Friday, September 04, 2015

David Kuack

David Kuack


Field trials report

Trees, Ornamental & Bedding Plant

Researchers around the country report on what plants worked and what didn't in 2010.

February 23, 2011

Many of the 2010 field trial managers and coordinators reported temperatures above normal, especially during August. Precipitation wasn’t as much of a concern, although some locations did report extremes with too much or too little rain. On the pest and disease control front, a number of trial sites reported problems with Japanese beetles.

Heavy rains in early summer followed by high temperatures in August put a lot of mildew pressure on plants at the C. Raker and Sons trial gardens in Litchfield, Mich.


University of Guelph, Guelph Turfgrass Institute, Guelph, Ontario

May 24
Weather conditions: Early summer weather warm and wet, late summer warm and dry.
Pest/disease problems: Usual problems of white mold, powdery mildew and aphids. For the first time, they had damaging numbers of Japanese beetles.

Best performers:
Agastache: Bronze Foliage
Amaranthus: Mira
Cyperus: King Tut
Echinacea: Warm Color Shades and Razzmatazz
Eustoma: ABC 1-3 Misty Blue
Kniphofia: Peachy Cheeks
Lantana: Landmark Sunrise Rose
Perovskia atriplicifolia
Petunia: Supertunia Pretty Much Picasso

For more: Rodger Tschanz, University of Guelph, Department of Plant Agriculture,

Colorado State University, Fort Collins

Planted: Started May 27, finished June 18
Weather conditions: Cooler than normal June. Warm July and August with quite a few days hotter than 90°F.

Best performers:
Bulbine: Yellow Compact
Calibrachoa: MiniFamous Compact Orange
Impatiens: Fiesta Purple
New Guinea impatiens: Super Sonic Magenta
Pennisetum: Vertigo
Petunia: Littletunia Sweet Pink
Rudbeckia: Denver Daisy
Zinnia: Zowie! Yellow Flame

For more:
James Klett, Colorado State University, Department of Horticulture and Landscape Architecture, 970-491-7179;;

University of Georgia, Athens

Planted: Mid-April to mid-May
Weather conditions: From early June through September, the plants were subjected to above 90°F and often above 95°F with even higher heat indices. Sporadic rain fell, but irrigation was often required.
Pest/disease problems: Root rots in geraniums and vinca. Late in the season, the usual aphids, mites and caterpillars came calling.

Best performers:
Angelonia: Alonia Purple
Begonia: Super Olympia Pink Improved and Gryphon
Calibrachoa: Mini Famous Compact Saffron and Lindura Light Blue
Geranium: Caliente Orange
Impatiens: SunPatiens Compact White
Osteospermum: Crescendo Yellow
Portulaca: Pazazz Pink Glow
Scaevola: Outback Fan Dancer

For more: Meg Green, University of Georgia, 706-542-2471;;

Michigan State University Horticulture Gardens, East Lansing

Planted: May 17 through June 16
Weather conditions: Heavy rainfall in May and June. One storm in June had 70 mph winds. July was very dry and very hot. A lot of days in the high 80s and low 90s. Very little rainfall.
Pest/disease problems: In August, started to see some mildew on plants including zinnias.

Best performers:
Acalypha: Tiki Island Sunrise
Angelonia: Angelface Blue Improved
Argyranthemum: Flutterby Yellow
Begonia: Solenia Salmon
Cleome: Senorita Rosalita
Gaillardia: Arizona Red Shades
Impatiens: SunPatiens Spreading Corona
Petunia: White Ray and Cascadias Violet Skirt
Verbena: Empress Dark Red

For more: Katie McCarver, Michigan State University, 517-355-5191 Ext. 1329;;

Penn State University, SE Agriculture Research and Extension Center, Manheim

Planted: May 18-20
Weather conditions: Consistently high temperatures above 90°F with many days at or near 100°F. Little rain fell for weeks, then sudden downpours of 2-3 inches occurred along with winds exceeding 40 mph.
Pest/disease problems: During the hot temperatures in July, western flower thrips became a problem. Aphids were also a problem. Alternaria blight on petunia and calibrachoa.

Best performers:
Cuphea: Mellow Yellow
Echinacea: PowWow Wild Berry
Geranium: Savannah Hot Pink Sizzle and Moonlight Pink
Nemesia: Sunsatia Lemon Improved
Impatiens: SunPatiens Spreading Corona, SunPatiens Compact Blush Pink and Sunpatiens Compact White
Pennisetum: Jade Princess and Vertigo
Petunia: Littletunia Purple Blue
Portulaca: Pizzazz series

For more: Alan H. Michael, Penn State Cooperative Extension – Dauphin County, 717-921-8803;;

Dallas Arboretum and Botanical Garden

Planted: Annuals planted May 27, perennials planted in 2009.
Weather conditions: April and May showed usual weather patterns, with temperatures in the mid-80s and the normal amount of rainfall. June arrived and temperatures started to rise to the mid-90s with very little rainfall. No rain in July and temperatures rose into the high-90s with little relief after sunset. Since Aug. 1, temperatures were above 100°F with no signs of rain or a break in temperature.

Best performers:
Alternanthera: Little Ruby
Echinacea: Hot Papaya
Euphorbia: White Manaus
Gerbera: Drakensberg Daisy series
Lobularia: Snow Princess
Penstemon: Red Riding Hood
Petunia: Soleil Purple
Rudbeckia: Denver Daisy
Salvia: Wendy’s Wish
Scaevola: Surdiva Blue

For more: Jimmy Turner, Dallas Arboretum and Botanical Garden, 214-515-6580;;


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