@livestockhub@ruthmcgregor4 If you can keep the ryegrass sward over summer (big if, i know) even if it is dormant but not dead, you can keep the Poa out, it can't germinate
@ruthmcgregor4 Hi Ruth, I have seen this. I reckon the tip of the emerging leaf gets caught in sheath of previous, so bends over. it breaks free but the bend causes ripples. Just my observations.