Female-only flowers on cucumbers
I've currently got four cucumber plants growing outdoors in their own large patio tubs and they seem to be doing very well with lots of lush green growth and flowers. The problem is, all the flowers are female. The variety is Amanda F1 and I planted the seeds outside at the beginning of May (probably too soon?). I can't seem to find information that says this is a female-only variety and it seems that the usually problem is one of too many male flowers instead. Has anyone come across the problem of all-female flowers? This is my first year in trying to grow my own veg (all in containters) and it seems a shame to see so many baby cucumbers withering away.
Any advice would be appreciated! Here's a picture, too: