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Trial Garden 2016

Bed Preparation and Planting

A 10,000 sq. ft. area behind the Fisher Greenhouse was rototilled in May. The soil was not amended, and the beds were mulched prior to planting with a 3-inch layer of wood chips.

Staff, interns and volunteers planted the selections on May 26. Seven plants of each variety were planted 1 ft. apart in rows, with 24-inch spacing between rows. The rows were organized into seven 8 ft. by 100 ft. beds.

The plant selections were organized in alphabetical order according to their botanical name, and identified by white labels listing their botanical name, cultivar, and supplier.

Maintenance

Once established, the Trial Garden received minimal maintenance. Staff irrigated the beds for the first two weeks, and applied an all-purpose soluble fertilizer (21-5-20) at planting and at the end of two weeks. No supplemental watering or fertilizer was provided for the remainder of the summer, nor were insecticides or fungicides applied. Staff hand-weeded as necessary. None of the trial plants were dead-headed or pruned.

Evaluations

The UDBG’s nursery manager evaluated the Trial Garden plants bi-weekly from July 1 through September 23. For each of the dates, the manager awarded each plant two scores: one based on flowering and the other based on foliage, taking into account attractiveness, pest and disease resistance, habit uniformity, and overall ornamental value. The overall scores for flowers and foliage represent the average of all individual scores for each category.

Score Foliage Flowers
5 Excellent Rich color; clean appearance All plants full of flowers
4 Very Good Good color; few imperfections Most plants with flowers
3 Good Good color generally; some minor problems Some plants with flowers
2 Fair Weak color; some significant problems Few flowers on plants
1 Poor Very poor color with sickly appearance No flowers
0 Poor All plants dead or almost dead

Weather

The following charts were generated from weather information obtained from Delaware Environmental Observing System Network at the UD Farm.


Angelonia angustifolia Angelface Super Blue (Summer snapdragon)

Average flower score: 1.9


Average foliage score: 4.6


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Angelonia angustifolia Angelface Super White (Summer snapdragon)

Average flower score: 2.4


Average foliage score: 4.7


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Angelonia angustifolia Angelface Super Pink (Summer snapdragon)

Average flower score: 1.1


Average foliage score: 3.9


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Angelonia angustifolia Perfectly Pink (Summer snapdragon)

Average flower score: 2.4


Average foliage score: 4.7


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Angelonia angustifolia Serenita Pink (Summer snapdragon)

Average flower score: 2.1


Average foliage score: 4.4


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Argyranthemun frutescens Butterfly (TM) (Marguerite daisy)

Average flower score: 3.7


Average foliage score: 4.9


Light condition: Sun


Source: Proven Winners


Comments: Comments:8/12 - Brown Spent Flowers


Flower and foliage scores by date:

Argyranthemun frutescens Pure White Butterfly (TM) (Marguerite daisy)

Average flower score: 3.4


Average foliage score: 4.7


Light condition: Sun


Source: Proven Winners


Comments: 8/12 - Brown Spent Flowers


Flower and foliage scores by date:

Artemisia stelleriana Quicksilver (TM) (Wormwood)

Average flower score: N/A


Average foliage score: 4.4


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Calibrachoa hybrid Superbells(R) Cherry Star (Calibrachoa)

Average flower score: 1.7


Average foliage score: 2.1


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Calibrachoa hybrid Coralberry Punch (Calibrachoa)

Average flower score: 1.4


Average foliage score: 1.7


Light condition: Sun


Source: Proven Winners


Comments: 8/26 - Foliage fried


Flower and foliage scores by date:

Calibrachoa hybrid Coralina (Calibrachoa)

Average flower score: 2.0


Average foliage score: 1.7


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Calibrachoa hybrid Evening Star (Calibrachoa)

Average flower score: 1.7


Average foliage score: 1.9


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Calibrachoa hybrid Grape Punch Imp (Calibrachoa)

Average flower score: 1.9


Average foliage score: 2.0


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Calibrachoa hybrid Hollywood Star (Calibrachoa)

