As evident by its name, the Valley of Flowers is known for its vast diversity of alpine flowering shrubs located in the western Himalayas. The place is a part of the larger Nanda Devi Biosphere Reserve in Nainital, Uttarakhand. The valley is covered with snow from October till March, but as the summer arrives, the valley is turned into a palette of colorful flowers that covers the entire landscape.
I would love to visit the Valley of the Flowers park. It sounds so interesting because it's a high altitude park. So the plants and animals are all different than what we're used to seeing. As you mention, since it's high altitude, if you want to see the flowers, there's a relatively tight window to plan around. But I'm guessing it's worth it.