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Classic Hydrangeas Classic Hydrangeas TheThe AmericanAmerican GARDENERGARDENER® TheThe MagazineMagazine ofof thethe AAmericanmerican HorticulturalHorticultural SocietySociety May / June 2015 ClassicClassic HydrangeasHydrangeas Adding Zest with Irises Design Tips for Patio, Balcony, and Rooftop Gardens contents Volume 94, Number 3 . May / June 2015 FEATURES DEPARTMENTS 5 NOTES FROM RIVER FARM 6 MEMBERS’ FORUM 8 NEWS FROM THE AHS “Gardening on the Web” initiative update, explore Roman gardens with the AHS, Sunset Celebration, Horticulture in the Heartland, and save the date for gala at River Farm. 10 AHS NEWS SPECIAL National Children & Youth Garden Symposium goes to Lone Star State. 12 AHS MEMBERS MAKING A DIFFERENCE John Karel. 39 NATURAL CONNECTIONS The yucca and its moth. pagepage 1414 42 GARDEN SOLUTIONS Controlling pests with benefi cial insects. 44 TRAVELER’S GUIDE TO GARDENS 14 A KALEIDOSCOPE OF IRISES BY KELLY D. NORRIS Heritage Farm, Decorah, Iowa. Whether used in starring or supporting roles, irises add zest to a 46 HOMEGROWN HARVEST variety of garden styles and situations. Liven up summer gardens with okra. 20 MASTER OF WHIMSY 48 BOOK REVIEWS BY LINDA ASKEY Essential Perennials, Growing Beautiful Food, Tennessee horticulturist Jason Reeves and the New Southern Living Garden Book. is turning heads with imaginative Special focus: Pushing garden boundaries. and occasionally over-the-top art installations that have to be seen to 51 GARDENER’S NOTEBOOK be believed. Fungus causing thousand canker disease in black walnut trees eludes control efforts, report links popular herbicide with cancer, notable 26 CLASSIC HYDRANGEAS native trees for 2015, professional organization BY ANDREW BUNTING for landscapers gets new name, Landscape For many gardeners, mopheads Designer of the Year Award recipients and lacecaps are the quintessential announced, best dahlia variety selected by American Dahlia Society. hydrangeas. Get recommendations pagepage 2020 for the best selections among them 54 GREEN GARAGE from growers around the country. Raised beds. 32 FROM HARDSCAPE TO OASIS BY LYNN FELICI-GALLANT 56 REGIONAL HAPPENINGS With a little imagination and know-how, you can create lush 60 PRONUNCIATIONS AND HARDINESS gardens on places like patios, balconies, and rooftops. AND HEAT ZONES PLANT IN THE SPOTLIGHT ® 62 TOP: SUSAN A. ROTH. BOTTOM: LINDA ASKEY ON THE COVER: Twist-n-Shout is a reblooming lacecap hydrangea. Photograph by Bill Johnson Phlomis russeliana. May / June 2015 3 AMERICAN HORTICULTURAL SOCIETY Making America a Nation of Gardeners, a Land of Gardens 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. Harry A. Rissetto Q Mr. and Mrs. Klaus Zech CHAIRMAN’S CIRCLE ($10,000–$24,999) Mr. and Mrs. Bill Barnett Q Mrs. Kurt Bluemel Q Mrs. Elisabeth C. Dudley LIBERTY HYDE BAILEY CIRCLE ($5,000–$9,999) Mrs. Leslie S. Ariail Q Ms. Amy Bolton and Mr. Philip Schoene Q Mr. and Mrs. Skipp Calvert Q Mr. James R. Cargill Q Mr. and Mrs. J. Landon Reeve, IV Q Mr. and Mrs. W. Bruce Usrey Q Ms. Katy Moss Warner HAUPT CIRCLE ($2,500–$4,999) Mrs. Sandra L. Address Q Mr. and Mrs. Nathan Bachman Q Ms. Petra Burke-Ramirez Q Mr. and Mrs. Andy Daniel 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 Ms. Christina Grady and Mr. Thomas Gibian Q Dr. and Mrs. William O. Hargrove Q Mr. and Mrs. Thomas E. Johnson Q Dr. and Mrs. Louis B. Lynn Q Mrs. Shirley Ann Nicolai Q Dr. David D. Parrish Q Ms. Katherine Ward COUNCIL MEMBER’S CIRCLE ($1,000–$2,499) Mr. and Mrs. David Asaibene Q Mr. Dale L. Bachman Q Mr. and Mrs. Robert Baillie Q Mr. and Mrs. Charles Barnes III Q Dr. and Mrs. William E. Barrick Q Mr. and Mrs. Richard P. Beck Q Mrs. Katherine McKay Belk Q Mrs. George P. Bissell, Jr. Q Dr. Sherran Blair and Mr. Roger Blair, Esq. Q Mr. and Mrs. Michael T. Bradshaw Q Ms. Donna Brown Q Mr. Veggies And Herbs and Mrs. Taylor Burke, III Q Mr. and Mrs. Carson Calloway, Jr. Q Dr. and Mrs. Joseph P. Cameron Q Ms. Mary Ann Carey Q Mr. Stan Chambers Q Ms. Cynthia Cope Q Ms. Audney Cosand Q Mr. Larry L. Deaven Q Ms. Katherine B. Edwards and Mr. John A. Ronveaux