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Trial Garden 2015

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 June 28 through September 20. 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 Serenita (TM) Pink (summer snapdragon)

Average flower score: 3.0


Average foliage score: 4.0


Light condition: Sun


Source: All-America Selections


Comments: None


Flower and foliage scores by date:

Bidens Campfire(TM) Fireburst (bidens)

Average flower score: 3.0


Average foliage score: 4.6


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Brassica oleracea Glamour Red (ornamental kale)

Average flower score: 1.0


Average foliage score: 4.6


Light condition: Sun


Source: All-America Selections


Comments: None


Flower and foliage scores by date:

Browallia Endless (TM) Flirtation (browallia)

Average flower score: 2.1


Average foliage score: 1.1


Light condition: Sun


Source: Proven Winners


Comments: Only 2 plants


Flower and foliage scores by date:

Browallia Endless (TM) Illumination (browallia)

Average flower score: 4.6


Average foliage score: 3.1


Light condition: Sun


Source: Proven Winners


Comments: Only 5 plants


Flower and foliage scores by date:

Calibrachoa Superbells (R) Evening Star (calibrachoa)

Average flower score: 3.9


Average foliage score: 3.9


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Calibrachoa Superbells (R) Garden Rose (calibrachoa)

Average flower score: 4.1


Average foliage score: 4.3


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Calibrachoa Superbells (R) Holy Moly!(TM) (calibrachoa)

Average flower score: 4.1


Average foliage score: 4.0


Light condition: Sun


Source: Proven Winner


Comments: None


Flower and foliage scores by date:

Canna South Pacific Scarlet (canna)

Average flower score: 3.6


Average foliage score: 4.6


Light condition: Sun


Source: All-America Selections


Comments: 7/20 and 8/3 -- Japanese beetles; 8/17 -- Browning flowers unattractive


Flower and foliage scores by date:

Capsicum annuum Black Olive (ornamental pepper)

Average flower score: 2.3


Average foliage score: 5.0


Light condition: Sun


Source: All-America Selections


Comments: 9/14 - fruit; 9/28 -- fruit is turning red, amazing


Flower and foliage scores by date:

Capsicum annuum NuMex Easter (ornamental pepper)

Average flower score: 1.7


Average foliage score: 3.9


Light condition: Sun


Source: All-America Selections


Comments: Attractive fruit throughout the season


Flower and foliage scores by date:

Catharanthus rosea Jams 'N Jellies Blackberry (vinca)

Average flower score: 4.7


Average foliage score: 4.6


Light condition: Sun


Source: All-America Selections


Comments: None


Flower and foliage scores by date:

Dahlia variabilis Dahlightful(TM) Georgia Peach (dahlia)

Average flower score: 0.6


Average foliage score: 0.6


Light condition: Sun


Source: Proven Winners


Comments: 7/20 -- Only 1 plant left


Flower and foliage scores by date:

Dahlia variabilis Dahlightful(TM) Lively Lavender (dahlia)

Average flower score: 2.3


Average foliage score: 2.6


Light condition: Sun


Source: Proven Winners


Comments: 8/3 -- Mildew


Flower and foliage scores by date:

Dahlia variabilis Dahlightful(TM) Sultry Scarlet (dahli

Average flower score: 2.1


Average foliage score: 3.9


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Dahlia Mystic Illusion (dahlia)

Average flower score: 1.6


Average foliage score: 4.6


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Dianthus Jolt(TM) Pink (dianthus)

Average flower score: 3.4


Average foliage score: 3.6


Light condition: Sun


Source: All-America Selections


Comments: None


Flower and foliage scores by date:

Diascia Flirtation(R) Glacier White (twinspur)

Average flower score: 2.7


Average foliage score: 2.4


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Echinacea Cheyenne Spirit (coneflower)

Average flower score: 2.4


Average foliage score: 4.0


Light condition: Sun


Source: All-America Selections


Comments: None


Flower and foliage scores by date:

Gaillardia aristata Arizona Apricot (blanket flower)

Average flower score: 3.4


Average foliage score: 4.0


Light condition: Sun


Source: All-America Selections


Comments: 9/14 - attractive seedheads


Flower and foliage scores by date:

Gaura lindheimeri Sparkle White (gaura)

Average flower score: 3.3


Average foliage score: 4.0


Light condition: Sun


Source: All-America Selections


Comments: None


Flower and foliage scores by date:

