable crops easily grown during the fall and winter iri the Northwest. INSTRUCTOR: Holly Kennell, WSU Cooperative Extension DATES & TIMES: July 21, 6:30 to 9:30 p.m. FEE: $15 TUFA TIME! Learn to make your own simulated stone planter from a peat moss and cement recipe known as hypertufa. Students will construct a small container during class and gain the skills for making larger or more varied containers at home. Come ready to work — and join in the fun! INSTRUCTOR: Barbara Selemon, Propa- gator, CUH DATE & TIME: July 23, 6:30 to 9:30 p.m. FEE: $25, includes all materials TACOMA GARDEN TOUR Tacoma's treasures await— join us for this unique tour of two outstanding Tacoma gardens. Enjoy a private garden as interpreted for us by its designer while learning about the problem solving and creative processes involved in creating this garden. After enjoying a snack, continue on to a more widely known Tacoma treasure — Lakewold. Our guided tour of Lakewold will focus on the history and unusual plant materi- als of this well-designed garden. Tour size is limited; pre-register early. GUIDE: Dan Boroff, Dan Boroff Designs; Lakewold Guides DATE & TIME: July 25, 8:30 a.m. to 2 p.m. FEE: $28, includes transportation and snacks FREE FAMILY PROGRAM! "BOTANICAL" ORIENTEERING Orienteering is a sport and technique that involves, quite simply, learning to find your way through the woods. We have just the woods for you — our own Washington Park Arboretum. First, local experts will teach you the skillsof map readingand usingacom- pass. Then, put those skills to the test as we roam the Arboretum to find specific specimen plants based on our topographical maps. This is a fun fam- ily activity (for kids of all ages) — so see you there! COORDINATOR: DougSprugel, Pro- fessor of Forest Ecology, UW DATE & TIME: August 1 , 1 0 to 1 1 :30 a.m. LOCATION: Graham Visitors Center, WPA FEE: FREE Two-Day Tour! MT. RAINIER PLANT ECOLOGY TOUR The rugged beauty of Mt. Rainier has been shaped by mud flows, frost, ava- lanche, and erosion. This two-day field study explores the relationships between terrain and the plants and animals of The Mountain. On Friday, hike to Panorama Point to study the ecology of sub-alpine wild- flower meadows and the alpine zone. That evening we'll stay in cabins at the UW's Charles L. Pack Experimental For- est; be prepared for entertainment! Saturday features studies of plants on the drier side of the mountain. We'll drive to Sunrise and hike up to the unique alpine tundra on nearby Burroughs Mountain. Registration deadline is July 20; tour size limited GUIDE: Jeffrey Braatne, Postdoctoral Re- search Associate, UW DATE & TIME: July 31, 8 a.m. through August 1 , 6 p.m. FEE: $98; fee includes travel, lodging, all meals except first day's lunch MAJOR TREE AND SHRUB INSECTS Earns 3 hours WSDA Pesticide Recertification Credit Recognizing the early symptoms of in- sect infestation, the potential for damage, and understanding the lifecycles of com- mon pests will allow for effective man- agement. Learn to diagnose major tree and shrub insect problems and review integrated pest management techniques to reduce or eliminate them. Bring samples from home for identification and discussion. Class also qualifies for the Pest Manage- ment category of the Achievement Program. INSTRUCTOR: Gene Davidson, Consult- ant Entomologist, USAID DATE & TIME: August 4, 6:30 to 9:30 p.m. FEE: $19 WASHINGTON PARK ARBORETUM NEWS The Washington Park Arboretum is a liv- ing museum of woody plants for re- search, education, conservation, and display. Arboretum Tours & Activities: SUNDAYS AT ONE (1 p.m.), Arboretum guides lead tours every Sunday highlight- ing plants of seasonal interest. FREE. EXPLORERS' WALK, second Wednesday (NEW DAY!) of every month from 10 a.m. to Noon. Summer dates are: July 8, August 1 2 and September 9. FREE. SPECIAL TOURS for school classes, gar- den clubs and other interested groups can be arranged with three weeks' ad- vance notice by calling 543-8800. GRAHAM VISITORS CENTER (including the Arboretum Foundation Gift Shop) is open weekdays from 10 a.m. to 4 p.m., and from Noon to 4 p.m. on weekends, VOLUNTEERS are always welcome! If you are interested in volunteering at the Arboretum/Graham Visitors Center, call 543-8800 for information. The Washington State University MAS- TER GARDENERS will be at Graham Visitors Center every Saturday and Sun- day from Noon to 4 p.m. to answer your gardening questions. NORTHWEST HORTICULTURAL SOCIETY NEWS PLANT SALE TIME AGAIN! The 20th an- nual NFHS Plant Sale, "The Plant Lovers Plant Sale", will be held September 25, 1 0 a.m. to 5 p.m., and September 26, 1 0 a.m. to 3 p.m., at the Center for Urban Horticulture. There will be lectures, spe- cial events, and refreshments available — as well as the wide range of plants, bulbs, tools and books that local gardeners have come to anticipate. In preparation for this event, volunteers have been busily working within several sale departments — including trees, shrubs, perennials, bulbs, ferns, azaleas, rhododendrons, bonsai, dahlias, peo- nies, and herbs. Experts from each de- partment will be available at the sale to answer questions. Garden ornaments and a harvest of dried flowers and herbs will also be available for purchase. This is the area's last major sale of the season — so don't miss out! For more information about the sale or any other NHS activities, please call Jan at 527-1794. ARBORETUM FOUNDATION NEWS FALL BULB SALE. The AF Bulb Sale is scheduled for October 4-5 at the Gra- ham Visitors Center. A wide variety of interesting and unusual bulbs will be available — don't miss out! Call the Ar- boretum Foundation at 325-4510 for further information. SUCCESSFUL SALE. The Spring Plant Sale, held in May, was a great success. Many thanks go to the hundreds of volun- teers who put this show together — most especially, sale Chairperson Larry Mayhew. Continuing Education Staff John A. Wott, Associate Director, CUH Dave Stockdale, Coordinator, CUH Lynda ). Ransley, Coordinator, WPA Rebecca Johnson, Building Services Coordinator Jean Robins, Program Assistant Jenks Farmer, Graduate Assistant A ^ NV . NONPROFIT ORG. U.S. POSTAGE P A I D Seattle, Wash. PERMIT NO. 62 V University of Washington, GF-1 5 College of Forest Resources Center for Urban Horticulture Seattle, WA 98195 ./ r / A' \ \ S \ / SUMMER 1992