Saga's Ogi Park is a picturesque spot to visit during spring when the cherry blossoms are in bloom - there are approximately 3000 of them on the grounds, so there's definitely no shortage of beauty to enjoy! The park has been designated as one of Japan's Top 100 sakura viewing spots, and for the history buffs out there, it has also been selected as one of the Top 100 Historical Parks in Japan (this is a country that likes lists!).
The best time to catch the cherry blossoms in bloom here tends to be from around late-March to early-April. If you can't make it to the park during sakura season, it's also known for azaleas and wisteria a little later in spring.