I think we're missing a significant factor as it relates to American v Old World golf. The American hang up may be the result of the omnipresent desire for boutique grasses and visual stimulation. Across the pond it seems much more acceptable to have and maintain poa fairways, surrounds and roughs, each type of poa moving into and establishing itself according to its needs (mowing height, water, frequency, etc...). Here the demand for bent fairways creates that odd area at the “edge” where the drop into the bunker meets the fairway height. I don’t know if anyone has ever seeded bunker faces in bent, but it’s a thought. Could you even maintain it???
We use the bluegrass on our faces and on the bunker ring. We mow it at step height, ½” so it won’t stop your ball from going into the bunker. The reason we do so is to take and spread the wear at the corner or edge. Some folks drive along the edge of the bunker, some along the edge of the bluegrass. I think if we hadn’t done this, everyone would drive at the very edge of the bunker and the bent wouldn’t hold up. I pretty sure a healthy strand of poa would though. We have this “wear” issue with a lot of our cross hazards and angled seed lines. In addition where fairway lines are straight, the edge of the fairway is developing a road. The majority of players take the same route around the course like cattle at times, increasing localized stress and wear points. (In some places we are going to convert bent to blue this fall to better bear the stress.) On the side banks and fore bank of the bunker we fly mow at 3” once every two weeks, so those edges maintain their status as hazards. Bunker bottoms are raked, T, Th, F, Sa & S and I cringe every time I go back to the office and see Macdonald’s photo on the cover of Evangelist of Golf staring at me.
As for general maintenance, I’m a fan of greens, bunkers and tees first thing with fairways, inner roughs, steps done “in the gap” by team early afternoon off the first tee.
Cheers!
JT