In the middle of October, there is Cosmos Festival.
Yoshimi Town Cosmos (吉見町コスモス) is one of Cosmos Spot in Saitama. There are 6 million flowers which bloom in the middle of October.
Tourist Info.
There is parking, but no restroom.
Access
0. at Omiya Station.
1. JR Takasaki Line to Konosu Station.
2. use bus to Yoshimi Shiyakuso.
3. walk east (10min.)
1 hr.
Let's learn MJER Iaijutsu. 
映画好き集まれ！ 
In the middle of October, there is Cosmos Festival.