That seed chart holds water. I've dropped a many of beans this way the only males were intentionally grown or from a bean that I couldn't really tell. But perfect round ends 100% of the time ended up female.
I'm sure 90% of growers have fem seeds on hand, go look. I bet all will have perfect round tips
I'm sure 90% of growers have fem seeds on hand, go look. I bet all will have perfect round tips