Evaluation location: Alaska, United States
The Palmer, Alaska (61.60 latitude 149.08 longitude, 113 meters altitude) growing season is very short (approximately 90-100 days) with up to 20 hours of continuous daylight. Planting took place the first week of June in cool, damp silty loam soils. The 2009 growing season consisted of mostly warm, dry days with an average high temperature of 75.3?F and average day length of 18 hours. There was very little rain and supplemental overhead irrigation was used when necessary. The major impediment during the season was a healthy weed population consisting mostly of Lambsquarters and chickweed. All weed control was done by hand.
For a Excel file of the 2009 Palmer Alaska data.