Spring season in Korea is usually between March and May. The warmer weather causes trees and grass to bud, but the temperature can also vary greatly, causing seasonal occurrences like spring colds*. The daily temperature range* varies greatly in the spring and the weather can be dry*. The Asian dust phenomenon* and northeasterly winds* are most prominent during this time. Various flowers bloom in the mild and warm spring weather; azaleas, forsythias, and royal azaleas are the forerunners of spring in Korea. In April and May, the flowers are in full bloom, attracting people to mountains and parks. In rural areas, spring is the time to start planting rice and potatoes, sow vegetable seeds, and prune the branches of fruit trees.