Rhododendron is Nepal’s national flower of and found especially in the hilly areas above 1200m altitude. It blossoms from March to May in the spring season. The mid mountain vertical belt between 2,000 and 4,000 m serves as the ‘wild’ preserve of the rhodododendron, or GURANS and CHIMAL, the two words being used in Nepali. Below are the major areas for Rhododendron:
1.  Langtang national park, near from Kathmandu
2. Makalubarun national park
3. Milke Danda-Jaljale Himal, a transverse mountain range which separates the two river systems of the Tamur and the Arun
4.  Upper Tamur River Valley
There are 30 original kinds of Rhododendron and the one that is widespread throughout the country and not found elsewhere, is Rhododendron lowndesit. It has a lemon or velvety yellow flowers, which are short & well-shaped and are retiring or in pairs on the branch. It can be found near Muktinath and Phoksundo of western Nepal. Very grand sightings of Rhododendron can be assured in the south west side of Kanchenjunga area & the upper side valley of the Tamur river system. Nine species of Rhododendron can be observed In the upper area of Langtang Valley at around 2000m. The best time is from late March to mid June, and in addition to the Rhododendron, spring blooms of wild poppy, magnolia and primrose will undoubtedly make any trek a memorable one.