In May, even though some plants are still covered with snow, they begin producing energy through photosynthesis . Some plants do not actually begin to grow until all the snow is melted. However, when the plants are finally free of snow, they must seed and grow very quickly.
This is because the growing season is relatively short: only 10 to 14 weeks. During the growing season, the sun shines for 24 hours, and the tundra may receive as much solar energy as tropical areas near the equator. In the fall plants change colors and begin to shut down for the winter. Extra nutrients and shoots are saved in bulbs or roots for the next growing season.