Would you still be able to view the sunflower fields at Narita Dream Dairy Farm in early September?

I understand peak viewing is till end August, but as I'm planning to go in early September, I was wondering if the sunflowers would still be in bloom then, or am I better off killing my sunflower dream this year and going with some other itinerary? I wanted to check on the Farm's official website but I kept getting the 'Forbidden – you do not have permission to view this site' error 😅