Average flower score: 1.9


Average foliage score: 2.7


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Calibrachoa hybrid Morning Star (Calibrachoa)

Average flower score: 2.4


Average foliage score: 3.1


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Calibrachoa hybrid Pomegranate Punch (Calibrachoa)

Average flower score: 2.9


Average foliage score: 3.3


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Calibrachoa hybrid Red Imp (Calibrachoa)

Average flower score: 1.6


Average foliage score: 2.3


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Calibrachoa hybrid Strawberry Punch (Calibrachoa)

Average flower score: 2.1


Average foliage score: 2.7


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Calibrachoa hybrid Tropical Sunrise (Calibrachoa)

Average flower score: 2.0


Average foliage score: 2.7


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Calibrachoa hybrid Yellow Imp (Calibrachoa)

Average flower score: 2.1


Average foliage score: 1.6


Light condition: Sun


Source: Proven Winners


Comments: 8/26 - Foliage Fried


Flower and foliage scores by date:

Canna xgeneralis South Pacific Scarlet (Canna)

Average flower score: 3.4


Average foliage score: 4.6


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Canna xgeneralis Toucan Red (Canna)

Average flower score: 4.3


Average foliage score: 4.9


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Canna xgeneralis Toucan Rose (Canna)

Average flower score: 3.3


Average foliage score: 4.4


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Canna xgeneralis Toucan Scarlet (Canna)

Average flower score: 3.4


Average foliage score: 4.9


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Canna xgeneralis Toucan Yellow (Canna)

Average flower score: 4.0


Average foliage score: 4.7


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Capsicum annuum Black Olive (Ornamental pepper)

Average flower score: N/A


Average foliage score: 3.9


Light condition: Sun


Source: All-American Selections


Comments: 7/29 to 9/9 - Fruit!


Flower and foliage scores by date:

Capsicum annuum Numex Easter (Ornamental pepper)

Average flower score: N/A


Average foliage score: 4.0


Light condition: Sun


Source: All-American Selections


Comments: 7/1 to 9/9 - Fruit!


Flower and foliage scores by date:

Catharanthus rosea Jams N Jellies Blackberry (Rosy periwinkle)

Average flower score: 4.3


Average foliage score: 4.0


Light condition: Sun


Source: All-American Selections


Comments: None


Flower and foliage scores by date:

Colocasia esculenta Royal Hawaiian(R) Black Coral (Elephant Ear)

Average flower score: N/A


Average foliage score: 4.1


Light condition: Sun


Source: Proven Winne


Comments: Beetle damage to foliage


Flower and foliage scores by date:

Colocasia esculenta Royal Hawaiian(R) Hawaiian Punch (Elephant Ear)

Average flower score: N/A


Average foliage score: 4.9


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Colocasia esculenta Royal Hawaiian(R) Tropical Storm (Elephant Ear)

Average flower score: N/A


Average foliage score: 2.1


Light condition: Sun


Source: Proven Winners


Comments: /29 - looks burned, weak; 8/26 - foliage looks diseased


Flower and foliage scores by date:

Dahlia Dalina(R) Midi Corsica (Dahlia)

Average flower score: 1.4


Average foliage score: 3.9


Light condition: Sun


Source: All-American Selectio


Comments: None


Flower and foliage scores by date:

Dianthus interspecific hybrid Jolt(TM) Pink F1 (Sweet william )

Average flower score: 4.0


Average foliage score: 5.0


Light condition: Sun


Source: All-American Selections


Comments: None


Flower and foliage scores by date:

Echinacea xhybrida Cheyenne Spirit (Coneflower)

Average flower score: 3.0


Average foliage score: 3.7


Light condition: Sun


Source: All-American Selections


Comments: None


Flower and foliage scores by date:

Gaura lindheimeri Sparkle White (Lindheimer's beeblossom)

Average flower score: 3.0


Average foliage score: 4.3


Light condition: Sun


Source: All-American Selections


Comments: None


Flower and foliage scores by date:

Hedera helix Glacier (English Ivy)

Average flower score: N/A


Average foliage score: 2.1


Light condition: Sun


Source: All-American Selections


Comments: None


Flower and foliage scores by date:

Impatiens Bounce(TM) Pink Flame Balboufink (Impatiens)

Average flower score: 4.3


Average foliage score: 4.7


Light condition: Sun


Source: All-American Selections


Comments: 9/9- wilted


Flower and foliage scores by date:

Impatiens hawkeri Infinity(R) Lavender (Impatiens)

Average flower score: 1.6


Average foliage score: 1.9


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Impatiens SunPatiens(R) Spreading Shell Pink (Impatiens)

Average flower score: 4.3


Average foliage score: 4.3


Light condition: Sun


Source:


Comments: 9/9 - wilted


Flower and foliage scores by date:

Impatiens hawkeri Florific Sweet Orange (Impatiens)

Average flower score: 1


Average foliage score: 1.6


Light condition: Sun


Source: All-American Selections


Comments: 8/12 - 2 plants left


Flower and foliage scores by date:

Ipomoea batatas Sweet Caroline Bewitched After Midnight (Ornamental Sweet Potato)

Average flower score: N/A


Average foliage score: 5


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Ipomoea batatas Sweet Caroline Bewitched Green with Envy (Ornamental Sweet Potato)

Average flower score: N/A


Average foliage score: 5


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Ipomoea batatas Sweet Caroline Light Green (Ornamental Sweet Potato)

Average flower score: N/A


Average foliage score: 5


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Ipomoea batatas Sweet Caroline Sweetheart Lime (Ornamental Sweet Potato)

Average flower score: N/A


Average foliage score: 5.0


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Ipomoea batatas Sweet Caroline Raven (Ornamental Sweet Potato)

Average flower score: N/A


Average foliage score: 5


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Ipomoea batatas Sweet Caroline Sweetheart Jet Black (Ornamental Sweet Potato)

Average flower score: N/A


Average foliage score: 5


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Lamium maculatum Pink Chablis(R) (Dead Nettle)

Average flower score: 1.9


Average foliage score: 1.9


Light condition: Sun


Source: Proven Winners


Comments: 7/29 - burned 8/12 - all look dead


Flower and foliage scores by date:

Lamium maculatum Purple Chablis(R) (Dead Nettle)

Average flower score: 1.7


Average foliage score: 1.9


Light condition: Sun


Source: Proven Winners


Comments: 7/29 - burned 8/12 - all look dead


Flower and foliage scores by date:

Osteospermum hybrid Bright Lights Yellow (African Daisy)

Average flower score: 3.0


Average foliage score: 3.6


Light condition: Sun


Source: Proven Winners


Comments: 8/26 - 6 plants 9/9 - 2 plants left


Flower and foliage scores by date:

Osteospermum hybrid Daisy White (African Daisy)

Average flower score: 2.1


Average foliage score: 3.1


Light condition: Sun


Source: Proven Winners


Comments: 8/26 - 4 plants left


Flower and foliage scores by date:

Pelargonium xhortorum Brocade Cherry Night (Zonal Geranium)

Average flower score: 1.9


Average foliage score: 2.7


Light condition: Sun


Source: All-American Selections


Comments: None


Flower and foliage scores by date:

Pelargonium xhortorum Brocade Fire (Zonal Geranium)

Average flower score: 2.6


Average foliage score: 2.9


Light condition: Sun


Source: All-American Selections


Comments: None


Flower and foliage scores by date:

Pelargonium hybrid Timeless(R) Lavender (Geranium)

Average flower score: 3.9


Average foliage score: 4.0


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Pelargonium xhortorum Pinto Premium White to Red (Zonal Geranium)

Average flower score: 2.4


Average foliage score: 2.9


Light condition: Sun


Source: All-American Selections


Comments: None


Flower and foliage scores by date:

Petunia hybrid Supertunia(R) African Sunset (Petunia)

Average flower score: 3.1


Average foliage score: 2.7


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Petunia hybrid Supertunia(R) Daybreak Charm (Petunia)

Average flower score: 3.9


Average foliage score: 3.6


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Petunia hybrid Supertunia(R) Picasso in Purple (Petunia)

