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Trial Garden 2019

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 21st and the 22nd. 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

The Horticulture Manager at UDBG evaluated the Trial Garden plants every other week from June 28th through September 30th. For each of the dates, plants were awarded three scores: one based on flowering, one based on foliage, and this year we added one more category, habit. Habit evaluates how uniform the plants grow, if all 7 plants are different sizes, the score is lower, if they are all very close in size, they get a good score. Habit also takes into account how well the plant holds its form, does it splay in time? Or does it stand tall and keep form throughout the season? The overall scores for flowers and foliage represent the average of all individual scores for each category.

Weather

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

 

Bidens ferufolia Goldilocks Rocks(R) Goldilocks Rocks Beggarticks

Average flower score: 0.9


Average foliage score: 3.4


Light condition: Full Sun


Source: Proven Winners


Comments: Nice flowers in early summer, nice habit. Flowers did not last into the summer well.


Flower and foliage scores by date:

Bidens Campfire(R) Campfire Beggarticks

Average flower score: 2.4


Average foliage score: 4.1


Light condition: Full Sun


Source: Proven Winners


Comments: Good Flowering through July, nice compact habit


Flower and foliage scores by date:

Calibrachoa Superbells Blackberry Punch(R) Blackberry Punch Million Bells

Average flower score: 2.1


Average foliage score: 1.4


Light condition: Full Sun


Source: Proven Winners


Comments: 3/7 Plants died by 8/23/19


Flower and foliage scores by date:

Calibrachoa Superbells Dreamsicle(R) Dreamsicle Million Bells

Average flower score: 1.8


Average foliage score: 1.5


Light condition: Full Sun


Source: Proven Winners


Comments: Only 2/7 plants survived the summer, remaining plants in ill health.


Flower and foliage scores by date:

Calibrachoa Superbells Honeyberry(R) Honeyberry Million Bells

Average flower score: 0.9


Average foliage score: 1.4


Light condition: Full Sun


Source: Proven Winners


Comments: 1/7 Plants survived the summer months. Remaining plant in poor health.


Flower and foliage scores by date:

Calibrachoa Superbells Watermelon Punch(R) Watermelon Punch Million Bells

Average flower score: 2.8


Average foliage score: 2.6


Light condition: Full Sun


Source: Proven Winners


Comments: All plants dead by 8/23/19


Flower and foliage scores by date:

Calibrachoa Superbells Tabletop Blue(R) Tabletop Blue Million Bells

Average flower score: 1.2


Average foliage score: 1.6


Light condition: Full Sun


Source: Proven Winners


Comments: All plants dead as of 9/20/19


Flower and foliage scores by date:

Calibrachoa Superbells Tabletop White(R) Tabletop White Million Bells

Average flower score: 2.2


Average foliage score: 2.7


Light condition: Full Sun


Source: Proven Winners


Comments: All plants dead as of 9/30/19


Flower and foliage scores by date:

Calibrachoa Superbells Tabletop Red(R) Tabletop Red Million Bells

Average flower score: 1.2


Average foliage score: 1.8


Light condition: Full Sun


Source: Proven Winners


Comments: 2 Plants made it through the summer, poor health overall.


Flower and foliage scores by date:

Calibrachoa Superbells Double Orange(R) Double Orange Million Bells

Average flower score: 1.6


Average foliage score: 1.8


Light condition: Full Sun


Source: Proven Winners


Comments: 3 Plants survived the summer months, poor health overall.


Flower and foliage scores by date:

Calibrachoa Superbells Double Amber(R) Double Amber Million Bells

Average flower score: 1.9


Average foliage score: 1.9


Light condition: Full Sun


Source: Proven Winners


Comments: 3/7 Plants survived the summer months, weak to poor health.


Flower and foliage scores by date:

Calibrachoa Superbells Double Blue(R) Double Blue Million Bells

Average flower score: 2


Average foliage score: 2.3


Light condition: Full Sun


Source: Proven Winners


Comments: 5/7 Plants survived summer, poor health overall, many pest problems.


Flower and foliage scores by date:

Capsicum annum Fire Away Hot and Heavy(R) Fire Away Hot and Heavy Ornamental Pepper

Average flower score: 0.1


Average foliage score: 4.3


Light condition: Full Sun


Source: Proven Winners


Comments: Fruiting throughout the summer, peak in Late July


Flower and foliage scores by date:

Euphorbia Diamond Snow(R) Diamond Snow Spurge

Average flower score: 4.4


Average foliage score: 4.1


Light condition: Full Sun


Source: Proven Winners


Comments: Great flowering throughout the summer, withstood a large drought period.


