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Theh American A n GARDENERGARDENER® The Magazineg of the AAmerican Horticultural Societyy March / Aprilp 2015 5 designing an Inviting Garden Lovely Lilacs for Modern Gardens Add Wild Berries to Edible Landscapes “Nativars”: Should You Plant Them? contents Volume 94, Number 2 . March / April 2015 FEATURES DEPARTMENTS 5 NOTES FROM RIVER FARM 6 MEMBERS’ FORUM 8 NEWS FROM THE AHS AHS Environmental Award winners, keynote speakers for 2015 National Children & Youth Garden Symposium announced, President’s Council trip to Maine in June, Coalition of American Plant Societies to meet in Ohio in June. 12 AHS MEMBERS MAKING A DIFFERENCE Jane Milliman. 14 2015 GREAT AMERICAN GARDENERS AWARDS AND AHS BOOK AWARDS Meet this year’s winners. 42 HOMEGROWN HARVEST page 30 Potatoes: Underground treasures. 44 GARDEN SOLUTIONS Protecting plants from late frosts. 18 NATIVE BERRIES BY JESSIE KEITH If you enjoy foraging for America’s wild 46 TRAVELER’S GUIDE TO GARDENS berries, here are some that can be easily Wave Hill. integrated into your home landscape. 48 BOOK REVIEWS Encyclopedia of Garden Plants for Every 24 DESIGNING AN INVITING GARDEN Location, Epic Tomatoes, and Visions of BY CAROLYN SINGER Loveliness. Whether you have a new garden or Special focus: Regional gardening guides. are refreshing an existing one, these tips will help you create a landscape 51 GARDENER’S NOTEBOOK that inspires you and other visitors page 18 ‘Biokovo’ cranesbill is perennial plant of the to linger. year, researchers develop techniques to preserve native hemlocks, new wildfl ower species discovered, Michael Dirr honored by inventor 30 LILACS FOR MODERN GARDENS BY PATRICIA A. TAYLOR organization, Kris Jarantoski is Scott Medal Lilacs have fallen out of favor in the landscape for a variety and Award recipient for 2015, Sunset magazine of reasons, but there are many selections, new and old, worth sells California headquarters. growing in contemporary gardens. 54 GREEN GARAGE Natural fertilizers. 36 COMING TO TERMS WITH NATIVARS BY GRAHAM RICE Native plants are key to creating a wildlife-friendly garden, but 56 REGIONAL HAPPENINGS how well do cultivars of natives fi ll this role? 60 PRONUNCIATIONS AND HARDINESS AND HEAT ZONES 62 PLANT IN THE SPOTLIGHT ON THE COVER: Designed by Laura Crockett, Linda Ernst’s Portland, Oregon, landscape abounds Ohio spiderwort (Tradescantia ohiensis). TOP: COURTESY OF PROVEN WINNERS. BOTTOM: BILL JOHNSON with a colorful mixture of plants and garden accessories. Photograph by Josh McCullough March / April 2015 3 AMERICAN HORTICULTURAL SOCIETY 1,3/)2321+$-. Making America a Nation of Gardeners, a Land of Gardens ,1/+$&'/&1-'3,$+2/ Board of Directors CHAIR Amy Bolton Falls Church, Virginia FIRST VICE CHAIRMAN Jane Diamantis McDonald, Tennessee SECOND VICE CHAIRMAN Mary Pat Matheson Atlanta, Georgia SECRETARY Leslie Ariail Alexandria, Virginia TREASURER J. Landon Reeve, IV