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Trial Garden 2017

Bed Preparation and Planting

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

Staff and volunteers planted the selections on May 16 and 17. Seven plants of each variety were planted 1 ft. apart in rows, with 24 or 36-inch spacing between rows depending upon cultivar. 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 for the first 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

A graduate student at UDBG evaluated the Trial Garden plants every other week from June 29 through September 22. For each of the dates, the graduate student 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

Alternanthera Plum Dandy(TM) (Alternanthera)

Average flower score: N/A


Average foliage score: 4.6


Light condition: Sun


Source: Proven Winners


Comments: Great plant, clean foliage


Flower and foliage scores by date:

Angelonia angustifolia 'Serenita Pink' (Snapdragon)

Average flower score: 4.3


Average foliage score: 4.1


Light condition: Sun


Source: All American Selections (2014)


Comments: 7/14- 1 dead


Flower and foliage scores by date:

Argyranthemum frutescens Golden Butterfly(TM) (Marguerite Daisy)

Average flower score: 3.4


Average foliage score: 5.0


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Argyranthemum frutescens Pure White Butterfly(TM) (Marguerite Daisy)

Average flower score: 3.6


Average foliage score: 5.0


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Argyranthemum frutescens Vanilla Butterfly(R) (Imp) (Marguerite Daisy)

Average flower score: 2.6


Average foliage score: 4.9


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Bidens ferulifolia Campfire(R) Fireburst (Imp) (Bidens hybrid)

Average flower score: 3.7


Average foliage score: 4.4


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Calendula officinalis Lady Godiva(TM) Orange (English Marigold)

Average flower score: 2.9


Average foliage score: 4.4


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Calibrachoa Superbells(R) Blue Moon Punch(TM) (Million Bells)

Average flower score: 2.7


Average foliage score: 2.9


Light condition: Sun


Source: Source:


Comments: 9/8- 1 dead


Flower and foliage scores by date:

Calibrachoa Superbells(R) Double Orchid (Million Bells

Average flower score: 4.1


Average foliage score: 4.1


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Calibrachoa Superbells(R) Double Ruby (Million Bells)

Average flower score: 3.1


Average foliage score: 3.4


Light condition: Sun


Source: Proven Winners


Comments: 7/14- chlorotic foliage


Flower and foliage scores by date:

Calibrachoa Superbells(R) Over Easy(TM) (Million Bells)

Average flower score: 3.4


Average foliage score: 3.9


Light condition: Sun


Source: Proven Winners


Comments: 6/29- 2 dead


Flower and foliage scores by date:

Calibrachoa Superbells(R) Plum (Imp) (Million Bells)

Average flower score: 3.4


Average foliage score: 3.6


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Calibrachoa Superbells(R) Rising Star(TM) (Million Bells)

Average flower score: 3.6


Average foliage score: 3.9


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Canna ×generalis 'South Pacific Scarlet' (Canna Lily)

Average flower score: 4.3


Average foliage score: 4.6


Light condition: Sun


Source: All American Selections (2013)


Comments: 6/29, 7/14 & 7/28- Japanese beetle damage


Flower and foliage scores by date:

Canna Toucan(R) Coral (Canna Lily)

Average flower score: 4.4


Average foliage score: 4.7


Light condition: Sun


Source: Proven Winners


Comments: 6/29, 7/14 & 7/28- Japanese beetle damage


Flower and foliage scores by date:

Canna Toucan(R) Dark Orange (Canna Lily)

Average flower score: 4.4


Average foliage score: 4.6


Light condition: Sun


Source: Proven Winners


Comments: 6/29, 7/14 & 7/28- Japanese beetle damage


Flower and foliage scores by date:

Canna Toucan(R) Rose (Canna Lily)

Average flower score: 4.1


Average foliage score: 4.4


Light condition: Sun


Source: Proven Winners


Comments: 6/29, 7/14 & 7/28- Japanese beetle damage


Flower and foliage scores by date:

Canna Toucan(R) Scarlet (Canna Lily)

Average flower score: 4.7


Average foliage score: 4.7


Light condition: Sun


Source: Proven Winners


Comments: 6/29, 7/14 & 7/28- Japanese beetle damage


Flower and foliage scores by date:

Canna Toucan(R) Yellow (Canna Lily)

Average flower score: 4.9


Average foliage score: 4.6


Light condition: Sun


Source: Proven Winners


Comments: 6/29, 7/14 & 7/28- Japanese beetle damage


Flower and foliage scores by date:

