Wow, I was surprised to see this thread still alive. Here's the recap on what happened last year: The 2007 June-July-August heat and drought combined with a vacation basically killed the TTPR after it had been fantastic in the fall and spring, so when I was deciding whether to repeat the experiment by overseeding (really starting over) in year 2, I decided to change to the more drought/heat tolerant TTTF and try to find some cultivars with a thinner blade and dark green color. Of course, this spring of 2008 has been plenty wet and not too hot thus far, so any cool season grass would likely be doing very well at the moment, as is the TTTF. I will try to post some pictures soon. It has been filling in nicely, but is still clearly in year 1. It has a lot of maturing to do. One thing for certain, the TTPR grew MUCH faster that the current TTTF - I sure do not miss the cutting 3-times a week I had to do last spring. I now have the annual weeds under control and my current plan is to aerate and overseed again at labor day with some more TTTF. Last summer demonstrated that TTPR in the transition zone is water dependent, which made it a high-maintenance, and generally poor chooice for the drought last summer.

+1 bpgreen. They have different habits, growth rates, water requirements, and fertilizer requirements, too. There's nothing wrong with mixing them, but the results to a Lawn Whacko are somewhat disappointing. The average person would probably be fairly pleased. Bluegrass lawns require tremendous patience, and even the patient get IMpatient when Day 12 dawns and the stupid lawn has maybe ten percent color and you're pouring water on it and the weather refuses to cooperate... But I digress. :-) I know I just have to wait and in another week to 10 days I should have the start of a nice lawn. Now imagine that in the average Joe or Josephine. Joe isn't going to tolerate that, he microwaves his dinner and wants the lawn NOW. Hence the ryegrass, which pops up in five to seven days tops compared to KBG's 14 to 21 days. At that point, Joe stops watering (we're talking the average person here) and gets some of the KBG but not all of it. That's OK, the rye does well enough. Rye also fights chemical wars with surrounding plants to make sure it's the only thing growing. It can't kill an established plant, but it will keep other seeds from germinating. New rye probably doesn't do a good job at that, but future overseeding with anything but rye becomes difficult. Look up "alleopathy" if you're interested in learning more.

I agree that it is very popular in desert communities. Why? So the lawn care companies can make their boat payments all year long. In the north the lawn companies just switch over to snow blowing. Certainly it can be done. It does not help that the golf courses and football fields do it. Those multimillion dollar sports businesses make it easy for Scott's and others to advertise their products at the wrong time of year. The big sports complexes have the training and chemicals needed to kill the rye in the early spring so the bermuda can come back naturally. In San Antonio it is possible to have a green bermuda or St Augustine lawn all winter long by continuing with weekly watering and fertilizer. Last winter was unusually cold and I don't remember any lawns remaining green all winter, but most winters it's not that hard. You should be able to do it in Pho.

If you live in a part of the country where you can still get sod, i would just sod the trench line with bluegrass. You would only have to remove the top inch of soil, and that would be enough to wipe out the crap that was planted. If no sod is available, dig out some bluegrass plugs from the edge of your yard (like along a shrub bed or something) and plug the pieces every 6 inches along the trench line. First spray out the ryegrass with Roundup, because the perennial rye and fescue will live on forever if not sprayed.