In Biodegradable Pots Q Ms. Megan Evans and Mr. Howard M. Tucker Q Ms. Inger Fair Q Mr. and Mrs. Gary Fine Q Dr. and Mrs. John A. Floyd, Jr. Q Ms. Elisabeth French Q Mr. and Mrs. A.M. Gellman Q Mr. and Mrs. Michael Grant Q Dr. and Mrs. Thomas B. Hall, III Q Mr. Clark Halstead Q Mr. and Mrs. Herbert F. Hargroves Q Mr. and Mrs. Scott A. Harris Q Ms. Laura Hartman Q Ms. Rebecca Hartness Q Ms. Catherine M. Hayes Q Ms. Grace M. Hennes Q Ms. Nancy Hockstad Q Mr. and Mrs. Albert Huddleston Q Mr. Philip Huey Q Mr. and Mrs. Ridgely Huntt Q Mrs. Rose Johnston Q Mr. and Mrs. Thomas L. Keck Q Ms. Patricia Kitchings Q Mr. and Mrs. Charles Kittrell Q Ms. Patricia Leddy Q Mrs. Carolyn Marsh Lindsay Q Ms. JoAnn Luecke Q Mrs. Dorothy W. Marston Q Mr. and Mrs. James Masterson Q Ms. M. Terry McConnell Q Mr. and Mrs. Murray McGrew Q Mr. and Mrs. John McMurtrie Q Mr. and Mrs. Walter Montgomery, Jr. Q Mr. and Mrs. Peter Morris Q Mrs. Rosalie J. Morris Q Dr. and Mrs. David E. Morrison Q Mr. James R. Moxley, Jr. Q Mr. and Mrs. Ben Norwood Q Mr. and Mrs. Al Osman Q Ms. Julie Overbeck Q Ms. Johnnie Patricia Painter Q Ms. Melinda Papp Q Mr. and Mrs. Bill Paternotte Q Ms. Allison Porter Q Mrs. Lynn C. Rhomberg Q Ms. Nancy Ross Q Ms. Rachael A. Rowland Q Mr. Witney Schneidman Q Mr. and Mrs. Thomas Sedler Q Mr. Carroll L. Shry Q Mr. and Mrs. Charles H. Smith, Jr. Q Ms. Kathleen A. Smithgall Q Mr. Joseph B. Tompkins, Jr. Q Mr. and Mrs. Harry Tunis Q Mr. and Mrs. Tom Underwood Q Mrs. Angela M. Vikesland Q Mr. and Mrs. Robert D. Volk Q Mr. and Mrs. Charles F. Walton Q Ms. Elizabeth M. Wehrle Q Mrs. Corinne Winburn Q Mrs. Dudley B. White Q Mr. and Mrs. Donald Winship Q Dr. Dorothy Yang and Mr. Ray Carlsen HONORARY PRESIDENT’S COUNCIL (in memoriam) Ms. Louise Fruehling Q Mrs. Enid Haupt Q Mrs. John A. Lutz Q Mr. and Mrs. Bruce Miller Ms. Wilma L. Pickard Corporate Members Bonnie Plants Q The Care of Trees Q Chapel Valley Landscape Company Q Corona, Inc. Q The Espoma Company Q www.BonniePlants.com Monrovia Q Osmocote Q OXO Horticultural Partners Gardening With 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/ You Since 1918. Men’s Garden Clubs of America Q The Homestead in the Garden Symposium Q Inniswood Garden Society Q University of Nebraska–Lincoln 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 NE OF THE things I enjoy most about gardening is that no matter how EDITORIAL INTERN much you know, there’s always more to learn. I was reminded of this earlier Mary S. Chadduck this spring while attending the Colonial Williamsburg Garden Symposium CONTRIBUTING EDITOR O in Williamsburg, Virginia, an exceptional annual event Rita Pelczar the AHS has been connected with since 1965. Among CONTRIBUTING WRITER the many terrific speakers at this symposium, I was par- Carole Ottesen ticularly inspired by Rick Darke and Doug Tallamy, two EDITORIAL ADVISORY BOARD nationally recognized authors and speakers whose work CHAIR Ethne Clarke has been acknowledged with our own AHS Book Awards. Colorado Springs, Colorado Their passion for plants and gardens—expressed through Linda Askey their exceptional images and stories—is truly infectious. Birmingham, Alabama And their message about a garden’s role in providing Julie Chai Mountain View, California critical habitat and meshing with the natural world is a Mary Irish valuable one for all gardeners. San Antonio, Texas This symposium is but one of many such pro- Panayoti Kelaidis grams taking place throughout the year and all over Tom Underwood Denver, Colorado the country that offer the opportunity for gardeners Charlie Nardozzi to expand their knowledge and skills. If you’re looking for some top-notch horti- Burlington, Vermont cultural events to attend this year, be sure to check out the AHS national events Denny Schrock calendar on page 9 and the “Regional Happenings” section on page 56 of this issue Ames, Iowa of The American Gardener. Jessica Walliser For the AHS, our own National Children & Youth Garden Symposium happen- Pittsburgh, Pennsylvania ing this July in Austin, Texas, will be a highlight of the summer.
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