Capsicum annuum 'NuMex Easter' (Ornamental Pepper)

Average flower score: N/A


Average foliage score: 4.1


Light condition: Sun


Source: All American Selections (2014)


Comments: 9/8- Nutrient deficiency


Flower and foliage scores by date:

Catharanthus roseus Mega Bloom 'Orchid Halo' (Vinca)

Average flower score: 4.3


Average foliage score: 4.3


Light condition: Sun


Source: All American Selections (2017)


Comments: None


Flower and foliage scores by date:

Catharanthus roseus Mega Bloom 'Pink Halo' (Vinca)

Average flower score: 4.4


Average foliage score: 4.7


Light condition: Sun


Source: All American Selections (2017)


Comments: None


Flower and foliage scores by date:

Celosia argentea 'Asian Garden' (Celosia)

Average flower score: 4.7


Average foliage score: 4.7


Light condition: Sun


Source: All American Selections (2017)


Comments: 6/29- Reddish, unhealthy foliage


Flower and foliage scores by date:

Cuphea ramosissima Fairy Dust(TM) Pink (Cigar Plant)

Average flower score: 4.7


Average foliage score: 4.6


Light condition: Sun


Source: Proven Winners


Comments: 9/8- plants are shaded by nearby plants


Flower and foliage scores by date:

Dahlia variabilis Dahlightful(R) Crushed Crimson (Dahlia)

Average flower score: 2.9


Average foliage score: 5.0


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Dahlia variabilis Dahlightful(R) Tupelo Honey (Dahlia)

Average flower score: 2.7


Average foliage score: 4.9


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Dianthus barbatus Jolt(TM) Pink (Dianthus)

Average flower score: 3.7


Average foliage score: 4.7


Light condition: Sun


Source: All American Selections (2015)


Comments: 6/29- Foliage looks diseased with curling, reddish leaves and necrosis


Flower and foliage scores by date:

Dianthus Supra Pink (Dianthus)

Average flower score: 3.6


Average foliage score: 4.7


Light condition: Sun


Source: All American Selections (2017)


Comments: None


Flower and foliage scores by date:

Echinacea × purpurea 'Cheyenne Spirit' (Coneflower)

Average flower score: 3.0


Average foliage score: 4.9


Light condition: Sun


Source: All American Selections (2013)


Comments: None


Flower and foliage scores by date:

Gaura lindheimeri 'Sparkle White' (Gaura)

Average flower score: 4.3


Average foliage score: 4.9


Light condition: Sun


Source: All American Selections (2014)


Comments: None


Flower and foliage scores by date:

Gaura lindheimeri Wanderful(TM) Petite Pink (Gaura)

Average flower score: 2.3


Average foliage score: 3.3


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Hypoestes phyllostachya Hypnotic(TM) Red (Polka Dot Plant)

Average flower score: N/A


Average foliage score: 4.6


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Hypoestes phyllostachya Hypnotic(TM) Rose (Polka Dot Plant)

Average flower score: N/A


Average foliage score: 4.9


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Impatiens hawkeri Florific(TM) Sweet Orange (New Guinea Impatiens)

Average flower score: 3.3


Average foliage score: 2.9


Light condition: Sun


Source: All American Selections (2014)


Comments: 7/14- 2 dead; 7/28- 3 dead


Flower and foliage scores by date:

Impatiens ×walleriana Bounce(TM) Pink Flame (New Guinea Impatiens)

Average flower score: 4.7


Average foliage score: 5.0


Light condition: Sun


Source: All American Selections (2015)


Comments: Wonderful plant, profusion of flowers throughout the season


Flower and foliage scores by date:

Impatiens ×walleriana SunPatiens(R) Shell Pink (New Guinea Impatiens)

Average flower score: 4.7


Average foliage score: 4.9


Light condition: Sun


Source: All American Selections (2015)


Comments: Wonderful plant, profusion of flowers throughout the season


Flower and foliage scores by date:

Lantana camara Luscious(R) Royale Cosmo (Lantana)

Average flower score: 4.4


Average foliage score: 4.4


Light condition: Sun


Source: Proven Winners


Comments: 7/28- 1 dead, 1 struggling plant; overall, a gorgeous plant


Flower and foliage scores by date:

Osteospermum ecklonis Akila(R) Daisy White (African Daisy)

Average flower score: 0.0


Average foliage score: 0.0


Light condition: Sun


Source: All American Selections (2014)


Comments: 6/29- all dead


Flower and foliage scores by date:

Osteospermum ecklonis Bright Lights(TM) Double Moonglow (African Daisy)

Average flower score: 0.0


Average foliage score: 0.0


Light condition: Sun


Source: Proven Winners


Comments: 6/29- all dead


Flower and foliage scores by date:

Pelargonium ×hortorum Brocade Cherry (Geranium)

Average flower score: 3.0


Average foliage score: 2.3


Light condition: Sun


Source: All American Selections


Comments: 6/29- 1 dead; 7/28- 3 dead


Flower and foliage scores by date:

Pelargonium ×hortorum Brocade Fire (Geranium)

Average flower score: 3.4


Average foliage score: 3.1


Light condition: Sun


Source: All American Selections (2017)


Comments: 6/29- 1 dead; 7/14- clorotic plants; 7/28; 2 dead


Flower and foliage scores by date:

Pelargonium ×hortorum Calliope(R) Medium Dark Red (Geranium)

Average flower score: 3.6


Average foliage score: 3.4


Light condition: Sun


Source: All American Selections (2017)


Comments: 7/28- 3 dead


Flower and foliage scores by date:

Pelargonium ×hortorum Pinto Premium White to Rose (Geranium)

Average flower score: 4.1


Average foliage score: 4.4


Light condition: Sun


Source: All American Selections (2013)


Comments: Best performing geranium in the trial gardens; resilient with beautiful flowers


Flower and foliage scores by date:

Pennisetum glaucum 'Jester' (Ornamental Millet)

Average flower score: 4.6


Average foliage score: 3.3


Light condition: Sun


Source: All American Selections


Comments: 7/14- Plants are weak and show pest damage; 7/28- 1 dead; 8/11- 2 weak plants


Flower and foliage scores by date:

Pennisetum glaucum 'Purple Majesty' (Ornamental Millet)

Average flower score: 4.3


Average foliage score: 2.9


Light condition: Sun


Source: All American Selections (2003)


Comments: 7/14- Plants are weak and show pest damage; 7/28- 2 dead; 9/8- 3 dead; 9/22- 5 dead


Flower and foliage scores by date:

Petunia ×atkinsiana 'Trilogy Red' (Petunia)

Average flower score: 2.9


Average foliage score: 2.6


Light condition: Sun


Source: All American Selections (2015)


Comments: 6/29- 1 dead; 7/28- 3 dead


Flower and foliage scores by date:

Petunia ×hybrida 'African Sunset' (Petunia)

Average flower score: 3.4


Average foliage score: 3.4


Light condition: Sun


Source: All American Selections (2014)


Comments: 6/29- 1 clorotic plant


Flower and foliage scores by date:

Petunia ×hybrida Tidal Wave(R) Red Velour (Petunia)

Average flower score: 3.7


Average foliage score: 4.3


Light condition: Sun


Source: All American Selections (2015)


Comments: None


Flower and foliage scores by date:

Petunia Supertunia(R) Bordeaux(TM) (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 Supertunia(R) Hot Pink Charm (Petunia)

Average flower score: 4.1


Average foliage score: 3.9


Light condition: Sun


Source: Proven Winners


Comments: 6/29-1 dead; 7/28- one struggling plant affected foliage score


Flower and foliage scores by date:

Petunia Supertunia(R) Lovie Dovie(TM) (Petunia)

Average flower score: 4.4


Average foliage score: 4.3


Light condition: Sun


Source: Proven Winners


Comments: 7/28- 1 dead


Flower and foliage scores by date:

Petunia Supertunia(R) Mulberry Charm (Petunia)

Average flower score: 3.9


Average foliage score: 3.6


Light condition: Sun


Source: Proven Winners


Comments: 6/29- 2 dead; 8/11- 1 plant struggling


Flower and foliage scores by date:

Petunia Supertunia(R) Royal Magenta(TM) (Imp) (Petunia)

Average flower score: 3.9


Average foliage score: 4.1


Light condition: Sun


Source: Proven Winners


Comments: 6/29- 1 dead; 7/28- 2 dead


Flower and foliage scores by date:

Petunia Supertunia(R) Vista(R) Bubblegum(R) (Petunia)

Average flower score: 4.4


Average foliage score: 4.7


Light condition: Sun


Source: Proven Winners


Comments: Profusely flowering plant


Flower and foliage scores by date:

Petunia Supertunia(R) Vista(R) Fuchsia (Petunia)

