Hitachi Seaside Park (ひたち海浜公園) is one of the large flower park in Ibaraki. There are many seasonable flowers. Baby blue eyes in April is very famous in the world. Tulips and Linaria are blooming in late May.
Tourist Info.
There are parking and restroom.
Admission: 410 Yen for Adult, 210 Yen for senior, 80 Yen for kids. There is a group discount.
Open: 9:30
Close: 17:00 (3/1 to 7/20 and 9/1 to 10/31), 18:00 (7/21 to 8/31), 16:30 (11/1 to end of Feb.)
Close Day: Monday.
Access
0. at Mito Station.
1. use JR Joban Line to Katuta station.
2. use local bus to Hitachinaka Kaihinkoen.
410 JPY
3 hr.
Let's learn MJER Iaijutsu. 
映画好き集まれ！ 
Hitachi Seaside Park is one of the most popular flower park located in the middle of Ibaraki Prefecture. Baby blue eyes is the most famous feature of this park. In Late April, the large hill will be filled with beautiful blue flowers.
Flowers
Baby blue eyes: Late April to the middle of May.
Tulips and Linaria: Late May.
1 million Narcissus: March to April.
Rose: May to April.
Cosmos: October.
Official Web: http://hitachikaihin.jp/