Shinjuku Gyoen is home to a large number of cherry trees of more than a dozen different varieties. From late March to early April, more than 400 somei yoshino trees blossom around the English garden turning the lawns into one of Tokyo's most popular and pleasant hanami spots. In addition, the park has numerous early and late blooming cherry trees which provide an extended cherry blossom viewing season (mid March to late April) for those who miss the main season.
Shinjuku Gyoen is also nice to visit during autumn when the leaves change. There are a lot of different types of trees that change colors around the park, however the maple trees are particularly beautiful and can be seen in large numbers around the Japanese garden and Momijiyama (maple mountain) on the park's eastern side. The colors typically appear from mid November to mid December.