Average flower score: 3.7


Average foliage score: 4.3


Light condition: Sun


Source: Proven Winners


Comments: 7/28- 2 dead


Flower and foliage scores by date:

Petunia Supertunia(R) Vista(R) Silverberry (Petunia)

Average flower score: 4.4


Average foliage score: 4.0


Light condition: Sun


Source: Proven Winners


Comments: 6/29- 1 dead


Flower and foliage scores by date:

Phlox drumondii Intensia(R) Red Hot (Phlox)

Average flower score: 3.9


Average foliage score: 3.4


Light condition: Sun


Source: Proven Winners


Comments: 9/8- plants are shaded by nearby plants


Flower and foliage scores by date:

Phlox drumondii Intensia(R) White (Imp) (Phlox)

Average flower score: 4.1


Average foliage score: 3.1


Light condition: Sun


Source: Proven Winners


Comments: 7/28- 1 dead; 8/11- 3 dead plants


Flower and foliage scores by date:

Phlox Intensia(R) Blueberry (Phlox)

Average flower score: 3.1


Average foliage score: 3.6


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Salvia coccinea Summer Jewel(TM) White (Texas Sage)

Average flower score: 4.0


Average foliage score: 4.9


Light condition: Sun


Source: All American Selections (2015)


Comments: 6/29- 1 dead


Flower and foliage scores by date:

Salvia ×farinacea Rockin(TM) Playin' the Blues(R) (Salvia )

Average flower score: 4.7


Average foliage score: 4.9


Light condition: Sun


Source: Proven Winners


Comments: 7/14- 1 dead


Flower and foliage scores by date:

Salvia Rockin(TM) Deep Purple(R) (Salvia)

Average flower score: 3.7


Average foliage score: 5.0


Light condition: Sun


Source: Proven Winners


Comments: 8/11- plants is finishing flowering but calyxes are still effective


Flower and foliage scores by date:

Verbena peruviana EnduraScape(TM) Pink Bicolor (Verbena)

Average flower score: 3.3


Average foliage score: 4.1


Light condition: Sun


Source: All American Selections (2017)


Comments: None


Flower and foliage scores by date:

Verbena Superbena(R) Royale Cherryburst (Verbena)

Average flower score: 2.9


Average foliage score: 3.4


Light condition: Sun


Source: Proven Winners


Comments: 6/29- 2 dead


Flower and foliage scores by date:

Verbena Superbena(R) Stormburst (Verbena)

Average flower score: 3.7


Average foliage score: 4.1


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Verbena Superbena(R) Violet Ice (Verbena)

Average flower score: 3.1


Average foliage score: 3.6


Light condition: Sun


Source: Proven Winners


Comments: 6/29- 1 dead


Flower and foliage scores by date:

Zinnia marylandica Profusion Double Deep Salmon (Zinnia)

Average flower score: 4.4


Average foliage score: 3.7


Light condition: Sun


Source: All American Selections (2013)


Comments: 6/29- 1 dead; 7/28- 2 dead; 8/25- plants are splaying open


Flower and foliage scores by date:

Zinnia marylandica Profusion Double Hot Cherry (Zinnia)

Average flower score: 5.0


Average foliage score: 3.9


Light condition: Sun


Source: All American Selections (2013)


Comments: 6/29- 1 dead; 7/14- 2 dead; 8/25- plants are splaying open


Flower and foliage scores by date:

Zinnia marylandica Profusion Red (Zinnia)

Average flower score: 4.9


Average foliage score: 3.7


Light condition: Sun


Source: All American Selections (2017)


Comments: 8/25- plants are splaying open


Flower and foliage scores by date:

Commons Names

Botanical Name


African Daisy
Osteospermum

Alternanthera
Alternanthera

Bidens hybrid
Bidens

Canna Lily
Canna

Celosia
Celosia

Cigar Plant
Cuphea

Coneflower
Echinacea

Dahlia
Dahlia

Dianthus
Dianthus

English Marigold
Calendula

Gaura
Gaura

Geranium
Pelargonium

Lantana
Lantana

Marguerite Daisy
Argyranthemum

Million Bells
Calibrachoa

New Guinea Impatiens
Impatiens

Ornamental Millet
Pennisetum

Ornamental Pepper
Capsicum

Petunia
Petunia

Phlox
Phlox

Polka Dot Plant
Hypoestes

Salvia
Salvia

Snapdragon
Angelonia

Texas Sage
Salvia

Verbena
Verbena

Vinca
Catharanthus

Zinnia
Zinnia