Plant Biology 2019 will be held Aug. 3-7 in San Jose, CA.

From the conference website: 

"The annual plant biology meeting has been held for over eight decades and has been dedicated to the fostering of plant scientists in their research and careers. Today the meeting attracts more than 1,300 scientists from 40 countries.

Every year the program features the latest research in plant science with five major symposia, thirty concurrent symposia bringing together young scientists to give talks as well as the top in their fields from around the globe."

More details on the conference, including the schedule of activities can be found here.