Geranium ×hortorum Pinto Premium White to Rose (geranium)

Average flower score: 3.1


Average foliage score: 4.3


Light condition: Sun


Source: All-America Selections


Comments: 8/17 -- Browning flowers unattractive


Flower and foliage scores by date:

Gerbera Hello!(TM) Pumpkin (gerber daisy)

Average flower score: 0.0


Average foliage score: 0.0


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Impatiens Bounce(TM) Pink Flame (impatiens)

Average flower score: 4.6


Average foliage score: 5.0


Light condition: Sun


Source: All-America Selections


Comments: None


Flower and foliage scores by date:

Impatiens New Guinea Florific(TM) Sweet Orange

Average flower score: 2.1


Average foliage score: 2.1


Light condition: Sun


Source: All-America Selections


Comments: None


Flower and foliage scores by date:

Impatiens SunPatiens Spreading(R) Shell Pink (impatiens

Average flower score: 4.6


Average foliage score: 5.0


Light condition: Sun


Source: All-America Selections


Comments: None


Flower and foliage scores by date:

Impatiens Rockapulco(R) Wisteria (impatiens, double)

Average flower score: 3.6


Average foliage score: 3.9


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Ipomoea Sweet Caroline Sweetheart Purple (ornamental sweet potato)

Average flower score: 1.0


Average foliage score: 4.9


Light condition: Sun


Source: Proven Winners


Comments: 7/20 -- Holes in leaves


Flower and foliage scores by date:

Lantana camara Luscious(R) Pinkberry Blend (lantana)

Average flower score: 4.9


Average foliage score: 4.7


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Laurentia axillaris Beth's Blue(R) (blue star flower)

Average flower score: 2.0


Average foliage score: 3.1


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Lobelia erinus Lucia(R) Ultraviolet (lobelia)

Average flower score: 4.7


Average foliage score: 2.7


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Nemesia Sunsatia(R) Blood Orange (nemesia)

Average flower score: 0.1


Average foliage score: 0.1


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Osteospermum Akila(R) Daisy White (African daisy)

Average flower score: 0.4


Average foliage score: 0.6


Light condition: Sun


Source: All-America Selections


Comments: 7/20 -- Only 1 plant left


Flower and foliage scores by date:

Petunia African Sunset (petunia)

Average flower score: 4.0


Average foliage score: 4.3


Light condition: Sun


Source: All-America Selections


Comments: None


Flower and foliage scores by date:

Petunia Picasso In B (petunia)

Average flower score: 1.6


Average foliage score: 1.1


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Petunia Supertunia(R) Honey (petunia)

Average flower score: 3.6


Average foliage score: 2.7


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Petunia Supertunia(R) Indigo Charm (petunia)

Average flower score: 3.7


Average foliage score: 3.6


Light condition: Sun


Source: Proven Winners


Comments: 7/20 -- Only 4 plants left


Flower and foliage scores by date:

Petunia Supertunia(R) Latte (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 Supertunia(R) Morning Glory Charm (petunia)

Average flower score: 4.0


Average foliage score: 4.3


Light condition: Sun


Source: Proven Winners


Comments: 7/20 -- Only 3 plants left


Flower and foliage scores by date:

Petunia Supertunia(R) Orchid Charm (petunia)

Average flower score: 3.7


Average foliage score: 3.7


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Petunia Supertunia(R) Pink Star Charm (petunia)

Average flower score: 4.0


Average foliage score: 4.7


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Petunia Supertunia(R) Rose Blast Charm (petunia)

Average flower score: 3.9


Average foliage score: 3.7


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Petunia Supertunia(R) Sangria Charm (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 Supertunia(R) Violet Star Charm (petunia)

Average flower score: 4.1


Average foliage score: 4.0


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

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

Average flower score: 4.0


Average foliage score: 5.0


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Petunia Supertunia(R) Vista Fuschia (petunia)

Average flower score: 4.0


Average foliage score: 4.9


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Petunia Supertunia(R) Vista Silverberry (petunia)

Average flower score: 4.0


Average foliage score: 4.7


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Petunia Supertunia(R) Watermelon Charm (petunia)

Average flower score: 3.3


Average foliage score: 2.7


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Petunia Tidal Wave(R) Red Velour (petunia)