Average flower score: 3.9


Average foliage score: 3.9


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Petunia hybrid Supertunia(R) Pretty Much Picasso (Petunia)

Average flower score: 3.9


Average foliage score: 3.4


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Petunia hybrid Supertunia(R) Really Red (Petunia)

Average flower score: 3.7


Average foliage score: 3.1


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Petunia hybrid Supertunia(R) Trilogy Red (Petunia)

Average flower score: 3.1


Average foliage score: 2.1


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Petunia hybrid Supertunia(R) Vista Bubblegum (Petunia)

Average flower score: 3.6


Average foliage score: 4.7


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Petunia hybrid Supertunia(R) Vista Fuschia (Petunia)

Average flower score: 3.6


Average foliage score: 4.1


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Petunia hybrid Supertunia(R) Vista Silverberry (Petunia)

Average flower score: 3.9


Average foliage score: 4.0


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Salvia coccinea Summer Jewel Pink (Texas Sage)

Average flower score: 4.7


Average foliage score: 4.3


Light condition: Sun


Source: All-American Selections


Comments: None


Flower and foliage scores by date:

Salvia coccinea Summer Jewel White (Texas Sage)

Average flower score: 4.4


Average foliage score: 4.6


Light condition: Sun


Source: All-American Selections


Comments: None


Flower and foliage scores by date:

Sutera hybrid Snowstorm(R) Blue Bubbles (Bacopa)

Average flower score: 2.3


Average foliage score: 2.4


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Verbena hybrid Superbena(R) Royale Peachy Keen (Verbena)

Average flower score: 2.4


Average foliage score: 3.0


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Verbena hybrid Superbena(R) Royale Red (Verbena)

Average flower score: 2.4


Average foliage score: 4.1


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Verbena hybrid Superbena(R) Royale Romance (Verbena)

Average flower score: 2.4


Average foliage score: 3.4


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Verbena hybrid Superbena(R) Royale Whitecap (Verbena)

Average flower score: 2.4


Average foliage score: 4.1


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Viola xwittrockiana Anytime(R) Iris (Viola )

Average flower score: 3.7


Average foliage score: 2.1


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Viola xwittrockiana Anytime(R) Plum Good (Viola )

Average flower score: 3.3


Average foliage score: 2.3


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Viola xwittrockiana Anytime(R) Quartz Imp (Viola )

Average flower score: 3.6


Average foliage score: 2.3


Light condition: Sun


Source: Proven Winners


Comments: 8/12 - 2 plants left


Flower and foliage scores by date:

Viola xwittrockiana Anytime(R) Sugarplum (Viola )

Average flower score: 2.9


Average foliage score: 1.7


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Zinnia hybrida Profusion Double Deep Salmon (Zinnia)

Average flower score: 4.0


Average foliage score: 3.3


Light condition: Sun


Source: All-American Selections


Comments: 7/15 - flowers are down within foliage; 8/12 - foliage is falling; 8/26 - falling open


Flower and foliage scores by date:

Zinnia hybrida Profusion Double Hot Cherry (Zinnia)

Average flower score: 4.0


Average foliage score: 3.6


Light condition: Sun


Source: All-American Selections


Comments: 7/15 - flowers are down within foliage; 8/12 - foliage is falling; 8/26 - falling open


Flower and foliage scores by date:

Commons Names

Botanical Name


African daisy
Osteospermum

Bacopa
Sutera

Calibrachoa
Calibrachoa

Canna
Canna

Coneflower
Echinacea

Dahlia
Dahlia

Dead Nettle
Lamium

Dianthus
Dianthus

Elephant ear
Colocasia

English ivy
Hedera

Gaura
Gaura

Geranium
Pelargonium

Impatiens
Impatiens

Marguerite Daisy
Argyranthemum

Ornamental pepper
Capsicum

Ornamental sweet potato
Ipomoea

Petunia
Petunia

Salvia
Salvia

Summer snapdragon
Angelonia

Verbena
Verbena

Vinca
Catharanthus

Viola
Viola

Wormwood
Artmesia

Zinnia
Zinnia