Someya Iris Garden (染谷花しょうぶ園) is one of the best Iris spots in Saitama. There are 200 kinds 20,000 Iris Flowers bloom in June. Iris is very beautiful under rain. So, it is one of the best spot to visit in a rainy season in Japan. There are also shopping area for saling flowers, seeds and plants.
Tourist Info.
There is parking (300 yen)
Admission: 500 yenf for Adult, 200 yen for elementery school and over 75 (however, 500 yen for over 75 on weekend).
There is group discount.
Period: All days of June.
Time: 9:00 to 17:00
Access
0. at Omiya Station.
1. use Kokusaikougyo bus number 7 to Someyashindo.
2. walk (10min.)
300 JPY
1 hr.
Let's learn MJER Iaijutsu. 
映画好き集まれ！ 
Someya Hanashobu en is one of the greatest Iris Garden around Tokyo. It is located in Saitama city, Saitama Prefecture.
There are about 200 kinds 20,000 Iris flowers in this garden. During the blossom season, beautiful Hydrangea blooms as well.
Official Web