Flower and foliage scores by date:

Gaillardia aristata Heat It Up Scarlet(R) Heait It Up Scarlet Blanket Flower

Average flower score: 3.0


Average foliage score: 3.6


Light condition: Full Sun


Source: Proven Winners


Comments: Plant splayed out shortly after establishment, 6/7 survived the summer.


Flower and foliage scores by date:

Gaillardia aristata Heat It Up Yellow(R) Heat It Up Yellow Blanket Flower

Average flower score: 2.2


Average foliage score: 3.0


Light condition: Full Sun


Source: Proven Winners


Comments: Plant splayed shortly after installation, 6/7 survived the summer.


Flower and foliage scores by date:

Helianthus annus Suncredible(R) Suncredible Sunflower

Average flower score: 4.4


Average foliage score: 4.8


Light condition: Full Sun


Source: Proven Winners


Comments: Fantastic flowering throughout the summer, performed well in wet and drought periods.


Flower and foliage scores by date:

Impatiens hawkeri Rockapulco Orange(R) Rockapulco Orange Impatiens

Average flower score: 3.1


Average foliage score: 4.3


Light condition: Full Sun


Source: Proven Winners


Comments: Slight foliage damage during the long drought period over the summer.


Flower and foliage scores by date:

Ipomoea batatas Sweet Caroline Red Hawk(R) Sweet Caroline Red Hawk Ornamental Sweet Potato

Average flower score: 0.0


Average foliage score: 4.7


Light condition: Full Sun


Source: Proven Winners


Comments: Excellent foliage display and good habit, no insect issues even in stressed environment.


Flower and foliage scores by date:

Isotoma axillaris Patti's Pink(R) Patti's Pink Laurentia

Average flower score: 1.1


Average foliage score: 2.8


Light condition: Full Sun


Source: Proven Winners


Comments: 1/7 survived summer months, remaining plant declining and weak.


Flower and foliage scores by date:

Lantana camara Luscious Goldengate(R) Luscious Goldengate Lantana

Average flower score: 3.4


Average foliage score: 4.6


Light condition: Full Sun


Source: Proven Winners


Comments: Flowered throughout the summer, no pest damage.


Flower and foliage scores by date:

Nemesia strumosa Aromance Pink(R) Aromance Pink Nemesia

Average flower score: 2.9


Average foliage score: 4.0


Light condition: Full Sun


Source: Proven Winners


Comments:


Flower and foliage scores by date:

Nemesia strumosa Sunsatia Cranberry Red(R) Cranberry Red Nemesia

Average flower score: 0.8


Average foliage score: 2.0


Light condition: Full Sun


Source: Proven Winners


Comments: 3/7 died two weeks after installation, rest of grouping were in poor health throughout summer.


Flower and foliage scores by date:

Osteospermum ecklonis Bright Lights Berry Rose(R) Berry Rose African Daisy

Average flower score: 2.1


Average foliage score: 2.9


Light condition: Full Sun


Source: Proven Winners


Comments: All plants dead as of 8/23/19


Flower and foliage scores by date:

Osteospermum ecklonis Bright Lights Purple(R) Purple African Daisy

Average flower score: 0.5


Average foliage score: 1


Light condition: Full Sun


Source: Proven Winners


Comments: All plants dead as of 7/12/19


Flower and foliage scores by date:

Ostespermum ecklonis Bright Lights White(R) White African Daisy

Average flower score: 2.0


Average foliage score: 2.8


Light condition: Full Sun


Source: Proven Winners


Comments: 6/7 Plants died as of 6/28/19, last specimen died as of 8/23/19


Flower and foliage scores by date:

Pentas lanceolata Sunstar Lavender(R) Lavender Starcluster

Average flower score: 2.9


Average foliage score: 3.9


Light condition: Full Sun


Source: Proven Winners


Comments: Reflushed well with an influx of precipitation in late summer


Flower and foliage scores by date:

Pentas lanceolata Sunstar Pink(R) Pink Starcluster

Average flower score: 2.3


Average foliage score: 3.5


Light condition: Full Sun


Source: Proven Winners


Comments: Reflushed well with late summer precipitation


Flower and foliage scores by date:

Pentas lanceolata Sunstar Red(R) Red Starcluster

Average flower score: 2.4


Average foliage score: 3.8


Light condition: Full Sun


Source: Proven Winners


Comments: 1 plant died as of 7/26/19, rest reflushed well once the drought broke.


Flower and foliage scores by date:

Pentas lanceolata Sunstar Rose(R) Rose Starcluster

Average flower score: 2.6


Average foliage score: 3.9


Light condition: Full Sun


Source: Proven Winners


Comments: Plants became very stressed in drought conditions, bounced back well.


