824 research outputs found
Circular 119
The annual flower trials were planted from 30 May through 2 June, 2000 in the Perennial Landscape and All America Selections
Display Garden of the Georgeson Botanical Garden (64°51/N,
147°52'W ). Fairbanks silt loam soil was fertilized with 10-20-20S (4 lbs per 100 sq feet; 195 g
per sq meter) on 28 May. With the exception of dahlias, all flowers were grown as seedling
transplants, and were hardened off outdoors for one week prior to transplanting. Tuberous roots of dahlias were planted in containers five weeks prior to transplanting and were hardened off
Circular 114
Trials were begun in 1989 at the Georgeson Botanical Garden (64°51’N, 147° 52’W, elevation 475
feet; 136 meters) to evaluate the hardiness and ornamental potential of trees, shrubs, and herbaceous
perennial ornamentals. Woody ornamentals are tested for 10 years, and herbaceous perennials for five
years. This report is the first summary of perennials that have survived the trial period with a winter
hardiness rating between zero and 2.5. Each plant in the trial is evaluated annually for winter injury and
rated on a scale of zero through four. A zero rating denotes no visible injury, and four is death. A score of
2.5 and lower indicates the plant grew well in the Garden. It may have shown symptoms of winter injury
but recovered in subsequent seasons. The species and cultivars listed in Table 1 are recommended for
further trial throughout Interior Alaska.
Plants are grown on a south-facing slope in Fairbanks silt loam soil. The plots have been cultivated
since about 1910. All plants receive full sun except those located in the shade house. Plants receive
supplemental irrigation, mostly hand weeding, and an annual application of 500 lb per acre (560.5 kg/ha)
10-20-20S fertilizer. Lilies receive 1500 lb (1,681.5 kg/ha) per acre of the same fertilizer. No plant
receives winter protection such as mulches, wind barriers or snow fences. Weather data are compiled
annually from U.S. Weather Service station (elevation 475 feet; 136 meters) located approximately 350 feet
(105 meters) west of the Garden. A summary of pertinent weather statistics is shown in Table 2
Circular 102
In 1989, a systematic evaluation of woody and herbaceous perennial landscape
plants was begun at the University of Alaska Fairbanks Georgeson Botanical Garden
(64°51’N, 147°52’W). These evaluations were expanded to include annual flowers in
1992 and ferns in 1993. The purpose of this research is to identify hardy perennials
capable of surviving in subarctic environments; to evaluate the ornamental potential of
perennials and annuals; and to fulfill a growing demand for information on landscape
plant materials by homeowners, commercial growers, and landscapers.Introduction -- Explanation of Plant Evaluation Tables -- Table 1. Weather records for the test years -- Table 2. All plant materials evaluated in 1994: Herbaceous perennials; Ferns; Ornamental grasses; Woody perennials -- Table 4. Plantings from 1994 that have not yet been evaluated for winter survival: Herbaceous perennials; Ferns; Woody perennials -- Table 5. Annual flowers evaluated in 1994 -- Appendix 1. Commercial Sources and Organizations -- Map of GB
Circular 109
Introduction -- Explanation of Plant Evaluation Tables -- Table 1. Weather records for the test years -- Table 2. All plant materials evaluated in 1996 -- Table 3. All plants that have been evaluated but did not survive the minimum number of test years -- Table 4. Plantings from 1996 that have not yet been evaluated for winter survival -- Table 5. Annual flowers evaluated in 1996 -- Appendix 1. Commercial Sources and Organizations -- Map of GB
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