Occasionally, native plants, wildflowers, berries and others, bloom in fall. I have seen it on high bush cranberries, red osier dogwood, willows. wild iris, wild roses and more. This year it is lingonberries. I have noticed a lot of flowers appearing at the same time as berry harvesting. Considering the season, this second bloom is not surprising. Spring warm temperatures came early, and in my garden, Oct 1, the temperatures reached 60F! Despite the cool, rainy summer, the lingonberry grew, bloomed, matured fruit, and went dormant. The dormancy period is very short for lingonberries- about 4 weeks of chilling temperatures (40F or lower). With the long season, it is no surprise that flower buds broke dormancy and started to bloom again. Of course, it is wasted genes. No fruit will form. This fall flowering definitely impacts next season’s flowering and fruiting.
Here is a link to an article by Canadian Researchers who are interested in following the growth, flowering and fruiting of two of the most important wild berries, cloudberry and lingonberry. They followed phenological sequences of flowering and fruiting and documented potential pollinators in their region. It is interesting to compare their cycles with Alaska. It was published in:
Canadian. Journal. of Plant Science. 96: 329–338 (2016)
Cloudberry and Lingon phenology
Abstract: Plant habitat, growth, fruit yield and occurrence of pollinators in cloudberry and lingonberry fields/bogs were monitored and analyzed at three locations in southern Labrador: Lanse’au Clair (51°41’ N, 57°08’ W), Red Bay (51°43’ N, 56°26’ W), and Cartwright (53°42’ N, 57°0’ W) over the two growing seasons, 2011 and 2012. The length of the growing seasons was 100–120 d (DFRA 2014) with 600–700 growing degree days (GDD) (AAFC 2014). The 2012 season was warmer than 2011. The plants recorded in belt transects belong to six families: Rosaceae, Ericaceae, Pottiaceae, Juncaeae, Equisetaceae, and Sphagnaceae. In the Ericaeae family, Vaccinium vitis-idaea, Arctostaphylos alpina, Empetrum nigrum, and Vaccinium angustifolium were found. In both seasons, the cloudberry was the first to bloom, followed by wild blueberry, lingonberry, and Labrador tea. The fruit yields of cloudberry and partridgeberry in southern Labrador were higher than those recorded in Finland, Norway, and in the USA. Pollinators were present in large numbers. Most of the specimens were from three orders: Hymenoptera, Diptera, and Lepidoptera. Temperature, precipitation, wind, and sunlight affected plant growth and the occurrence of pollinators. To our knowledge this is the most comprehensive study of plant growth, yield, and pollinators’ activity in cloudberry/partridgeberry fields conducted in Southern Labrador, Canada.