Woodbine, Maryland IMMEDIATE PAST CHAIR Harry A. Rissetto, Esq. Falls Church, Virginia EXECUTIVE COMMITTEE Henrietta Burke Alexandria, Virginia Marcia Zech Mercer Island, Washington Sandra Address Chevy Chase, Maryland Q Skipp Calvert Alexandria, Virginia Q Nancy Hargroves Manakin Sabot, Virginia Tom Johnson Washington, D.C. Q Louis B. Lynn Columbia, South Carolina Q Holly Shimizu Glen Echo, Maryland Ed Snodgrass Street, Maryland EXECUTIVE DIRECTOR Tom Underwood PRESIDENT EMERITUS Katy Moss Warner President’s Council The President’s Council is comprised of dedicated members whose annual support makes many of the Society’s programs possible, from youth gardening activities to horticultural awards programs. FOUNDER’S CIRCLE ($25,000+) Mr. and Mrs. George Diamantis Q Mr. and Mrs. Klaus Zech CHAIRMAN’S CIRCLE ($10,000–$24,999) Mrs. Leslie S. Ariail Q Mr. and Mrs. Bill Barnett Q Mrs. Kurt Bluemel Q Mrs. Elisabeth C. Dudley Q Mr. and Mrs. Thomas Farrell Q Mr. and Mrs. Harry A. Rissetto Q Ms. Katy Moss Warner LIBERTY HYDE BAILEY CIRCLE ($5,000–$9,999) Mr. and Mrs. Robert L. Bogle Q Mr. and Mrs. Albert Huddleston Q Mr. and Mrs. J. Landon Reeve, IV Q Mr. and Mrs. Tom Underwood Q Mr. and Mrs. W. Bruce Usrey HAUPT CIRCLE ($2,500–$4,999) Mrs. Sandra L. Address Q Mr. and Mrs. Nathan Bachman Q Ms. Amy Bolton and Mr. Philip Schoene Q Mr. (+$23,.3#'-..+.*!302//+.*3&#!3-.( and Mrs. Taylor Burke, III Q Ms. Petra Burke Q Mr. and Mrs. Skipp Calvert Q Mr. and Mrs. James R. Cargill Q Mr. and Mrs. Andy Daniel (20+*.+.*3 ,&13*-1(2. Q Mr. Joseph Errington and Mr. William Pullen Q Mr. and Mrs. Carl Estes Q Dr. Amy Goldman Fowler Q Mr. and Mrs. Joel Goldsmith Q #21/!32-1/)%1+2.(' 3/2$).+&203%,1 Ms. Christina Grady Q Dr. and Mrs. William O. Hargrove Q Mr. and Mrs. Herbert F. Hargroves Q Mr. and Mrs. Norman Hofley Q Mrs. 0&$$200%&'' 3*1,+.*3-.(3)-120/+.* Marta J. Lawrence Q Mrs. Shirley Ann Nicolai Q Dr. David D. Parrish Q Ms. Katherine Ward )21"0!3%1&+/0!3-.(32*2/-"'20 &**20/+,.03,.3/)23"20/3$1,#3 COUNCIL MEMBER’S CIRCLE ($1,000–$2,499) Ms. Pauline Adams Q Mr. and Mrs. David Asaibene Q Mr. and Mrs. Robert Baillie Q Mr. and -1+2/+203%,13(+%%212./312*+,.0 Mrs. Charles Barnes III Q Dr. and Mrs. William E. Barrick Q Mrs. Katherine McKay Belk Q Dr. and Mrs. Joseph Benedict Q Dr. and Mrs. 302-0,." 02-0,.3*&+(23%,1 Charles A. Binder Q Mrs. George P. Bissell, Jr. Q Dr. Sherran Blair Q Mrs. Elspeth G. Bobbs Q Mr. and Mrs. Michael T. Bradshaw Q Mr. "1+.*+.*3/)23%120)20/3%1&+/0!3)21"0!3 and Mrs. Allen W. Bush Q Mrs. Ellen Cabot and Mr. Matthew Watson Q Mr. and Mrs. Cason Calloway Jr. Q Ms. Mary Ann Carey Q Ray -.