I disagree with Auteck's recommendation, and I'm a little surprised he recommended what he did. Your original grass seed mix selection was tall fescue, fine fescues and KBG. I suspect you have mostly tall fescue growing since you have bare spots. If the KBG in your original grass mix had germinated fully, then it should fill in bare areas in the sunnier parts of your lawn. I agree with him in that perennial rye is usually what is grown in your area, but there was no perennial rye in that original mix. Overseeding your lawn with it now will give you some throughout the whole lawn, but the bare spots will be all PR, and they will stand out against the TF you have now. My advice, use either all TF to overseed, or a mix that has similar percentages to your original mix. I would also stick with Pennington's as it is usually the best mix in the big box stores.

I'll chime in here, even though I have not grown either of these grasses. I do have direct experience with several other Miscanthus varieties, as well as other similar warm season grasses, so I think I can help. Pick the one you like the look of. Neither of them will be more prone to flopping IF you give them a suitable environment. That means good drainage, not-too-fertile soil, and plenty of sun (6-8 hours a day). They do have somewhat different habits, and each has a different look. Compare them on this chart: http://www.bluestem.ca/grass-comparison-chart.htm By the way...there are some newer varieties, like 'Gold Bar,' which offer the horizontal striping, with different habits and growth rates.

Jim my prairie is 8 years old now and there was a time when I thought it would never make it. I have waited 5 years just to see some plants bloom! It's very hard to spot seedling grasses in there first years. I'm guessing they are there, and will continue to spread. The only reason it would not be there is if the season was was very dry and the seedlings didn't make it. You may wish to try Switch grass and Prairie Dropseed also. Each plant type has its own needs and what ever the site is best suited for will thrive, so its hard to say if the rye will dominate. I have had it in my prairie for many years and it its not by any means the dominant grass. I have done well collecting my own seed and adding it to my prairie, but some years just don't favor the new plants. The cord grass likes wet ground so it may be a problem for you on your site. You say you like your prairie now, as the saying goes "you aint seen nothing yet"!

Thats just crap. If I was attempting to establish a meadow or prairie on an acreage or planting grasses for forage, I'd order PLS of a local genotype and rent a seeding machine. As it is, the marketed grasses selected for form, color and ornamental features such as resistance to flopping, is a better choice for a city landscape IMO. I want to keep the place looking neat. well planned and visually attractive. This is a challenge to do when working on a pocket prairie on an inner urban small yard. Its very easy to end up with a wild looking, overgrown mess that will bring the neighborhood down on a persons head with fines. As far as ecological factors go, my little area (an urban yard mind you) isn't much of a drop in the ocean in the bigger picture so I refuse to feel guilty or inferior on the Native Plant Scale of Purity no matter how often that needs to be heard. The yard in question is water-wise, requires no fertilizers running downhill into the stream down in the park like the rest of the block nor does it contribute to environmental pollution due to gas powered lawnmowers like most yards around here do. If I planted the local genotype switchgrass from seed collected as opposed to ones like 'Northwind' or 'Heavy Metal' which can only be grown from division and do not come true from seed, I'd have clumps that are gigantic by now. I love seeing them on the side of the road but unfortunately I do not have the space. The Blue Grama marketed under the name 'Blonde Ambition' was a chance discovery as many grasses being marketed are. It wasn't discovered right here in Oklahoma but its still native grass and so are the big and little bluestem grasses I'm growing. I bought some of these plants as opposed to seed, possibly to my discredit. The bluestem grass sold by nursery's under the commercial name 'Blaze' is one and the same as the Aldous variety which is also sold as PLS seed. Originally seed for this named type was collected in The Flint Hills of Kansas and was released by the Kansas Agricultural Experiment Station in 1966. Personally I have no problem with that. Similarly I have no problem with the two grass varieties I purchased that were tested developed and marketed by the Los Lunas Plant Materials Center and I find their efforts admirable in both cases. We have discussed this viewpoint before. I really cannot see the sense in being a slave to the idea of planting only local genotypes from collected seed born out of some kind of self imposed discipline in the quest for purity. It seems utterly ridiculous to stubbornly attempt that considering the reality is, the landscape I create is not natural by any stretch of the imagination even if it was all grown from seed sowed by myself. Making this idea seem even more ludicrous, the Trugreen truck was parked right across the street yesterday spraying the neighbor's lawn like they do every year and there was some other truck up the street doing the same along with everyones sprinklers going full blast to keep the lawn grass green here since we have been dry for a month now. BTW, Karl Forester is a non native grass. In any event, I seriously doubt it is being replicated 'everywhere' to the point of making it a bad idea ecologically speaking, even if it is popular and agreeably overused in landscaping when natives would be more refreshing to see. On that note, Miscanthus bothers me a lot more than KF.