Our 17th green probably has the most poa annua of any green on the golf course. I would estimate about 60-70%. The photo below is a little difficult to see but the white areas throughout the green is the poa annua that has not grown up through winter damaged turf. The poa is severely regulated and is attempting to grow up through the winter tip burn. We are regulating the turf to allow the bentgrass to gain some ground on the poa and to control seedheads before we have to allow the poa to come back completely. We will have to do some additional seeding working to this green in the fall since the bentgrass is rather thin in many areas of the green. Shade is the biggest contributing factor to why this green is dominated by poa annua.
17 green
Close up of the back center of #17 green. The green patches are bentgrass.
August morning picture at 9:38 a.m. Shade still covereing 75% of the green.
10:54 a.m. picture. The close up area that I took a picture of has just gotten into the sunlight.
4:50 p.m. End of the day shade is ok for a green if it has had sun during a majority of the earlier part of the day.
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