Average flower score: 3.6


Average foliage score: 4.6


Light condition: Sun


Source: All-America Selections


Comments: None


Flower and foliage scores by date:

Phlox Intensia(R) White (phlox)

Average flower score: 3.1


Average foliage score: 1.1


Light condition: Sun


Source: Proven Winners


Comments: 8/17 -- Only 1 plant left


Flower and foliage scores by date:

Portulaca Mojave(R) Fuschia (purslane)

Average flower score: 4.3


Average foliage score: 3.9


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Portulaca Mojave(R) Pink (purslane)

Average flower score: 4.1


Average foliage score: 4.6


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Portulaca Mojave(R) Red (purslane)

Average flower score: 3.9


Average foliage score: 4.1


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Portulaca Mojave(R) Tangerine (purslane)

Average flower score: 4.1


Average foliage score: 4.6


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Portulaca Mojave(R) Yellow (purslane)

Average flower score: 4.3


Average foliage score: 4.6


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Salvia Summer Jewel Pink (salvia)

Average flower score: 3.9


Average foliage score: 3.3


Light condition: Sun


Source: All-America Selections


Comments: None


Flower and foliage scores by date:

Salvia Summer Jewel Red (salvia)

Average flower score: 4.4


Average foliage score: 4.0


Light condition: Sun


Source: All-America Selections


Comments: None


Flower and foliage scores by date:

Salvia Summer Jewel White (salvia)

Average flower score: 4.9


Average foliage score: 4.1


Light condition: Sun


Source: All-America Selections


Comments: None


Flower and foliage scores by date:

Sedum Lemon Coral(TM) (sedum)

Average flower score: 1.0


Average foliage score: 4.9


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Solenostemon ColorBlaze(R) Apple Brandy(TM) (coleus)

Average flower score: 1.0


Average foliage score: 4.1


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Solenostemon ColorBlaze(R) Velveteen(TM) (coleus)

Average flower score: 1.4


Average foliage score: 4.3


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Verbena Meteor Shower(TM) (verbena)

Average flower score: 3.0


Average foliage score: 3.0


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Verbena Superbena(R) Sparkling Amethyst (verbena)

Average flower score: 1.9


Average foliage score: 2.0


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Verbena Superbena(R) Sparkling Ruby (verbena)

Average flower score: 2.1


Average foliage score: 1.7


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Viola ×wittrockiana Anytime(R) Iris (viola)

Average flower score: 0.0


Average foliage score: 0.0


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Viola ×wittrockiana Anytime(R) Plum Good (viola)

Average flower score: 0.3


Average foliage score: 0.3


Light condition: Sun


Source: Proven Winners


Comments: None


Flower and foliage scores by date:

Viola cornuta Shangri-La Marina (viola)

Average flower score: 1.6


Average foliage score: 1.0


Light condition: Sun


Source: All-America Selections


Comments: None


Flower and foliage scores by date:

Zinnia Profusion Double Deep Salmon' (zinnia)

Average flower score: 4.1


Average foliage score: 4.3


Light condition: Sun


Source: All-America Selections


Comments: None


Flower and foliage scores by date:

Zinnia Profusion Double Hot Cherry (zinnia)

Average flower score: 4.6


Average foliage score: 4.6


Light condition: Sun


Source: All-America Selections


Comments: None


Flower and foliage scores by date:

Commons Names

Botanical Name


African daisy
Osteospermum

Bidens
Bidens

Blanket flower
Gaillardia

Blue star flower
Laurentia

Browallia
Browallia

Calibrachoa
Calibrachoa

Canna
Canna

Coleus
Solenostemon

Coneflower
Echinacea

Dahlia
Dahlia

Dianthus
Dianthus

Gaura
Gaura

Geranium
Geranium

Gerber daisy
Gerbera

Impatiens
Impatiens

Lantana
Lantana

Lobelia
Lobelia

Nemesia
Nemesia

Ornamental kale
Brassica

Ornamental pepper
Capsicum

Ornamental sweet potato
Ipomoea

Petunia
Petunia

Phlox
Phlox

Purslane
Portulaca

Salvia
Salvia

Sedum
Sedum

Summer snapdragon
Angelonia

Twinspur
Diascia

Verbena
Verbena

Vinca
Catharanthus

Viola
Viola

Zinnia
Zinnia