After a little thought and research, the answer is very broad. How about less than 24 hours and up to 60 days! Why the wide range in time that a turf stand can withstand submersion? There are many factors at play, the most important is the ambient temperature and the temperature of the water.
Photo courtesy of pitchcare.com
To see a great publication from the Sports Turf Managers Association, click HERE.
To see a publication from Purdue University, click HERE.
To see a publication from Ohio State University, click HERE.
Go to j-dturf.com to learn more about J&D Turf.