A lot will depend on our rainfall in Sept and Oct and the cool fronts. If we get back to the rainfall like we had the first 6 months of year like they are calling for this fall, then you might be able to plant early. If you are still seeing 95+ deg days the later part of Sept then I would wait till we see cooler temps. I planted to early last year with the high temps we were getting. I was prepared like you were and got some early showers in Sept and took a chance on planting a bit early. Was supposed to rain for 8 days when I planted and got nothing in those 8 days. Then it quit raining for a month. I could have planted a month later and done just a well.