(32*2/-"'203%1,3*-1(2.3/,3#'-/2 Carlsen Q Mr. and Mrs. John E. Clark Q Mr. and Mrs. Timothy Conlon Q Rita Coslet Q Kay Davison Q Ms. Mary O. Dyer Q Ms. Katherine B. Edwards and Mr. John A. Ronveaux Q Ms. Julie Ernest Q Ms. Megan Evans and Mr. Howard M. Tucker Q Ms. Inger Fair Q Mrs. Walter S. Fletcher Q Dr. and Mrs. John A. Floyd, Jr. Q Mary Ann Franklin Q Elisabeth French Q Mr. and Mrs. A.M. Gellman Q Barbara Gorham Q Dr. and Mrs. Thomas B. Hall, III Q Clark Halstead Q Mr. and Mrs. Scott A. Harris Q Laura Hartman Q Rebecca Hartness Q Alice Hayes Q Ms. Catherine M. Hayes Q Mr. and Mrs. Paul A. Hess Q Ms. Nancy Hockstad Q Mr. Philip Huey Q Mr. and Mrs. Thomas Johnson Q Rose Johnston Q Mr. and Mrs. Charles Kittrell Q Mrs. Virginia Korteweg Q Mr. and Mrs. Gerald Kral Q Ms. Elaine Lee Q Mrs. Carolyn Marsh Lindsay Q Margo Loeffler Q Ms. JoAnn Luecke Q Dr. Louis B. Lynn Q Mr. and Mrs. R. Scott Lyons Q Mr. and Mrs. Bob J. MacLean Q Mr. and Mrs. Randolph Marshall Q Mrs. Dorothy W. Marston Q Kristi Martin Q Mr. and Mrs. James Masterson Q Mary McConnell Q Shirley Miller Q Mr. Egon Molbak Q Mr. and Mrs. Walter Montgomery Q Mr. and Mrs. Peter Morris Q Rose Morris Q Dr. and Mrs. David E. Morrison Q Mr. James R. Moxley, Jr. Q Mr. and Mrs. Robert Murray Q Mr. and Mrs. James T. Norman Q Marion Norwood Q Mr. and Mrs. Al Osman Q Ms. Julie Overbeck Q Johnnie Patricia Painter Q Melinda Papp Q Mr. and Mrs. Bill Paternotte Q Ms. Allison Porter Q Mrs. Lynn C. Rhomberg Q Ms. Rachael A. Rowland Q Dr. and Mrs. Dennis J. Rudzinski Q Mr. and Mrs. Mike Rushing Q Mr. Witney Schneidman Q Mr. and Mrs. William Schuiling Q Rose Schwartz Q Mr. and Mrs. Thomas Sedler Q Mr. R.P. Simmons Q Mr. and Mrs. Charles H. Smith Q Mr. Ed Snodgrass Q Mr. C. Hugh Stephens Q Dr. and Mrs. Steven M. Still Q Dr. Adrian Tiemann Q Mr. Joseph B. Tompkins, Jr. Q Mr. Joe Viar, Jr. and Ms. Bonnie Christ Q Mrs. Angela M. Vikesland Q Mr. and Mrs. Robert D. Volk Q Ann Wales Q Ms. Elizabeth M. Wehrle QMrs. Corinne Winburn Q Mrs. Dudley B. White Q Mr. and Mrs. Harvey C. White Q Mr. and Mrs. Donald Winship Q Dr. Dorothy Yang 3 and Mr. Ray Carlsen Q Mr. and Mrs. John Zoldak -.( 3$)-1/03/)-/3/2''3 ,&3)2.3/, 0,3022(03-.(3)-120/3(+%%212./3 HONORARY PRESIDENT’S COUNCIL (in memoriam) Ms. Louise Fruehling Q Mrs. Enid Haupt Q Mrs. John A. Lutz Q Mr. and Mrs. Bruce Miller 2*2/-"'20 Ms. Wilma L. Pickard 20,&1$23'+0/3-.(3*',00-1 ,123/)-.33$,',13#),/,*1-#)0 /)1,&*),&/3 Corporate Members Bonnie Plants Q The Care of Trees Q Chapel Valley Landscape Company Q Corona, Inc. Q The Espoma Company Q -#21"-$!3 3333#-*20 Monrovia Q Osmocote Q OXO Horticultural Partners America in Bloom Symposium & Awards Program Q Bellingrath Gardens and Home Q Colonial Williamsburg Foundation Garden Symposium Q Cox Arboretum MetroPark Q Friends of Fellows Riverside Gardens Q The Gardeners of America/ Men’s Garden Clubs of America Q The Homestead in the Garden Symposium Q Inniswood Garden Society Q Wegerzyn Gardens Foundation 4 the American Gardener The American NOTES CFROM RIVER FARM GARDENER EDITOR David J. Ellis MANAGING EDITOR AND ART DIRECTOR Mary Yee ASSOCIATE EDITOR Viveka Neveln PRING HAS different meanings to gardeners across the country. For some, it EDITORIAL INTERN represents a dramatic and welcome change of seasons. It is a time when the Mary S.