Flower and foliage scores by date:

Petunia xhybrida Supertunia Mini Vistal Indigo(R) Mini Vistal Indigo Petunia

Average flower score: 4.6


Average foliage score: 3.9


Light condition: Full Sun


Source: Proven Winners


Comments: Insect damage noticed in the height of the drought


Flower and foliage scores by date:

Petunia xhybrida Supertunia Raspberry Rush(R) Raspberry Rush Petunia

Average flower score: 4.2


Average foliage score: 3.0


Light condition: Full Sun


Source: Proven Winners


Comments: Good flowering throughout summer, foliage suffered in drought conditions.


Flower and foliage scores by date:

Petunia xhybrida Supertunia Sharon(R) Sharon Petunia

Average flower score: 4.1


Average foliage score: 4.2


Light condition: Full Sun


Source: Proven Winner


Comments: An all around good selection in the world of Petunias.


Flower and foliage scores by date:

Petunia xhybrida Supertunia Vista Snowdrift(R) Vista Snowdrift Petunia

Average flower score: 4.6


Average foliage score: 4.0


Light condition: Full Sun


Source: Proven Winner


Comments: Slight leaf damage in height of the drought.


Flower and foliage scores by date:

Portulaca grandiflora Mojave Red(R) Mojave Red Pursley

Average flower score: 3.0


Average foliage score: 4.0


Light condition: Full Sun


Source: Proven Winners


Comments: Recovered and flushed well after drought conditions were broken.


Flower and foliage scores by date:

Salvia Unplugged So Blue(R) So Blue Sage

Average flower score: 3.5


Average foliage score: 3.4


Light condition: Full Sun


Source: Proven Winners


Comments: Slight splaying noticed in mid summer.


Flower and foliage scores by date:

Salvia xfarinacea Rockin' Blue Suede Shoes(R) Rockin' Blue Suede Shoes Sage

Average flower score: 1.8


Average foliage score: 3.6


Light condition: Full Sun


Source: Proven Winners


Comments: At its peak, this plant never pushed the flowers as well as expected.


Flower and foliage scores by date:

Scaevola aemula Whirlwind Blue(R) Whirlwind Blue Fan Flower

Average flower score: 3.1


Average foliage score: 3.8


Light condition: Full Sun


Source: Proven Winners


Comments:


Flower and foliage scores by date:

Solenostemon scutellerioides ColorBlaze Wicked Hot(R) Wicked Hot Coleus

Average flower score: 0.0


Average foliage score: 3.9


Light condition: Full Sun


Source: Proven Winners


Comments: Splaying occurred as the drought ran along. Foliage damaged during those stressed periods.


Flower and foliage scores by date:

Solenostemon scutellerioides ColorBlaze Wicked Witch(R) Wicked Witch Coleus

Average flower score: 0.0


Average foliage score: 3.6


Light condition: Full Sun


Source: Proven Winners


Comments: All plants dead as of 8/23/19


Flower and foliage scores by date:

Sutera cordata Snowstorm Pink(R) Snowstorm Pink Bacopa

Average flower score: 0.3


Average foliage score: 1.4


Light condition: Full Sun


Source: Proven Winners


Comments: 3/7 Survived summer, remaining plants in poor health.


Flower and foliage scores by date:

Sutera cordata Snowstorm Rose(R) Snowstorm Rose Bacopa

Average flower score: 0.7


Average foliage score: 1.9


Light condition: Full Sun


Source: Proven Winners


Comments: Poor health over the entire trial period.


Flower and foliage scores by date:

Verbena Superbena Sparkling Amethyst(R) Sparkling Amethyst Verbena

Average flower score: 1.5


Average foliage score: 2.6


Light condition: Full Sun


Source: Proven Winners


Comments:


Flower and foliage scores by date:

Verbena Superbena Sparkling Rose(R) Sparkling Rose Verbena

Average flower score: 0.8


Average foliage score: 1.8


Light condition: Full Sun


Source: Proven Winners


Comments:


Flower and foliage scores by date:

Commons Names

Botanical Name


Beggarticks
Bidens

Million Bells
Calibrachoa

Ornamental Pepper
Capsicum

Spurge
Euphorbia

Blanket Flower
Gaillardia

Sun Flower
Helianthus

Impatiens
Impatiens

Ornamental Sweet Potato
Ipomoea

Laurentia
Isotoma

Lantana
Lantana

Nemesia
Nemesia

African Daisy
Osteospermum

Starcluster
Pentas

Pursley
Portulaca

Sage
Salvia

Fan Flower
Scaevola

Coleus
Solenostemon

Bacopa
Sutera

Verbena
Verbena