If it were just into flowering, you could have taken a try for the late flowers. In this case you first have to wait untill a female has male flowers than you'll have to wait untill the seeds are ripe. Again; you can try it out with the last flowers, but if this fails, you'll have useless seeds & f*cked up flowers. It's up to you to decide if it's worth the risk. Kind regards,
Siever
Siever