The most beautiful spring paintings have been made by Vincent van Gogh.
Vincent van Gogh, Peach tree blossom, 1888
Vincent van Gogh, Almond tree blossom, 1890
Vincent van Gogh, Pear tree blossom
Like many modern artists Vincent van Gogh was inspired by Japanse art. He made a copy of a prune tree print by Utagawa Hiroshige:
Vincent van Gogh, Prune tre blossom after Hiroshige (1887)
Utagawa Hiroshige, Prune trees in Kameido, 1857
Van Gogh chose other colors than Hiroshige, and added Japanse signs from another print.
Van Gogh was also strongly influenced by Jean-Francois Millet (see here for the Starry Night)
Here is Millet’s spring: 
